Federal Nuclear and Regulatory Authority of Russia
(GOSATOMNADZOR OF RUSSIA)
FEDERAL STANDARDS AND RULES IN THE FIELD OF USE OF ATOMIC ENERGY
APPROVED BY
Order № 6 of
Gosatomnadzor of the USSR
of 11 May 1989
EQUIPMENT AND PIPING OF
NUCLEAR POWER INSTALLATIONS.
WELDING AND OVERLAYING WELDING. BASIC PROVISIONS
PNAE G-7-009-89
AMENDMENT № 1
to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power Installations. Welding and Overlaying
Welding. Basic Provisions”
Effective since
1 June 1990
Moscow 2000
UDK 621.039
Equipment and piping of nuclear power installations. Welding and overlaying, basic provisions
PNAE G-7-009-89: Regulatory document. - M.: SEC NRS of Gosatomnadzor of Russia, 2000,
172 pages.
These Basic Provisions (BP) cover the welding and overlaying of equipment and piping, which are not subject to the “Rules for Layout and Safe Operation of Equipment and Piping of Nuclear Power Installations (hereinafter referred to as NPI Rules).
These BP establish basic requirements to welding equipment, welding materials, preparing and assembling for welding, welding, overlaying, heat treatment of welded joints and
overlaid parts (items), safety-at-works, as well as to the main recommended types of welded
joints and modes of welding (overlaying).
The repair of structures in use should be conducted in accordance with a process developed pursuant these BP and taking into account the features of the structure to be repaired.
TABLE OF CONTENTS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
General provisions
Welding materials
Requirements to welding equipment
Requirements to personnel
Preparing and assembling of parts for welding (overlaying)
5.1.
General requirements
5.2.
Preparing for welding (overlaying)
5.3.
Assembling
Welding
6.1.
General requirements
6.2.
Heating during welding (overlaying)
6.3.
Welding of parts made of steels of different structural classes
6.4.
Welding of parts made of two-ply steels
6.5.
Electroslag welding
6.6.
Argon-arc welding
Overlaying of corrosion resistant coatings
7.1.
General requirements
7.2.
Overlaying procedure
Heat treatment
Elimination of defects
Marking of welded joints and overlaid parts (items)
Safety requirements
Requirements to structural shapes of welded joints
Exemptions from established requirements
Attachment 1. Reference book of regulatory and technical documentation for welding materials
permitted for manufacturing, assembling and repair of equipment and piping of
nuclear power installations
Attachment 2. Provisional welding and overlaying modes
Attachment 3. Main types of welded joints
1. General Provisions
1.1. These BP include the requirements to:
1.1.1. Welding of parts made of steel grades: ОтЗсп5, 10, 15, 20, 15Л, 20Л, 25Л, 20К,
22К, 15ГС, 16ГС, 20СГЛ, 09Г2С, 10ХСНД, 10ХН1М, 16ГНМА, 15ГНМФА, 12МХ, 12ХМ,
15ХМ, 20ХМ, 20ХМА, 10Х2М, 12Х1МФ, 15Х1М1Ф, 10ГН2МФА, 10ГН2МФАЛ, 12Х2МФА,
15Х2МФА, 15Х2МФА-А, 18Х2МФА, 15Х2НМФА, 15Х2НМФА-А, 15Х3НМФА-А (hereinafter
the above listed steel grades are referred to as “perlitic steels”; the steel grades СтЗсп5, 10.
15, 20, 15Л, 20Л, 25Л, 20К, 22К are referred to as “carbon steels”; the steel grades 15ГС,
16ГС, 20ГСЛ, 09Г2С – as “manganese-silicon steels”; and other steel grades – as “alloyed
steels”).
1.1.2. Welding of parts made of high-alloyed steel grades 08Х13, 05Х12Н2М,
06Х12НЗД, 06Х12НЗДЛ, 08Х14МФ, 1Х12В2МФ, 07Х16Н4Б (hereinafter the above listed
steel grades are referred to as “high-chromium steels”).
1.1.3. Welding of parts made of high-alloyed corrosion resistant steel grades 08Х18Н9,
09Х18Н9, 10Х18Н9, 12Х18Н9, 08Х18Н10, 03Х16Н9М2, 08Х16Н11М3, 10Х18Н12МЗЛ,
10Х18Н9ТЛ, 12Х18Н9Т, 12Х18Н9ТЛ, 06Х18Н10Т, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т,
12Х18Н12Т, 10Х17Н13М2Т, 10Х17Н13МЗТ, 10Х18Н12МЗТЛ (hereinafter the above listed
steel grades are referred to as “austenitic steels”).
1.1.4. Welding of parts made of iron-nickel alloy grades 03Х21Н32МЗБ, Х15Н35ВЗТ,
10Х16Н36МЗТЮБР among themselves and the parts made of austenitic steels.
1.1.5. Welding of parts made of perlitic steels with parts made of high-chromium steels
and austenitic steels; parts made of high-chromium steels with parts made of austenitic steels
(hereinafter referred to as “welding of parts made of different structural steel grades”).
1.1.6. Welding of parts made of two-ply steels.
1.1.7. Overlaying of corrosion resistant coating.
1.1.8. Reinforcing overlaying.
1.2. The design documentation for welded joints (overlays) should be agreed upon with
the manufacturing enterprise (assembling organization).
1.3 Welding and overlaying should be conducted in accordance with the process and
engineering documentation (PED) (process instructions or process flowcharts) generated considering the requirements of these BP, regulatory document “Equipment and Piping of Nuclear
Power Installations. Welding and Overlaying. Rules for Inspection of Welded Joints and Overlaid Parts” (hereinafter referred to as RFI) and design documentation. PED should be agreed
upon in accordance with the procedure established in NPI Rules, Section 4. The same procedure is applied for modifications to the above documentation as regards the base and welding
materials, heating and heat treatment.
1.4. Welding of materials, which are not indicated in these BP but permitted for use by
NPI Rules is allowed as agreed upon with Gosatomenergonadzor of the USSR and in accordance with PED developed by the manufacturing enterprise (assembling organization) taking
into account the requirements of these BP and concurred with the Industry and Interagency
Leading Material Study Organizations. It is allowed to apply PED developed by the Leading
Material Study Organization.
N o t e . Hereinafter the Leading Material Study Organization should mean the Industry Leading Material Study Organization.
1.5. The use of welding (overlaying) techniques and/or welding materials, which are not
indicated in these BP, is allowed pursuant the procedure established in NPI Rules for the use
of new materials.
2. Welding Materials
2.1. The welding materials permitted for fabrication of welded joints of Categories I, II
and III and overlaying are given in Tables 1-5, and of welding joints of Categories Iн and IIн
are given in Tables 6-8. Definitions are given in RFI document.
2.2. The limiting permissible temperature at which the welded joints of Categories I, II
or III fabricated in accordance with these BP are to be used is similar to that established by
NPI Rules for steel grades the welded parts are made of, and in case of welded joints of Categories Iн and IIн it is given in Tables 6-8.
2.3. The welding materials for welding of parts (assembly units) should be the welding
materials intended for fabrication of welded joints of parts made of corresponding steel (alloy)
grades.
2.4 During assembling of parts and assembly units made of two-ply steels the tack
welds are fabricated in accordance with the requirements of these BP, para. 6.4.
During assembling of parts made of perlitic steels (except for parts made of steel
grades 15Х2МФА-А and 15Х2НМФА-А to be joined among themselves) it is allowed to use for
tack welds:
•
welding electrodes УОНИИ-13/45, УОНИИ-13/45А and УОНИИ-13/55, ЦУ-7, ЦУ-7А,
ТМУ-21У for manual coated electrode welding (only first three types of welding electrodes are allowed for assembling of the parts to be in contact with liquid metal coolant);
•
welding wire Св-08ГС and Св-08Г2С for argon-arc tack welding.
Welding electrodes УОНИИ-13/45АА, УОНИИ-13/55АА or ЦУ-7А should be used for
tack welding of parts made of steel grades 15Х2МФА-А or 15Х2НМФА-А among themselves.
2.5. In case of weld root welding of parts’ joints (assembly units) made of alloyed steels
joined together or with manganese-silicon and carbon steels (except for welded joints of parts
made of steel grades 15Х2МФА-А or 15Х2НМФА-А among themselves) it is allowed to use:
2.5.1. For manual arc coated electrode welding and argon-arc welding – the same
welding electrodes as for the tack welding as per Subsection 2.4.
2.5.2. For automated hidden arc welding – the welding wire Св-08А, Св-08АА and Св08АА-ВИ in combination with fluxing agents ОСЦ-45, АН-348А, АН-42, АН-42М and НФ-18М;
the welding wire Св-06А in combination with fluxing agents АН-42, АН-42М and НФ-18М; as
well as the welding wire Св-08ГА in combination with fluxing agent ФЦ-16.
N o t e . Weld root should be not more than 30% of the nominal thickness of the parts being
welded (design angle weld height) but not more than 20 mm.
2.6. The corresponding welding materials indicated in Table 1 should be used for welding of weld roots of parts made of steel grades 15Х2МФА-А or 15Х2НМФА-А among themselves. Besides the welding materials as per Table 9 are permitted.
2.7. To fabricate welding joints of Category III of parts made of steel grades Ст3сп5,
10, 15, 15Л, 20Л and 25Л it is allowed to use welding electrodes МР-3, 0ЗС-4, 0ЗС-6, and
АНО-4, and to fabricate welding joints of the same Category of parts made of steel 12Х1МФ
the welding electrodes ТМЛ-1У and ТМЛ-3У are allowed.
2.8. Welding materials should meet the requirements of standards, specifications and
charts indicated in Attachment 1 and have a certificate.
2.9. Welding materials should be stored as batches and their use for designated purpose should be ensured.
2.10. A definition of the coated welding electrode batch is given: for manual arc welding
– as per GOST 9466-75; for welding wire – as per GOST 2246-70; for overlaying tape – as per
GOST 4986-79; for fluxing agent – as per GOST 9087-81.
Table 1
Welding materials to fabricate welded joints of parts made of perlitic steels
(except for welded joints of Categories Iн and IIн)
Steel grades
of parts being
welded
1
СтЗсп5,10,15,
15Л, 20, 20Л,
25Л, 20К,
among themselves, with
steel 22К, with
manganesesilicon and
alloyed steels
Coated electrodes for
manual arc
welding
2
УОНИИ-13/45
УОНИИ13/45А
УОНИИ-13/55
ЦУ-5, ЦУ-6,
ЦУ-7, ЦУ-7А,
ТМУ-21У
Grades of welding materials in use
For automated hidden arc welding
Welding wire for
argon-arc
welding
Wire
Fluxing agent
(including gas
shielded welding)
3
4
5
Св-08А
ОСЦ-45,
Св-08ГС,
АН-42,
Св-08АА
Св-08Г2С,
АН-42М,
Св-08ГА
Св-06А
АН-348А,
АН-348АМ,
ФЦ-16
Св-06А
АН-42,
АН-42М,
НФ-18М
Св-08ГСМТ
АН-42,
АН-42М,
КФ-30
For electroslag welding
Wire
Fluxing
agent
6
Св-10Г2,
Св-12ГС,
Св-08ГСМТ
7
ОСЦ-45,
АН-8
Note
8
Wire Св08ГСМТ in combination with fluxing agents АН-42
and АН-42М;
and wire Св08ГС in combination with fluxing agents ФЦ11 and ФЦ-16
are used for
automated hidden arc welding
of steel grade
22К with nominal
Св-08ГС
Св-10Г2,
Св-08ГА
22К with 22К
and steel
grades 15ГС,
16ГС,
20ГСЛ,
09Г2С,
10ГН2МФА,
10ГН2МФАЛ,
15Х2НМФА
15Х2НМФА-А
УОНИИ-13/45
УОНИИ13/45А
УОНИИ-13/55
ЦУ-5, ЦУ-6,
ЦУ-7, ЦУ-7А,
ТМУ-21У
Св-10Г2
Св-08А,
Св-08АА
Св-06А
Св-08ГСМТ
ФЦ-11,
ФЦ-16,
ФЦ-22, КФ19,
КФ-30
ФЦ-11,
ФЦ-16,
КФ-27
ФЦ-22
ОСЦ-45,
АН-42,
АН-42М,
АН-348А,
АН-348АМ,
ФЦ-16
АН-42,
АН-42М,
НФ-18М
ОСЦ-45,
АН-42,
АН-42М,
АН-348А,
АН-348АМ,
КФ-30
wall thickness
more than
36mm.
At this, the weld
root layers are
made with welding wire Св-08А
or Св-08АА
Св-08ГС,
Св-08Г2С,
Св-06А
Св-10Г2,
Св-12ГС,
Св-08ГСМТ
ОСЦ-45,
АН-8
Св-08ГС
15ГС, 16ГС,
20ГСЛ, 09Г2С
with steel
grades 15ГС,
16ГС, 20ГСЛ,
09Г2С,
10ХСНД,
16ГНМА,
15ГНМФА,
12ХМ, 15ХМ,
20ХМ,
20ХМА,
10Х2М,
12Х1МФ,
15Х1М1Ф in
any combination
10ХСНД with
10ХСНД
УОНИИ-13/55
ЦУ-5, ЦУ-7,
ЦУ-7А
ТМУ-21У
УОНИИ-13/45,
УОНИИ13/45А
УОНИИ-13/55
ТМУ-21У, ЦУ5, ЦУ-6,
ЦУ-7, ЦУ-7А
Св-08ГС,
Св-12ГС
Св-10Г2,
Св-08ГС
Св-08ГА,
Св-10ГА
ФЦ-11,
ФЦ-16,
КФ-19, КФ30,
ФЦ-22
ФЦ-11,
ФЦ-16,
КФ-19
ФЦ-22
ОСЦ-45,
АН-348А,
АН-348АМ
Св-08ГС,
Св-08Г2С
Св-10Г2,
Св-12ГС
ОСЦ-45,
АН-8
Welding electrodes ЦУ-5 are
used only for
welding of weld
roots.
Св-08ГС,
Св-08Г2С
Св-10Г2
ОСЦ-45,
АН-8,
ОФ-6
Welding electrodes ЦУ-5 are
used only for
welding of weld
roots.
10ХН1М with
10ХН1М and
with
10ХСНД
УОНИИ-13/45
УОНИИ13/45А
УОНИИ-13/55
Н-20, Н-25
Св-08ГСМТ
Св-10НМА
Св-08ГА,
Св-10ГА
Св-10ГН1МА
16ГНМА with
16ГНМА and
with
15ГНМФА,
12ХМ, 15ХМ,
20ХМ, 20ХМА
15ГНМФА
with
15ГНМФА and
with 12ХМ,
15ХМ,
20ХМ, 20ХМА
ЦЛ-21, ЦЛ-48
ЦЛ-52
Св-10НМА
Св-10ГНМА
КФ-30, АН42, АН-42М
АН-42,
АН-42М
ОСЦ-45,
АН-348А,
АН-348АМ
КФ-27, КФ30
ФЦ-11, ФЦ16
ФЦ-11, ФЦ16
Св-08ГС,
Св-08Г2С
Св-04Х2МА,
Св-08ГСМТ
ОФ-6
Св-10НМА
Св-10НМА
ФЦ-11,
АН-8,
ОФ-6
Св-10ГНМА
-
-
-
-
10ГН2МФА,
10ГН2МФАЛ
with
10ГН2МФА
and
10ГН2МФАЛ
and with
15Х2НМФА,
15Х2НМФАА,
15Х3НМФА,
15Х3НМФАА
12МХ, 12ХМ,
15ХМ, 20ХМ
among themselves and
with 20ХМА,
12Х1МФ,
15Х1М1Ф
10Х2М with
10Х2М and
with 12ХМ,
15ХМ,
12Х1МФ,
15Х1М1Ф
20ХМА with
20ХМА
ПТ-30
ЦЛ-59
Св-10ГНМА
Св-10ГН1МА
ФЦ-16
Св-10ГНМА,
Св-10ГН1МА
Н-3, ЦУ-2ХМ,
ЦЛ-38
Св-08ХМ
ФЦ-11, КФ16
Св-08ХМ,
Св-08ХГСМА
Н-10
Св-04Х2МА
КФ-16
Св-04Х2МА
Н-3, ЦУ-2ХМ,
ЦЛ-38
Св-08ХМ,
Св-08ХМФА
АН-42,
АН-42М
-
Св-10ГН2МФА
-
ОФ-6,
ФЦ-21
-
-
-
For argon-arc
welding it is allowed to use
welding wire
when silicon content is not less
than 0.22%
-
For argon-arc
welding it is allowed to use
welding wire Св08ХМ when silicon content is
not less than
0.22%
-
-
-
12Х1МФ,
15Х1М1Ф with
12Х1МФ,
15Х1М1Ф
Н-6, ЦЛ-20,
ЦЛ-39, ЦЛ-45
Св-08ХМФА
ФЦ-11,
ФЦ-16,
КФ-16
Св-08ХМФА,
Св-08ХГСМФА
15Х3НМФА
with
15Х3НМФА
and
15Х3НМФАА
15Х2НМФА
with
15Х2НМФА
and with
15Х2НМФАА
РТ-45Б, Н-23
Св-09ХГНМТА,
Св-09ХГНМТААВИ
НФ-18М,
КФ-30
Св-08ГСМА,
Св-08ГСМТА
Св16Х2НМФТА
ОФ-6
РТ-45А,
РТ-45АА,
РТ-45Б
Св-12Х2Н2МА,
Св-12Х2Н2МАА
ФЦ-16
Св-12Х2Н2МА,
Св-12Х2Н2МАА
Св16Х2НМФТА
ОФ-6,
ФЦ-21
Св-09ХГНМТА,
Св-09ХГНМТААВИ
Св-09ХГНМТААВИ
НФ-18М
Св-09ХГНМТА
Св-09ХГНМТААВИ
Св-12Х2Н2МАА,
Св-12Х2Н2МААВИ
ФЦ-16А
НФ-18М,
КФ-30
15Х2НМФА-А
with
15Х2НМФА-А
15Х2НМФА-А
with
15Х2НМФА-А
-
РТ-45АА
НФ-18М
КФ-30
-
Св-12Х2Н2МАА
Св-09ХГНМТААВИ
-
-
For argon-arc
welding it is allowed to use
welding wire
Св-08ХМФА
when silicon content is not less
than 0.22%
-
-
-
-
-
-
-
-
12Х2МФА,
15Х2МФА,
18Х2МФА
among themselves and
with15Х2МФА
А
15Х2МФА-А
with
15Х2МФА-А
Н-3, Н-6, Н3АА, ЦЛ-20
Св-10ХМФТ,
Св-10ХМФТУ
АН-42М,
КФ-30
-
Св-13Х2МФТ,
Св-13Х2МФТА
ОФ-6
-
-
Св-10ХМФТУ
АН-42М,
КФ-30
-
Св-13Х2МФТА
ОФ-6
-
Table 2.
Welding materials to fabricate welded joints of parts made of high-chromium steels with parts made of high-chromium steels and
perlitic steels (except for welded joints of Categories Iн and IIн)
Steel grades of parts being
welded
08Х13 with 08Х13 and with
06Х12Н3Д (06Х12Н3ДЛ),
1Х12В2МФ
06Х12Н3Д (06Х12Н3ДЛ)
with 06Х12Н3Д
(06Х12Н3ДЛ) and with
10ГН2МФА, 10ГН2МФАЛ
1Х12В2МФ with 1Х12В2МФ
08Х14МФ with 08Х14МФ
08Х14МФ with steels 20 and
22К
05Х12Н2М with 05Х12Н2М
07Х16Н4Б with 07Х16Н4Б
•
Grades of welding materials in use
Coated welding elecFor automated hidden arc welding
trodes for manual arc
wire
fluxing agent
welding
УОНИИ/10Х13
Св-06Х14
АН-22
ЦЛ-51
Св-01Х12Н2-ВИ
ОФ-6
ЦЛ-51
Св-01Х12Н2-ВИ*
ОФ-6
ФЦ-19
ЦЛ-32
ЦЛ-51
ЦТ-45
ЦТ-45
ЦЛ-51
Св-14Х12НВМФ
Св-01Х12Н2-ВИ
АН-17М
ОФ-6
ФЦ-19
ОФ-6
Св-01Х12Н2-ВИ*
-
-
-
Welding wire for argon-arc welding (including for gas shielded welding)
Св-06Х14
Св-01Х12Н2-ВИ
Св-01Х12Н2МТ-ВИ
Св-01Х12Н2-ВИ
Св-10Х11НВМФ
Св-01Х12Н2-ВИ
Св-03Х20Н45Г6М6Б-ВИ
Св=01Х12Н2-ВИ
Св-03Х20Н45Г6М6Б-ВИ
Св-01Х12Н2МТ-ВИ
Св-09Х16Н4Б
With preliminary overlaying except for parts made of steel grades 10ГН2МФА, 10ГН2МФАЛ, 20 and 22К with welding
electrodes ЦЛ-51.
Table 3
Welding materials to fabricate welded joints of parts made of austenitic steels (except for welded joints of Categories Iн and IIн)
Steel grades of parts being
welded
10Х18Н9ТЛ
12Х18Н9Т
12Х18Н9ТЛ
06Х18Н1ОТ
08Х18Н1ОТ
12Х18Н1ОТ
08Х18Н12Т
12Х18Н12Т
10Х17Н13М2Т
(in any combination)
03Х21Н32МЗБ with
03Х21Н32МЗБ and with
12Х18Н9
12Х18Н9Т
08Х18Н1ОТ
12Х18Н1ОТ
08Х18Н12Т
10Х17Н13М3Т
Coated welding
electrodes for
manual arc
welding
ЭА-400/10У
ЭА-400/10Т
ЦТ-15К
ЦТ-26
ЦТ-26М
ЭА-898/21Б
ЭА-902/14
ЭА-855/51
Grades of welding materials in use
For automated hidden arc welding
Welding wire for
argon-arc
welding
Wire
Fluxing agent
(including gas
shielded welding)
Св-04Х19Н11М3
ОФ-6 ФЦ-17 Св-04Х19Н11М3
Св-08Х19Н10МЗБ
ОФ-6
Св-08Х19Н10Г2Б
Св-04Х20Н10Г2Б
ОФ-6
Св-08Х19Н10Г2Б
Св-04Х20Н10Г2Б
Св03Х15Н3517М6Б
ОФ-6
Св03Х15Н35Г7М6Б
For electroslag welding
Wire
Fluxing
agent
Св04Х19Н11М3
(wire)
Св-06Х19Н9Т
(wire)
08Х18Н1ОТ
(plate)
-
ОФ-6
ОФ-6
ОФ-6
-
10Х18Н12МЗТЛ
08Х18Н10Т,
12Х18Н10Т with
10Х16Н36М3ТЮБР
-
-
-
Св30Х15Н35В3БЗТ
-
N o t e . In case of hidden arc welding of parts made of steel grade 08Х18Н10Т with the use of welding wire Св-04Х19Н11М3
intended for operation at temperature below 200°С, it is permitted to use fluxing agent АН-26 or АН-26С provided each batch of
welding wire is preliminary checked along with each batch of fluxing agent whether the welded joints specially fabricated with the
use of these materials have cracks in the root metal; the welded joints are tested using radiographic and metallographic techniques.
-
Table 4
Welding materials to fabricate welded joints of parts made of austenitic steels with parts made of perlitic and high-chromium
steels (except for welded joints of Categories Iн and IIн)
Characteristics of parts be- Grades of welding materials for preliminary overlaying of edges
ing welded
of parts made of perlitic and high-chromium steels
Materials
Nominal part
Coated
thickness in
welding
welding loca- electrodes
tion, mm
for manual
arc overlaying
Austenitic Up to 10 (insteels with clusive)
carbon
steels or
manganese-silicon
steels
-
For automated hidden arc
overlaying
Tape or wire
Flux.
agent
-
-
Independently ЭА-395/9, Св-10Х16Н25АМ6
of thickness
ЦТ-10
ОФ10
Welding wire for argon-arc welding
-
Св-10Х16Н25АМ6
Grades of welding materials to fabricate weld
Coated
welding
electrodes
for manual
arc welding
For automated hidden arc
welding
Wire
Welding wire for argon-arc welding
Flux.
agent
ЭА-395/9
ЦТ-10
СВ-10Х16Н25АМ6
ОФ-6
Св-10Х16Н25АМ6
ЗИО-8
ЦЛ-25/1
ЦЛ-25/2
Св-07Х25Н13
ОФ-6
СВ-07Х25Н13
ЭА-855/51
СвОЗХ15Н35Г7М6Б
ОФ-6
СвОЗХ15Н35Г7М6Б
ОФ-6
Св-04Х19Н11МЗ
ЭА-400/10У Св-04Х19Н11МЗ
ЭА-400/10Т
ЦТ-26 ЦТ26М
ЭА-855/51 Св-ОЗХ15Н3517М6Б
СВОФ-6 ОЗХ1БН35Г7М6Б
First layer
ЭА-395/9 Св-10Х16Н25АМ6
ОФЦТ-10
10
ЭА400/10У,
ЭА
400/10Т,
ЦТ-26,
ЦТ-26М
Austenitic
steels with
alloyed
steels or
highchromium
steels
Up to 6 (inclusive)
-
Св-10Х16Н25АМ6
Second and subsequent layers
Св-04Х19Н11М3
ОФ- Св-04Х19Н11МЗ
10
ФЦ18
(tape)
ОФ10
ФЦ17
(wire)
-
-
Independently
First layer
of thickness
ЭА-395/9* Св-10Х16Н25АМ6*
ОФЦТ-10*
10
-
Св-10X16Н25АМ6*
Second and subsequent layers
ЭА-855/51
СвОЗХ15Н35Г7М6Б
ЭА-400/10У Св-04Х19Н11МЗ
ЭА-400/10Т
ЦТ-26 ЦТ26М
ОФ-6
СвОЗХ15Н35Г7М6Б
ОФ-6 Св-04Х19Н11МЗ
ФЦ-17
ОФ-6
ЭА-898/21Б СВ-04Х20Н10Г2Б
ЦТ-15К
Св-08Х19Н10Г2Б
СВ-04Х20Н10Г2Б
Св-08Х19Н10Г2Б
ЭА-395/9*
ЦТ-10*
СВ-11Х16Н25АМ6* ОФ-6
Св-10X16Н25АМ6к
ЭА-855/51
Св0ЗХ15Н35Г7М6Б
Св0ЗХ15Н35Г7М6Б
ОФ-6
ЭА-400/10У Св-04Х19Н11МЗ
ЭА-400/10Т
ЦТ-26,
ЦТ-26М
ОФ-6 Св-04Х19Н11МЗ
ФЦ-17
ЭА-898/21Б Св-04Х20Н10Г2Б
ЦТ-15К
Св-08Х19Н10Г2Б
ОФ-6
Св-04Х20Н10Г2Б
Св-08Х19Н10Г2Б
ЭАСв-04Х19Н11МЗ
400/10У
ЭА400/10Т
ЦТ-26 ЦТ26М
ОФ- Св-04Х19Н11МЗ
10
ФЦ18
(tape)
ОФ-6
ФЦ17
First and subsequent layers
ЭА-855/51 Св-0ЗХ15Н35Г7М6Б ОФ-6 СвОЗХ15Н35Г7М6Б
ЭА-855/51
Св0ЗХ15Н35Г7М6Б
ОФ-6
Св0ЗХ15Н35Г7М6Б
Notes to Table 4
Notes:
1. The welding materials which are used only for welding and overlaying niobium non-containing steels are marked with an asterisk.
2. Heat treatment of welded joints with welds fabricated using niobium
3.
4.
5.
6.
non-containing welding materials is not permitted.
While making angle and tee- welding joints with the design angle
weld height of up to 10 mm inclusive when the parts made of austenitic steels are welded to these of carbon and manganese-silicon
steels of any thickness and up to 6 mm inclusive when the parts
made of austenitic steels are welded to these of alloyed and highchromium steels, the necessity of preliminary edge overlaying is determined by the design documentation and PED requirements.
Automated hidden arc overlaying and welding using welding wire Св07Х25Н13 and Св-10Х16Н25АМ6 and automated hidden arc overlaying using welding wire Св-04Х19Н11МЗ are permitted as agreed
with the leading material study organization.
In case of combined welding techniques the welding materials should
be used, which are indicated in the same line of the Table (separated
by horizontal lines).
In case of manual coated electrode arc welding using welding electrodes ЭА-855/51 or argon-arc welding using welding wire СвОЗХ15Н35Г7М6Б it is allowed not to preliminary overlay edges of
parts made of perlitic and high-chromium steels if the parts with overlaid edges are not subject to heat treatment in accordance with the
requirements of these BP.
7. The welding of austenitic steels with parts made of perlitic and highchromium steels using filler materials non-containing niobium is permitted only in cases of forced heat treatment of the welded joint of
these steels provided the PED for such welding is agreed upon with
the interagency leading material study organization.
Table 5
Welding (overlaying) materials for overlaying of corrosion resistant coating on parts (items) made of perlitic steels
Characteristics of
coating being overlaid
Overlaid
layers
By type By number
of overlaid
layers
1
Uniform
For automated hidden arc overlaying
Tape or wire
2
Singlelayer
3
4
5
Нп-0ЗХ22Н11Г2Б ФЦ-18 (tape), ФЦСв-0ЗХ241113Г2Б 17 (wire)*
ОФ-10, ФЦ-18
(tape),
ОФ-6 (wire) *
ОФ-10
First
СВ0ЗХ15Н35Г7М6Б
Св-07Х25Н13
Second
Св-04Х20Н10Г2Б
All
Two-layer
Fluxing agents
Св-07Х25Н13
Multi-layer All
Double
Grades of welding (overlaying) materials
ОФ-10, ФЦ-18
(tape)
ОФ-10, ФЦ-18
(tape) ОФ-6, ФЦ-17
(wire)**
Coated welding
electrodes for
manual arc overlaying
Note
Welding wire for argon-arc overlaying
6
ЭА-855/51
7
8
СВ-0ЗХ15Н35Г7М6Б Permitted only for overlaying of parts made of
steel grades 20, 20К,
22К
ЦЛ-25/1, ЗИО-8** Св-07Х25Н13
(first layer) ЗИО8, ЦЛ-25/2 (second layer and
subsequent layЭА-855/51
СВ-0ЗХ15Н35Г7М6Б
ЦЛ-25/1
ЗИО-8**
ЭА-898/21Б
ЦТ-15К
Св-07Х25Н13
-
Св-04Х20Н10Г2Б
-
Multi-layer First
Св-07Х25Н13
Secon
Св-04Х20Н10Г2Б
and sub- Св-08Х19Н10Г2Б
sequent
ОФ-10, ФЦ-18
(tape) ОФ-6 (wire)*
ЦЛ-25/1
ЗИО-8**
ОФ-10, ФЦ-18
ЭА-898/21Б
(tape) ОФ-6, ФЦ-17 ЦТ-15К
(wire)**
Св-07Х25Н13
There should be not less
than two layers made
with wire Св08Х19Н10Г2Б and electrodes ЭА-898/21Б, ЦТ15К
Св-04Х20Н10Г2Б
Св-08Х19Н10Г2Б
N o t e s : 1. The welding materials, which are permitted for use only upon agreement with the leading material study organization, are marked with an asterisk.
2. The welding electrodes which batches are permitted for use provided the content of the ferritic phase in the overlaid metal is
not less than 4% are marked with two asterisks.
3. Subject to the agreement by the leading material study organization it is permitted to use welding wire Нп-03Х22Н11Г2Б and
Св-03Х24Н13Г2Б in combination with fluxing agent ФЦ-18 to fabricate the first layer of coating.
4. Heat treatment of overlaid corrosion resistant coating having the first layer made with niobium non-containing filler materials is
not permitted.
5. In case of a single-layer coating it is permitted to use welding electrodes ЭА-855/51 and welding wire СВ-0ЗХ15Н35Г7М6Б
only to eliminate defects in the layer.
Table 6
Welding materials to fabricate welded joints of Categories Iн and IIн of parts made of perlitic and high-chromium steels
Grades of welding materials in use
Maximum permissible
temperature in use,
Steel grades of parts Coated welding For automated hidden arc weld- Welding wire for ar0
С
electrodes for
ing
gon-arc welding (inbeing welded
manual arc
cluding
gas
shielded
wire
flux. agent
welding
welding)
СтЗсп5, 10, 15, 20, 22К УОНИИ-1З/45* Св-08А*
ОСЦ-45*
Св-08ГС
350
in any combination
УОНИИАН-348А*
Св-08Г2С
Св-08АА*
13/45А*
КФ-27
Св-10Г2
УОНИИ-13/55
12Х1МФ, 15Х1МФ
Н-6
Св-08ХМФА
КФ-16
Св-08ХМФА
550
in any combination
05Х12Н2М с
ЭМ-959/52
Св-01Х12Н2МТ- КФ-28
Св-01Х12Н2МТ-ВИ
550
05Х12Н2М
ВИ
10Х2М с 10Х2М
Н-10
Св-04Х2МА
КФ-16
Св-04Х2МА
510
Notes:
1. The welding materials permitted for use where the nominal thickness of parts being welded is not more
than 60 mm are marked with an asterisk.
2. Subject to agreement with the leading material study organization it is permitted to carry out: manual arc
welding of parts made of carbon steels using welding electrodes ТМУ-21У; automated hidden arc welding
of parts made of steel grade 22К using welding wire Св-08ГС in combination with fluxing agent ФЦ-16.
Table 7
Welding materials to fabricate welded joints of Categories Iн and IIн of parts made of austenitic steels
Steel grades of parts being welded
08Х18Н9. 08Х18Н10,
08Х18Н10Т,
12Х18Н10Т,
10Х18Н12МЗТ in any
10Х18Н9, 12Х18Н9,
08Х16Н11МЗ in any
combination
0ЗХ16Н9М2 with
0ЗХ16Н9М2
08Х16Н11МЗ with
08Х16Н11МЗ
09Х18Н9, 08Х18Н10
in any combination
0ЗХ16Н9М2 with
0ЗХ16Н9М2
Grades of welding materials in use
Coated
For automated hidden arc Welding wire for arwelding
welding
gon-arc welding (inelectrodes
cluding
gas shielded
wire
flux.
for manual
welding)
agent
arc weldА-1, А-1Т Св-04Х17Н10М2 ОФ-6 Св-04Х17Н10М2
А-2, А-2Т Св-02Х17Н10М2- ОФ-6 Св-02Х17Н10М2-ВИ
ВИ
А-1, А-1Т Св-04Х17НЮМ2
ОФ-6
ЦТ-26
ЦТ-26М
ОФ-6, Св-0ЗХ16Н9М2
ФЦ-17
Св-ОЗХ16Н9М2
Св-04Х17Н10М2
-
-
-
-
-
-
-
-
-
-
-
-
For electroslag welding
wire
fluxing
agent
-
-
-
-
-
-
Св-04Х17Н10М2 ОФ-6
(wire)
Св-04Х19Н11МЗ ОФ-6
(wire) 12Х18Н9
(plate)
Св-0ЗХ16Н9М2
(wire)
ФЦ-17
Maximum permissible temperature in use, oC
600
600
(дfor welding of
parts made of
steel grade
12Х18Н9-450)
600
550
550
550
12Х18Н10Т,
08Х18Н10Т with
10Х15Н36ВЗТ-ВД
ЭА-855/51
ЭА-582/23
-
-
Св-0ЗХ15Н35Г7М6Б
-
-
550
Table 8
Welding materials to fabricate welded joints of Categories Iн and IIн of parts made of austenitic steels with parts made of perlitic
and high-chromium steels
Characteristics of parts being
welded
Steel grade
08Х16Н11МЗ,
08Х18Н10 or
08Х18Н10Т with
ВСт3сп5, 10, 15, 20
or 22К in any combination
Nominal part
thickness in
welding location, mm
Up to 10
(inclusive)
over 10
Grades of welding materials for preliminary
overlaying of edges of parts made of perlitic
and high-chromium steels
Coated welding
electrodes for
manual arc overlaying
-
ЭА-395/9
08Х16Н11М3,
Up to 6 (inclu09Х18Н9,
sive)
08Х19Н10 or
08Х18Н10Т with
КГИ-7
12МХ, 12ХМ, 15ХМ, Over 6
ЭА-395/9*
10Х2М, 12Х1МФ,
15Х1МФ or 08Х13
Grades of welding materials for fabrication of weld
Welding wire for argon- Coated welding elecarc overlaying
trodes for manual arc
welding
-
ЭА-395/9
All layers
Св-10Х16Н25АМ6
ЭА-400/10У
ЭА-100/10Т
ЭА-З95/9*
КТИ-7
ЭА-395/9
First layer
Св-З0Х15Н35ВЗБЗТ
Св-10Х1бН25АМ6*
Second and subsequent layers
Welding wire for argon-arc
welding
Св-10Х16Н25АМ6
Св-04Х19Н11МЗ
Св-10Х16Н25АМ6
Св-ЗОХ15Н35ВЗБЗТ
Св-10Х16Н25АМ6
А-1, А-1Т
А-2, А-2Т
ЭА-400/10У*
ЭА-400/10Т**
08Х16Н11МЗ,
Up to 6 (inclu09Х18Н9,
sive)
08Х18Н10 with
12Х1МФ, 15Х1МФ,
over 6
ЭА-395/9*
10Х2М
Св-04Х17Н10М2
Св-02Х17Н10М2-ВИ
Св-04ХГ9Н11МЗ**
А-1, А-1Т
А-2, А-2Т
ЭА-400/10У**
ЭА-400/10Т**
ЭА-395/9X
КТИ-7
First layer
Св-10X16Н25АМ6к
Св-З0Х15Н35ВЗБЗТ
Second and subsequent layers
А-1, А-1Т, А-2, А- Св-04Х17Н10М2
2Т
Св-02Х17Н10М2-ВИ
ЭА-400/10У*
ЭА-400/10Т*
08Х18Н10Т with
08Х14МФ
Independently
of thickness
_____________________________
*Only for temperatures not more than 500°С.
** Only for temperatures not more than 450°С.
Св-04Х19Н11МЗ*
Св-04Х19Н10М2
Св-02Х17Н10М2-ВИ
Св-04Х19Н11МЗ
Св-10Х16Н25Ам6
Св-З0Х15Н35ВЗБЗТ
А-1, А-1Т
ЭА-400710У**
ЭА-400/10Т**
А-2, А-2Т
Св-04Х19Н10М2
Св-02Х17Н10М2-ВИ
Св-04Х9Н11МЗ**
ЦТ-45
СВ-З0Х20Н45Г6М6Б-ВИ
Table 9
Welding materials used for welding of the weld roots of parts made of steel
grades 15Х2МФА-А or 15Х2НМФА-А
Steel grades of
parts being welded
Grades of welding materials
For automated hidden arc
welding
Wire
Св-08АА-ВИ
1БХ2МФА-А with
15Х2МФА-А
15Х2НМФА-А with Св-0ЗАА-ВИ
15Х2НМФА-А
Coated welding electrodes
for manual arc welding
Flux.agent
АН-42М
УОНИИ-13/45АА
ФЦ-16А
АН-42М
ЦУ-7А
УОНИИ-13/45АА
It is allowed to include in one batch the fluxing agent of one grade
from several melts provided all mass of fluxing agent batch is homogeneously
mixed-up (as a whole or in proportional amounts)
2.11. It is allowed to consider shielding gas of one name, one kind,
one brand (group) supplied according to one and the same standard or under
one and the same specifications as a shielding gas batch.
2.12. Welding wire and filler tape should be stored under the conditions preventing their soiling, corrosion and damage.
2.13. Coated welding electrodes and fluxing agents after tempering
should be stored in closed sacks made of waterproof fabric (polyethylene film)
or in closed tare under rubber-sealed lid or in drying boxes at temperature of
80±20°С or in storage rooms at temperature not less than 15°С and relative
air humidity not more than 50%.
2.14. In case of storage, after tempering (initial or repeated), in a
package or in drying boxes as per Subsection 2.13, the shelf life of coated
welding electrodes and fluxing agents and their service life without humidity
check and additional tempering are not limited.
2.15. In case of storage, after tempering, in the storage rooms as per
Subsection 2.13 the coated welding electrodes and fluxing agents may be
used without humidity check and re-tempering within the timelines indicated in
PED.
In this case the established timelines should not exceed:
•
for welding electrodes with basic coating and designed for welding of perlitic and high-chromium steels – 5 days;
•
for other welding electrodes - 15 days.;
•
for fluxing agents OФ-6 and OФ-10 - 3 days;
•
for other fluxing agents - 15 days.
2.16. In case the welding electrodes and fluxing agents storage conditions under Subsection 2.13 are violated or the timelines indicated in Subsection 2.15 expire the welding electrodes and fluxing agents before use are subject to humidity check and re-tempering.
2.17. In any cases where during the check the humidity value in
coated electrodes or in a fluxing agent exceeds values established by standards or specifications for the welding materials being checked, they should
be subjected to re-tempering
2.18. Tempering quality of each setting of welding electrodes H-10,
fluxing agents KФ-I6 and КФ-27, as well as welding electrodes УОНИИ13/45А and УОНИИ-13/55 to be used for welding of parts made of steel
grade 10X2M among themselves and with parts made of perlitic steels, is determined by hydrogen content in the overlaid metal or weld metal in accordance with the methodology of the leading interagency material study organization.
At this, the hydrogen content in the overlaid metal (weld metal) in case
of manual arc welding should not exceed 2.5 cm3 per 100 g, and in case of
automated hidden arc welding it should not exceed 3.0 cm3 per 100 g. Should
the results be negative the re-tampering of welding electrodes and fluxing
agents is done followed by the determining of hydrogen content.
It is allowed, upon agreement with the leading interagency material
study organization, to skip the determining of hydrogen content in the overlaid
metal when individual batches of welding materials designated for welding of
specific parts are checked.
2.19. If a batch of welding electrodes or fluxing agents was tempered
in parts in different time, the requirements of Subsections 2.14-1.17 relate to
each individual part.
2.20. Tempering modes of welding electrodes and fluxing agents before use should correspond to the modes established in standards or specifications for the welding materials of specific grades.
If the standards or specifications do not contain instructions regarding
tempering temperature and hold-up time, before using the welding electrodes
and fluxing agents, one should be guided by the instructions given in Table
10.
2.21. It is allowed to carry out tempering of welding electrodes not
more than three times and the fluxing agents ОФ-6 and OФ-10 – not more
than five times (not count in the tempering during fabrication). Number of
tempering for other fluxing agents is not limited.
2.22. The date and modes of each tempering operation should be entered in a special log. It is allowed to indicate such data on labels or under
marking on a package.
2.23. The tempered electrodes and fluxing agents should be transported to the welding stations in a closed tare (rubber-sealed tare, waterproof
paper bags or polyethylene sacks).
2.24. The welding electrodes should be given to welders in the amount
necessary for one-shift assignment unless the PED establishes more rigid
requirements. During the issue procedure the welding electrode grade should
be checked by tags, welding electrode edge identification color or coating
color. Austenitic welding electrodes and wire should be checked by a magnet.
2.25. A procedure for accounting, storage, issue and return of the
welding materials is established by an instruction to be developed by the enterprise carrying out welding (overlaying).
Table 10
Recommended tempering modes for coated welding electrodes and fluxing
agents
Name of welding materials
Grade of welding materials
Tempering
temperature,
°С
Coated welding УОНИИ-13/45А
400±20
electrodes
УОНИИ-13/55 ,
465 ±15*
Н-3,Н-6,Н-10,Н-23,Н-25,Н-20,РТ-45Б 465 ±15*
Fluxing agents
УОНИИ-13/45, УОНИИ-13/10Х13
ТМЛ1-1У, ТМЛ-3У, ТМУ-21У
ОЗС-6, МР-3, ОЗС-4, АНО-4
ЭА-400/10У, ЭА-400/10Т,
ЭА-898/21Б, ЭА-902/14
ЭМ-959/52
А-1, А-2, А-1Т, А-2Т
ЭА-395/9, ЗИО-8
ЭА-855/51
ЦУ-5, ЦУ-6, ЦУ-7, ЦУ-7А, ЦУ-2ХМ,
ПТ-30, ЦЛ-20, ЦЛ-21, ЦЛ-32, ЦЛ-38,
ЦЛ-39, ЦЛ-45, ЦЛ-48, ЦЛ-51, ЦЛ-52,
ЦЛ-59,РТ-45А, РТ-45АА
ЦЛ-25/1, ЦЛ-25/2, ЦТ-10, ЦТ-15К,
ЦТ-24, ЦТ-26, ЦТ-26М, ЦТ-45
АН-348А, АН-8, АН-348АМ
АН-42, АН-42М, АН-26, АН-26С
КФ-16, КФ-19, КФ-27, КФ-30,
НФ-28М
ОФ-6
ОФ-10
ОСЦ-45
ФЦ-11
ФЦ-16,ФЦ-16А
ФЦ-17, ФЦ-19, ФЦ-21, -22
ФЦ-18
Hold-up
time,
h
3.0+0.5
3.0+0.5
3.0+0.5
400±20
400±20
200±20
135±15
2.5+0.5
2.0+0.5
2.0+0.5
2.0+0.5
465±15
135±15
225±25
360±20
360±20
5.0+0.5
2.0+0.5
2.0+0.5
2.0+0.5
2.0+0.5
330±120
1.5+0.5
350±50
б50±20
725±25
4.5+0.5
4.0+0.5
3.0+0.5
905±25
960±10
375±25
375±20
620±20
5+0.5
5+0.5
2+0.5
4+0.5
4+0.5
650±20
800±20
4+0.5
3+0.5
______________
*It is permitted to reduce the tempering temperature down to 400+20 0С, as
agreed upon with the leading interagency material study organization.
2.26. The tempering of fluxing agents should be done in electric furnaces on trays made of heat-resistant steels.
2.27. The tempering modes of fluxing agents should be monitored using thermocouples installed directly in the fluxing agent layer. During tempering the layer thickness of fluxing agents ОФ-6 and ОФ-10 should not exceed
100 mm, and in case other fluxing agents it should be established in the PED.
It is allowed to monitor the tempering mode of fluxing agents using furnace
(dome) thermocouples provided their have been properly calibrated against
the thermocouples installed in the fluxing agent.
3. Requirements to Welding Equipment
3.1. The welding and overlaying should be done using only workable,
complete and adjusted installations, hardware and tools which ensure meeting all requirements of these BP, RFI and PED as well as the monitoring of
the preset modes.
3.2. The direct current stations should be used for manual welding
(overlaying). It is permitted to use alternating current stations for manual arc
welding (overlaying) with rutile-coated welding electrodes.
3.3. Each automated argon-arc welding (overlaying) station should be
connected to an independent welding current supply source.
3.4. The argon-arc welding (overlaying) equipment should provide for
a possibility for smooth arc extinction. In case of manual argon-arc welding it
is permitted to extinct arc by switching off welding current or by slow removal
of the torch from the product.
3.5. The welding equipment for automated arc and electroslag welding
(overlaying) should be furnished with a voltmeter, ammeter and devices which
ensure preset welding speed, and the equipment for manual arc welding
(overlaying) should be furnished with an ammeter.
It is allowed to use portable ammeters for periodic monitoring of welding current value.
4. Requirements to Personnel
4.1. Welding, overlaying and tacking of parts and assembly units
should be done by welders who passed qualification tests for performing
welding operations in accordance with the requirements of the Rules for
Qualification of Welders of Equipment and Piping of Nuclear Power Installations (PNAE G-7-003-87) of Gosatomenergonadzor (hereinafter referred to
as “Rules for Qualification of Welders”) and who have Welder’s Certificates
issued according to the established format. At this, the welders are permitted
to perform corresponding welding (overlaying) operations which are indicated
in their certificates.
Besides, each welder should be given a personal stamp, which is to
be registered in the TCU log or in the registration log of other controlling authority.
4.2. Welding, heating and heat treatment of welded joints and overlaid
parts (items) should be carried out by employees who have done training and
passed qualification tests. The scope of training, test procedures and frequency of re-testing are determined by the enterprise conducting corresponding operations.
4.3. The engineers, who lead assembling, welding, overlaying, heating
and heat treatment operations, should be qualified in accordance with the
“Unified Provisions for Testing of Knowledge of Heads and Specialists of Gosatomenergonadzor of the USSR in Regulations, Standards and Instructions
of Safe Conduct of Operations in Nuclear Power”.
5. Preparing and Assembling of Parts for Welding (Overlaying)
5.1. General requirements
5.1.1. The parts (assembly units) should be prepared and assembled
for welding (overlaying) in accordance with the PED developed pursuant the
requirements and guidelines of these BP and drawings.
5.1.2. The PED for assembling should indicate:
•
the tools and equipment used for assembling;
•
assembling procedure and sequence;
•
way of fixing the parts;
•
welding techniques, materials and modes for tack welding and
welding of temporary engineered fixtures;
•
dimensions, number and locations of tack welds;
•
number of temporary engineered fixtures, their locations and
sizes of welds where they are welded to the product;
•
inspection techniques of the assembling quality;
•
other necessary data to list all engineering and control operations.
5.1.3. It is allowed to incorporate the PED for assembling and the relevant PED for welding (overlaying).
5.2. Preparation for welding (overlaying).
5.2.1. The edges and surfaces of parts should be prepared for welding
by machining.
5.2.2. It is permitted to prepare edges of parts made of perlitic carbon
and manganese-silicon steels using oxygen, air-arc or plasma-arc cutting followed by machining (grinding, etc.) to remove traces of cutting.
5.2.3. Oxygen, air-arc and plasma-arc cutting may be permitted for
preparing of edges of parts made of perlitic alloyed steels only as a preliminary operation followed by mechanical removal of not less 1 mm thickness
metal layer in case of alloyed steels with the guaranteed yield stress of up to
315 MPa at temperature 20°С inclusive; and not less than 2 mm in case parts
made of steels with the guaranteed yield stress of more than 315 MPa. In doing so, in necessary cases to prevent crack formation the cutting is done with
preliminary heating of metal in accordance with the PED guidelines.
5.2.4. It is permitted to prepare the edges of parts made of austenitic
steels using plasma-arc or powder-flame cutting followed by removal of not
less than 1 mm layer of metal by machining.
5.2.5. The shape and structural elements of part edges prepared for
welding should correspond with the requirements of these BP or drawing.
5.2.6. When preparing for butt joining of parts with different nominal
thickness a smooth transition (bevel) should be made on the thicker parts as
per the requirements of NPI Rules.
5.2.7. When preparing the tubes of the same nominal diameter and
nominal wall thickness for butt welded joints having one-side grooving the
tube ends should be calibrated (bored or expanded) to achieve the given inner diameter (see Subsection 12.11).
5.2.8. The edges (surfaces for overlaying) and adjacent sections of
parts prepared for welding should be cleaned from dross, rust, paint, oil and
other surface soiling. The width of the above sections should be not less than
20 mm in cases where the parts are prepared for arc welding (overlaying) and
not less than 50 mm in cases where parts are prepared for electroslag welding.
5.3. Assembling.
5.3.1. All parts received for assembling and assembly units should be
marked and/or supplied with documentation to confirm that they have been
accepted by the Technical Control Service. The type of marking is determined
by the PED or the manufacturing enterprise (assembling organization).
5.3.2. The assembling of tubes and other cylindrical or conical parts to
make annular butt welds should be done in accordance with the PED requirements and using the welding equipment or assembling and welding
equipment and tooling which ensure concentricity of the parts (assembly
units) being assembled.
5.3.3. It is allowed to use arc coated electrode welding or argon-arc
welding to fabricate tack welds and welding of temporary engineered fixtures.
While assembling parts for argon-arc or electron-beam welding (including argon-arc welding of the weld root) the tack welds should be made by
argon-arc welding.
5.3.4. The tack welds should be made by welders who have permits to
fabricate joints requiring tacking.
5.3.5. To make tack welds the welding materials indicated in Subsection 2.4 should be used.
5.3.6. Defective tack welds should be removed by machining (grinding, etc.). In cases described in the PED regarding joints of parts made of perlitic steels it is allowed to remove the defective tack welds by arc-air gouging.
5.3.7. It is not permitted to tack the locations of crossing or coupling of
two or several joints to be welded.
5.3.8. Welding of temporary engineered fixtures is permitted only in
cases indicated in the drawings or PED. At this, the following should be specified: the steel grade, shape, dimensions, number and locations of the above
fixtures, qualification of welders making welding of the fixtures, welding materials, techniques and modes of welding and heating.
The use of temporary engineered fixtures while assembling parts
made of austenitic steels and iron-nickel alloys is permitted where the nominal
thickness of parts is not less than 6 mm.
5.3.9. Tack welding and welding of temporary engineered fixtures
while assembling parts made of alloyed and high-chromium steels should be
done with heating of metal in the welding zone according to the mode established for a given welded joint except for the cases where the welding is done
with the use of austenitic filler materials.
During tacking the heating is not mandatory in case of welded joints,
which weld root is made by argon-arc welding without heating.
5.3.10. While assembling parts made of perlitic steels and/or highchromium steels the temporary engineered fixtures in use should be made of
steel of the same grade that the parts being assembled; and in case assembling of parts made of austenitic steels, iron-nickel alloys and/or two-ply steels
(with a fixture to be welded to the clad layer) the fixtures should be made of
steel grade 08Х18Н10Т.
In cases described in the PED it is allowed to use temporary engineered fixtures made of steels, which are close in chemical composition and
mechanical properties to the “indicated steels” as well as to use fixtures made
of carbon steels in case of assembling the parts made of austenitic steels
and/or two-ply steels.
5.3.11. The following should be used for welding of temporary engineered features to parts (assembly units) made of perlitic steels without corrosion resistant coating:
•
the same welding materials that are used for tack welds pursuant
Subsection 2.4, the base metal heating requirements para. 5.3.9
being met;
•
coated welding electrodes ЗИО-8, ЦЛ-25/1, ЭА-395/9 or ЦГ-10 or
welding wire Св-10Х16Н25АМ6 or Св-07Х25Н13 without heating
of the base metal.
5.3.12. The following should be used for welding of temporary engineered fixtures to parts (assembly units) made of high-chromium steels:
•
coated welding electrodes or welding wire permitted for fabrication of welded joints of parts made of corresponding steel grade
or coated welding electrodes ЦЛ-51 or welding wire Св-01Х12Н2ВИ (two latter filler materials are used independently of the assembled parts’ steel grades) – to weld fixtures made of highchromium steels, the base metal heating requirements of para.
5.3.9 being met;
•
coated welding electrodes ЭА-395/9, ЦТ-10, ЦЛ-25/1, ЦЛ-25/2,
ЗИО-8 or welding wire Св-10Х16Н25АМ6 or Св-07Х25Н13 – to
weld fixtures made of carbon and high-chromium steels to niobium non-containing steels without heating of the base metal;
•
coated welding electrodes ЦЛ-25/1, ЦЛ-25/2, ЗИО-8 or welding
wire Св-07Х25Н13 – to weld fixtures made of high-chromium
steels to niobium-containing steels without heating.
5.3.13. The following should be used for welding of temporary engineered fixtures to parts (assembly units) made of austenitic steels:
•
coated welding electrodes and welding wire permitted for fabrication of welded joints of parts made of corresponding steel grades
- to weld fixtures made of austenitic steel;
•
coated welding electrodes ЭА-395/9 and ЦГ-10 or welding wire
Св-10Х16Н25М6 – to weld fixtures made of carbon steels.
5.3.14. Coated welding electrodes and welding wire permitted for fabrication of welded joints of parts made of a corresponding steel grade should
be used for welding of temporary engineered fixtures to parts made of ironnickel alloys.
5.3.15. Coated welding electrodes or welding wire permitted for fabricating the upper layer of the corresponding corrosion resistant coating should
be used for welding of temporary engineered fixtures to the clad layer (corrosion resistant coating) of parts made of two-ply steels.
At this, the preliminary two-layer overlay should be fabricated on the
edges of fixtures made of carbon steels, the following requirements being
met:
•
in case there is niobium or titanium in the corrosion resistant coating metal the first layer of the overlay should be made with coated
welding electrodes ЦЛ-25/1 or ЗИО-8 or with welding wire Св07Х25Н13 and the second layer should be made with welding
electrodes ЦТ-15К or ЭА-898/21Б or with welding wire Св04Х20Н10Г2Б or Св-08Х19Н10Г2Б;
•
if there is no niobium or titanium in the corrosion resistant coating
metal, both layers are fabricated with coated welding electrodes
ЦЛ-25/1 or ЗИО-8 or with welding wire Св-07Х25Н13.
5.3.16. The surface of parts in the fixture welding locations should be
free preliminary cleaned from dross, rust, paint, oil and other soiling.
5.3.17. The welds of temporary engineered fixtures should be located
at a distance of not less than 60 mm from the edges subject to welding. It is
allowed to reduce this distance down to 30 mm in case of assembling the
parts made of carbon and manganese-silicon steels.
5.3.18. Temporary engineered fixtures are removed by machining. At
this, in case of parts made of carbon and manganese-silicon steels it is allowed to remove temporary engineered fixtures completely by oxygen or airarc cutting without deepening into the base metal and followed by grinding of
parts’ surfaces to remove traces of cutting.
It is allowed to partially remove temporary engineered fixtures on parts
made of austenitic steels; they are removed by oxygen (powder flame),
plasma-arc or air-arc cutting. At this, the remaining part of the fixture should
be not less than 4 mm high and is subject to subsequent removal by machining.
While removing temporary engineered fixtures it is allowed to partially
remove their weld metal. In cases where the temporary engineered fixtures
are welded with austenitic filler materials to parts made of perlitic steels and
high-chromium steels, as well as in cases where the above materials are
used to weld fixtures made of carbon steels to the parts made of austenitic
steels, it is allowed to partially remove weld metal on the side which will not
be in contact with operating environs, but if the corrosion resistant coating is
to be overlaid subsequently, the weld metal is allowed to be partially removed
on both sides.
5.3.19. If the gap between would-be welded edges (shoulders) of the
assembled parts does not meet the established requirements and the design
documentation does not set forth more rigid requirements, it is allowed to perform the following operations:
•
in case of gap exceeding the established guidelines not more
than 0.5 mm of nominal base metal thickness of edges to be
welded but not more than 10 mm – the overlaying of edges (one
or two) with coated welding electrodes or welding wire (for argonarc overlaying) of grades, which are intended for fabrication of a
given welded joint. In case of overlaying only the root sections of
the joined parts made of perlitic steels it is allowed to use filler
materials used for welding of weld root of the given joint; the overlaying should be done along with heating if such treatment is designed for the welded joint being fabricated; after overlaying the
edges are subject to machining to achieve the designed geometry; at this, the parts made of alloyed and high-chromium steels
should be preliminary (before machining) heat treated using the
inter-tempering mode if the heat treatment of the given welded
joint is envisaged by these BP and/or PED;
•
in case of gaps, which are less than the established values – machining (grinding, undercutting followed by grinding, etc.) of the
edges prepared for welding;
•
in cases where the amount of metal the edges of parts made of
carbon and manganese-silicon steels are overlaid with, but not
more than 20 cm3, - heating during overlaying and heat treatment
may not be done irrespectively of the nominal thickness of parts
being assembled.
5.3.20. It is not permitted to increase sizes of parts by overlaying.
5.3.21. The assembling on the remaining backing rings is permitted for
tubular joints among themselves or with other cylindrical parts of piping
Groups B and C with nominal outer diameter more than 300 mm accessible
for welding only on one side in cases where the welding without backing rings
is not possible or technically inexpedient due to the design features of the
structure.
The use of welded joints with backing rings should be agreed upon
with the leading material study organization and specified in the design
documentation.
It is not permitted to use the remaining baking rings with unwelded
cross-sectional parting.
5.3.22. The remaining backing rings should be made of the following
materials:
•
for welding of parts made of the same grade of material – the
grade of material as the parts being welded;
•
for welding of parts made of perlitic steels of different grades, as
well as for welding of parts made of high-chromium steels of different grades – the less alloyed steel out of the steel grades being
combined;
•
•
•
for welding of parts made of austenitic steels of different grades,
as well as for welding of parts made of austenitic steels with parts
made of perlitic steels or high-chromium steels with preliminary
overlaying of edges with austenitic filler materials – the steel
grade 08Х18Н10Т or the same grade of austenitic steel as one of
the parts being welded;
for welding of parts made of perlitic steels with parts made of
high-chromium steels – the high-chromium steel of the same
grade as one of the parts being welded where the welded joint is
fabricated with high-chromium filler materials or the austenitic
steels (08Х18Н10Т) where the welded joint is fabricated with austenitic filler materials;
for welding of parts made of iron-nickel alloys among themselves
and with parts made of austenitic steels – the iron-nickel alloys.
N o t e . It is allowed to use the remaining backing rings made of carbon
steel to fabricate welded joints of parts made of perlitic steels irrespectively of their grade at operating temperature of up to 450°С.
5.3.23. In the butt joints assemble for welding the edge displacement
(misalignment of surfaces of parts being joined together) and dulling, gaps
between matched edges (shoulders) of parts, as well as between a backing
ring and the pipe should meet the requirements of these BP, RFI and drawings.
5.3.24. In the joints assembled for welding the geometric position of
parts (bending or perpendicularity of axes, etc.) should correspond to the requirements of the design documentation. It is not permitted to assembly pipes
using tightening. The latter requirement does not cover the closing welds fabricated with cold tightening provided the pipes to be welded are rigidly fixed.
5.3.25. After assembling the edges and adjacent surfaces grinded during preparing for welding are subjected to secondary mechanical grinding (as
necessary). The grinding should be done by an abrasive wheel or steel brush.
The necessity to degrease edges is specified in the PED (with identification of materials used for degreasing).
5.3.26. After the assembling for manual arc coated electrode welding
the surfaces of parts made of austenitic and iron-nickel steels adjacent to the
edges should be protected from metal spray. At this, the width of protected
zone should be not less than 100 mm both sides of the edges prepared for
welding. The same protection is recommended in case of welding of temporary engineered fixtures to the surfaces of parts made of austenitic steels. The
protection techniques are to be specified in the PED.
The requirement of this paragraph is not mandatory if the fabricated
welded joints are subject to subsequent machining to remove a metal layer of
not less than 0.5 mm thick in the specified zone.
5.3.27. In cases where it is necessary to transport the assembled
parts (assembly units) to a welding station the conditions should be arranged
for to prevent destruction of tack welds or temporary engineered fixtures
welds, as well as deformation, damage to and soiling of parts assembled for
welding.
6. Welding
6.1. General Requirements.
6.1.1. Welding of parts (assembly units) should be carried out in accordance with the PED developed pursuant the requirements and guidance of
these BP and drawings.
The PED should establish:
•
welding (overlaying) techniques;
•
qualifications of welders;
•
types of welded joints to be fabricated;
•
welding current type and polarity;
•
welding equipment in use;
•
combinations of grades of base and welding (overlaying) materials;
•
necessity, techniques and modes of preliminary and concurrent
heating during welding (overlaying);
•
spatial positions of welding (overlaying);
•
assortment of filler materials;
•
welding (overlaying) modes with regard to specific welded joints
(overlays);
•
techniques and modes of preliminary and concurrent heating during welding (overlaying) (if specified);
•
sequence of beads and weld and overlay layers (as necessary);
•
types of heat treatment of welded joints and overlaid parts (if such
is specified);
•
keeping conditions of welded joints (overlaid parts) since completion of welding (overlaying) until beginning of heat treatment;
•
techniques and scope of in-process inspection of welding (overlaying).
Exemplary welding modes to fabricate certain welded joints are given
in Attachment 2.
6.1.2. The following welding (overlaying) techniques may be used to
fabricate welded joints:
•
automated hidden arc welding (overlaying);
•
manual arc coated electrode welding (overlaying);
•
automated, semi-automated and manual argon-arc welding (overlaying);
•
electroslag welding;
•
vacuum electron-beam welding;
•
plasma welding (overlaying);
•
diffusion welding (only for joining the steel and zirconium fuel
channel tubes).
The argon-arc welding should mean as argon-shielded welding as the
welding under mixtures of argon and helium (at any ratio), with welding car-
bonic acid gas of up to 25% (except for welding of austenitic steels and ironnickel alloys), with oxygen of up to 5%.
It is permitted to apply carbonic acid gas machine welding with welding wire Св-08Г2С to fabricate welded joints of Category III of parts made of
carbon and manganese-silicon steels.
6.1.3. The welding (overlaying) techniques, which are not listed in
para. 6.1.2, are permitted for application after relevant qualification tests pursuant NPI Rules, Subsection 3.4.
6.1.4. It is permitted to apply two or several welding (overlaying) techniques out of the list given in para. 6.1.2 to fabricate one welded joint (combined welding).
6.1.5. Welding (overlaying) should be carried out in the conditions,
which ensure that the requirements of PED related to protection of welding
location from any impacts to welding quality (atmospheric precipitation, etc.)
are met.
Welding operations to manufacture equipment and assembly parts of
piping are not permitted at the ambient air temperature below 0°С.
It is allowed to carry out welding in assembling conditions at the ambient air temperature not lower than -15°С.
6.1.6. When the ambient air temperature is below 0°С welding (overlaying) of perlitic steels and high-chromium steels should be carried out with
additional or increased heating. In case of welded joints fabricated at the ambient air temperature above 0oC without heating the minimum temperature of
preliminary and concurrent heating should be not less than 50°С (additional
heating). In case of welded joints fabricated with mandatory heating the minimum heating temperature, pursuant to this Document and PED, should be
increased by 50°С (increased heating).
It is allowed to weld parts made of austenitic steels and iron-nickel alloys without heating at the ambient air temperature not lower than 5°С. At the
lower ambient air temperature the minimum heating temperature should not
be below 0°С.
6.1.7. Before welding (overlaying), if necessary, the secondary grinding and degreasing of edges and adjacent surfaces is done. At this, the degreasing is compulsory for all parts made of austenitic steels assembled for
welding. In other cases the degreasing necessity is established by the PED.
6.1.8. The grades of welding and overlaying materials in use should
correspond to those indicated in Tables 1 through 9 of these BP.
6.1.9. During fabrication of multi-pass welds and overlays, after each
bead, the weld and groove surfaces should be thoroughly cleaned from slag,
metal spray and visually inspected by welder whether they have cracks, nonpermitted slag (tungsten) inclusions, pores, roughness (undercuts, bulges,
pockets between beads) and other defects. The revealed defects should be
eliminated before welding is resumed. In case of machine welding the
welder’s control over individual beads may be done in the process of welding
(without its termination).
6.1.10. All shrink holes (craters) should be thoroughly sealed or
brought up into removable envelope of metal or welded cleats.
6.1.11. Welding of angle welds, which are subject to leaktightness requirements as established in drawings should be fabricated not less than in
two layers.
6.1.12. In case of two-sided welding (including the fabrication of a
backing bead it is permitted to remove partially or completely the root section
of the weld before welding on the second side.
In case of two-sided welded joint (or single-sided weld with a backing
root bead) it is permitted to carry out grooving and welding on one side in sequence followed by grooving and welding on another side.
In case of two-sided welding of parts made of austenitic steels and
iron-nickel alloys it is recommended to make beads facing the operating environs as the final pass. The necessity to follow this recommendation is determined by the PED.
6.1.13. While making multi-pass welds of welded joints of parts made
of austenitic steels and iron-nickel alloys the welding process should be terminated after each pass until the metal cools down to not higher than 100°С
in the welding zone.
When the austenitic filler materials with specified ferritic phase content
are used it is permitted to increase the above temperature limit up to 250°С.
The temperature measurement points are established in the PED.
6.1.14. When welding is completed the weld surface and adjacent
base metal zone should be cleaned from slag and metal spray at the width
necessary for follow-up inspection.
6.1.15. Manual arc welding (overlaying) carried out with welding electrodes which cores are made of austenitic steels should be done in narrow
beads with width of not more than three diameters of the welding electrodes
in use.
6.1.16. The weld roots of welded joints of parts made of steel grade
08Х18Н12Т, as well as pipes made of carbon steels with nominal wall thickness of 12 mm are recommended to fabricate using a filler wire.
6.2. Heating during welding (overlaying).
6.2.1. The necessity and minimum temperature of preliminary and
concurrent heating of parts during welding of parts (assembly units) made of
perlitic and high-chromium steels depending of a steel grade and thickness of
parts being welded are established according to Table 11.
In specific cases the PED may clarify (correct) the requirements of this
Subsection as regards heating temperature and thickness of parts being
welded for which the heating is required.
In cases not covered by Table 11 the necessity and minimum heating
temperature are established by the PED (as agreed upon with the leading
material study organization).
The heating is not done (except for the cases indicated in the PED)
during welding and overlaying (including reinforcing overlaying) of parts made
of austenitic steels and iron-nickel alloys.
6.2.2. The maximum heating temperature should not exceed the established minimum one more than 150°С.
6.2.3. When the parts made of different steel grades (out of the listed
in Table 11) are welded the minimum heating temperature is assumed with
regard to the steel for which the heating at higher temperature is envisaged.
6.2.4. The parts of different nominal thickness are welded the minimum heating temperature is established in the PED, and if there are no such
guidelines in the PED it is selected as in Table 11 basing on the nominal
thickness of the thicker part.
6.2.5. In cases where the parts made of steel grades 12Х2МФА,
15Х2МФА, 15Х2МФА-А and 18Х2МФА are overlaid with perlitic filler materials the minimum heating temperature values for overlaying of the first layer
should not be less than 200°С and not less than 150°С for subsequent layers.
6.2.6. Upon agreement with the leading material study organization, in
case of combined welding of pipes requiring heating the argon arc welding of
weld root is permitted to carry out without heating irrespectively of the pipe
steel grades and thickness.
6.2.7. In case of preliminary overlaying of part edges made of perlitic
and high-chromium steels with austenitic filler materials the heating is done
only for overlaying of the first layer. The necessity and minimum heating temperature are established pursuant Table 11 (as for the welding of parts being
overlaid).
Table 11
Minimum preliminary and concurrent heating temperature during welding
Minimum heating temperature, °С
Steel grades of Nominal thick- For arc weld- For electroslag For overlaying
parts being
ness of parts
ing
welding
of edges with
welded
being welded,
austenitic filler
mm
materials
Ст3сп5, 10, 15,
15Л, 20, 20Л,
20К
22К, 25Л
Up to 100
(inclusive)
Over 100
Up to 60
(inclusive)
Over 60
Up to 40
(inclusive)
10ХСНД
Over 40
10ХН1М
Up to 40
(inclusive)
Over 40
15ГС, 16ГС,
Up to 30
09Г2С, 20ГСЛ, (inclusive)
16ГНМА
Over 30
10ГН2МФА.
Up to 50
10ГН2МФА,
(inclusive)
15ГНМФА
Over 50
-
-
-
100
Heating
is
not required*
100
Heating
is
not required
100
Heating
is
not required
100
Heating
is
not required
150
50
-
-
-
-
-
-
-
50
-
-
150
-
120
100**
100
12МХ, 12ХМ
15ХМ
20ХМ,
20ХМЛ,
20ХМА
10Х2М
12Х1МФ
15Х1М1Ф.
15Х1М1ФЛ
15Х2НМФА,
15Х2НМФА-А,
15ХЗНМФА
15ХЗНМФ-А
12Х2МФА
15Х2МФА,
15Х2МФА-А,
18Х2МФА
08Х13,
05Х12Н2М
Up to 10
(inclusive)
Over 10 up to
30
(inclusive)
Over 30
Up to 6
(inclusive)
Over 6
Up to 6
(inclusive)
Over 6
Up to 6
(inclusive)
Over 6 up to
30 (inclusive)
Over 30
Up to 6
(inclusive)
Over 6 up to
30 (inclusive)
Over 30
Irrespectively
of thickness
The same
Heating
is
not required
150
-
-
50
100
200
100
150
-
-
-
200
-
100
-
150
-
100
-
-
100
-
200
150
100
250
-
200
-
150
-
250
200
150
300
150
250
150
200
150
150
150
150
Up to 80
(inclusive)
Over 80
Irrespectively
of thickness
200
100
150
200
200
150
150
150
150
Up to 6
(inclusive)
Over 6
100
100
06Х12НЗД
Up to 30
(inclusive)
Over 30
100
100
12Х11В2МФ
Up to 30
250
150
250
(inclusive)
Over 30
300
200
250
___________________
* The necessity of heating during welding of parts made of steel grade 22K is
established upon agreement with the leading material study organization
** The heating is permitted to avoid in case thickness of up to 150 mm inclusive.
6.2.8. Welding of parts made of perlitic and high-chromium steels (as
among themselves as with parts made of austenitic steels), which edges have
been preliminary overlaid with austenitic filler materials, is carried out without
heating.
6.2.9. In cases where the part edges made of perlitic steels have been
preliminary overlaid with high-chromium filler materials the minimum heating
temperature is established with regard to the parts made of perlitic steel but
not lower than 100°С.
6.2.10. Welding of parts made of high-chromium steels with parts
made of perlitic steels where the edges have been preliminary overlaid with
high-chromium filler materials is carried out with heating, which necessity and
minimum heating temperature are established with regard to the part made of
high-chromium steel.
6.2.11. Overlaying of corrosion resistant coating on parts (items) made
of carbon and manganese-silicon steels is done without heating.
6.2.12. In case of overlaying of corrosion resistant coating on parts
(items) made of alloyed steels the necessity and minimum heating temperature are established depending on steel grade and thickness of parts being
welded are established pursuant Table 12, and if it does not contain the necessary guidance – pursuant the PED.
Table 12
Minimum heating temperature for overlaying of the first layer of corrosion resistant coating
Steel grade of Type of filler material Nominal thickness of part Minimum heatthe part being
being overlaid, mm
ing temperaoverlaid
ture, oC
20ХМА
Welding tape
Irrespectively of thickness
Coated welding elec- Up to 100 (inclusive)
trodes, wire
Over 100
100
10ХН1М
Up
to
100
(inclusive)
Welding tape
10ГН2МФА
Over 100
50
10ГН2МФЛ
Coated welding elec- Up to 50 (inclusive)
trodes, wire
Over 50
50
15Х2НМФА
Welding tape
Up to 100 (inclusive)
15Х2НМФА-А Coated welding elec- Over 100
50
15ХЗНМФА
trodes, wire
Up to 100 (inclusive)
50
Over 100
100
12Х2МФА
Welding tape, coated Irrespectively of thickness
150
15Х2МФА
welding electrodes,
15Х2МФА-А wire
18Х2МФА
In case of overlaying of two-layer and multi-layer corrosion resistant
coating the heating is carried out only for overlaying of the first layer.
6.2.13. When the parts made of two-ply steel with the basic layer of
carbon and manganese-silicon steels or steels 10ГН2МФА and 10ГН2МФАЛ
the separating and protective overlays are fabricated without heating.
6.2.14. The preliminary and concurrent heating of the parts (items) being welded should be done using electric, gas or other heaters, which provide
for the required heating of metal over whole length (perimeter) of the joint or
all area of overlay (the area sizes are established in the PED).
In case of local heating of branches less than 100 mm in length the
width of the heating zone L should be equal to the branch length, and in case
local heating of bottoms, flanges and plugs it should be established by the
PED.
6.2.15. In case of local heating of cylindrical parts (barrels, pipes,
branches, etc.) with annular welded joints the width of the heating zone L
within which temperature should not be less than the minimum heating temperature indicated in Table 12 and not higher that the maximum temperature
indicated in para. 6.2.2 both sides of the weld axis should be L ≥ DS , where
D and S are the nominal outer diameter and wall thickness of the parts being
welded. The permissible deviations from the above requirement, as well as
minimum sizes of zone L, where the process is carried out with local heating
of other welded joints and overlay is established in the PED but in any case
the width of zone L should not be less than 100 mm.
6.3. Welding of parts made of different structural steel classes.
6.3.1. For fabrication of welded joints of parts made of different structural steel classes, including the preliminary overlaying of edges, the welding
materials pursuant Tables 2, 4, 6 and 8 should be used.
6.3.2. When parts made of austenitic steels are welded with parts
made of carbon and manganese-silicon steels of nominal thickness more than
10 mm the edges of parts made of carbon and manganese-silicon steels
should be preliminary overlaid (except for the cases pursuant the Note 5 to
Table 4); after machining the overlay thickness should be 6 ± 2 mm for manual arc coated electrode welding and argon-arc welding and 9 ±2 mm for
automated hidden arc welding. It is allowed to fabricate joints by manual arc
coated electrode welding and argon-arc welding with the edges as overlaid for
automated hidden arc welding.
6.3.3. In case welding of parts made of austenitic steels with parts
made of alloyed and high-chromium steels with nominal thickness of more
than 6 mm the edges of parts made of alloyed and high-chromium steels
should be preliminary overlaid (except for the cases described in Note 5 to
Table 4); tafter machining he overall thickness of the overlay should be 9+2
mm, the first layer thickness being 3+1 mm.
6.3.4. While making angle, tee-joints and lap welded joints of parts
made of carbon and manganese-silicon steels the necessity of preliminary
overlaying of edges pursuant para. 6.3.2 is determined by the design height of
the angle weld (instead of nominal thickness). For other steel classes the design height of the angle weld at which it is necessary to preliminary overlay
edges is established by the PED.
6.З.5. In case of automated hidden arc welding of parts made of perlitic steels with parts made of high-chromium steels the edges of parts made
of perlitic steels should be preliminary overlaid with coated welding electrodes
intended for welding of parts made of high-chromium steel. The above overlay
should be made not less than in three layers and have the overall thickness
not less than 7 mm after machining.
6.3.6. In case of welding in the assembling conditions of pipes made
of different steel structural classes where there is no preliminary overlay on
edges made at the manufacturing enterprise the special adapting pipes
manufactured in factory conditions should be used. The use of said adapting
pipes should be provided for in the design documentation.
An adapting pipe represents an assembly unit made of two pipe sections welded together, each section being in correspondence, in terms of steel
grades, with the respective pipes to be joined together.
The adapting pipe length is determined by the permissible distance
between welds in accordance with NPI Rules.
6.3.7. When the welds made by austenitic and perlitic filler materials
are crossing the weld to be made with perlitic filler materials should be fabricated first.
6.3.8. The width of weld metal or preliminary overlay surface, made
with welding electrodes ЭА 395/9, ЦТ-10 or welding wire Св-10Х16Н25АМ6,
to be facing water, steam-water and steam coolant environs should not exceed 7 mm.
6.4. Welding of parts made of two-ply steel.
6.4.1. While preparing the parts made of two-ply steel for welding the
clad layer should be removed from the sections adjacent to the edges subject
to welding (on their opening side), as well as from the angle weld locations
except for the cases described in this Subsection.
The width of clad layer zone to be removed should not be less than 5
mm for manual arc coated electrode welding and argon-arc welding, and not
less than 10 mm for automated hidden arc welding. In case of angle and teejoints the clad layer zone to be removed should go beyond the angle weld
boundary not less than the indicated width values.
In case of welded joints which basic layer is made of perlitic steel and
is subject to ultrasonic and/or radiographic inspection before the clad layer is
applied, the width of clad zone to be removed should be such to provide for a
possibility of the above inspection.
6.4.2. While making welded joints with removal of clad layer, first welding of the base layer made of perlitic steel is done and then the clad layer is
welded (overlaid).
6.4.3. Welding of base layer should be done with welding materials
designed for welding of parts made of the base layer steel.
6.4.4. Welding (overlaying) of the clad layer includes fabrication of
separating and protective overlays (Fig. 1).
Fig. 1. Grooving and welded joints of parts made of two-ply steels: 1 - weld; 2
– separating overlay; 3 – protective overlay
6.4.5. The separating overlay should be made with coated welding
electrodes ЦЛ-25/1 or ЗИО-8, welding wire Св-07X25Н13 (for argon-arc
overlaying), welding tape Св-07Х25Н13 in combination with fluxing agent ОФ10 or with welding tape СВ-04Х20Н10Г2Б in combination with fluxing agent
ФЦ-18 (for automated hidden arc overlaying). At this, the sizes of the welded
joint elements should correspond to those indicated on Fig. 1.
In case the weld reinforcement is to be removed the weld reinforcement sizes indicated on Fig. 1 are established by the design organization
upon agreement with the leading material study organization.
6.4.6. The protective overlay should be made in not less than two layers with the following welding (overlaying) materials:
•
in case the welded joint is not subject to heat treatment – with the
welding materials as per para 6.4.5 or coated welding electrodes
ЭА-400/10У, ЭА-400/10Т, ЦТ-26, ЦТ-26М, ЭА-898/21Б, ЦТ-15К,
ЦЛ-25/2, or welding wire Cв-04XI9H11M3, Св-04Х20Н10Г2Б,
Св-08Х19Н10Г2Б (for argon-arc overlaying) or welding tape Cв04XI9H11M3, Св-04Х20Н10Г2Б, Св-08Х19Н10Г2Б in combination with fluxing agents ОФ-10 or ФЦ-18 (for automated hidden
arc overlaying) ;
•
in case the welded joint is subject to heat treatment – with coated
welding electrodes ЭА-898/21Б or ЦТ-15К, or welding wire Св04Х20Н10Г2Б or Св-08Х19Н10Г2Б (for argon-arc overlaying) or
welding tape Св-04Х20Н10Г2Б or Св-08Х19Н10Г2Б in combination with fluxing agents ОФ-10 or ФЦ-18 (for automated hidden
arc overlaying).
For cases specified in the PED it is permitted to fabricate the protective overlay with welding tape Св-04Х20Н10Г2Б in one layer.
6.4.7. The protective and separating overlays to be made by manual
arc coated electrode welding should be fabricated in individual beads of width,
which is not more than three diameters of the welding electrode core in use.
In cases specified in the PED it is permitted to increase the width of the separating overlay beads up to four diameters of the welding electrode core.
6.4.8. The welding of parts with nominal base layer thickness (for angle and tee-joints – with design angle weld height) of up to 10 mm inclusive
for carbon and manganese-silicon steels and up to 6 mm inclusive for alloyed
steels is permitted to do with coated welding electrodes ЭА-855/51 or ЦТ-45,
or with welding wire Св-0ЗХ15Н35Г7М6Б or Св-0ЗХ20Н45М6Г6Б-ВИ (for
argon-arc welding) over all thickness on any side without removal of the clad
layer.
If the clad layer metal does not contain niobium and the welded joint is
not subject to heat treatment, it is permitted to fabricate the base layer with
coated welding electrodes ЭА-395/9 or ЦТ-10, or welding wire Св10Х16Н25АМ6 (for argon-arc welding) up to the level overlapping the clad
layer not less than by 1 mm, and to fabricate the separating and protective
overlays with coated welding electrodes ЭА-400/10У, ЭА-400/10Т, ЦТ-26,
ЦТ-26М or welding wire Cв-04X19H11M3 (for argon-arc overlaying) in not
less than two layers.
6.4.9. It is allowed to fabricate the one-sided welded joints, which are
not accessible for welding on the clad layer side, without removing the clad
layer with preliminary overlaying of edges pursuant Figs. 2 and 3.
Fig.2. Preliminary overlaying of part edges made of two-ply steels with clad
layer which does not contain niobium: 1 – carbon or manganese-silicon steel;
2 – clad layer; 3 – homogeneous overlay made with welding materials as per
Table 4; 4 – alloyed steel; 5 – double overlay made with welding materials as
per Table 4.
Рис.3. Preliminary overlaying of part edges made of two-ply steels with clad
layer which contains niobium: 1 - carbon or manganese-silicon steel; 2 - clad
layer; 3 - homogeneous overlay made with welding materials as per Table 4;
4 – separating bead; 5 - alloyed steel; 6 - double overlay made with welding
materials as per Table 4.
At this, if the clad layer metal contains niobium a separating bead (see
Fig. 3) should be made to avoid a direct contact of the clad layer with the preliminary overlay metal on edges. The separating bead should be fabricated
with coated welding electrodes ЦЛ-25/1 or ЗИО-8, or with welding wire Св07Х25Н13 (for argon-arc overlaying).
Thickness of the first layer and/or total thickness of the preliminary
overlay should meet the requirements of para. 6.3.2, 6.3.3.
6.4.10. After the preliminary overlay as per para. 6.4.10 is complete
the heat treat of parts in the overlay zone is done (if the heat treatment is envisaged by Section 8 and/or the PED) followed by machining.
6.4.11. The welding of parts with overlaid edges should be done with
welding materials in accordance with Table 4
6.4.12. In case of welding of parts made of two-ply steel with the parts
made of perlitic steel the clad layer is removed in accordance with para 6.4.1,
then the welded joint is fabricated with the welding materials designed for
welding of parts made of the corresponding steel grades followed by the restoring of the clad layer or without it.
6.4.13. When the parts made of two-ply steel are welded with those
made of high-chromium steel the clad layer is removed as per para. 6.4.1,
then the welded joint is fabricated with the welding materials designed for
welding of parts made of the corresponding steel grades (with the preliminary
edge overlaying pursuant Table 2 or PED) followed by the restoring of the
clad layer as per para. 6.4.4-6.4.6.
6.4.14. When the parts made of two-ply steel are welded with the parts
made of austenitic steel, the preliminary overlaying is done on their edges as
per para. 6.4.10, and then the welded joint is fabricated with the welding materials in accordance with Table 4.
6.4.15. It is permitted to weld the protective shells as well as nonpressurized parts to the clad layer of the two-ply steel parts without removal of
the clad layer in the angle welds’ locations if the design height of the angle
weld does not exceed 8 mm. In doing so the welding materials indicated in
Tables 3 and 4, designed for the relevant cases, should be used (the clad
layer is considered as austenitic steel).
6.5. Electroslag welding.
6.5.1. Parts made of manganese-silicon and alloyed steels, as well as
of high-chromium steel, should be sent for electroslag welding after complete
heat treatment (normalization or hardening followed by tempering) and parts
made of two-ply steel should be sent for welding having a clad layer made at
a distance sufficient for installation of water-cooled slide blocks and cleats, as
well as for subsequent ultrasonic testing.
6.5.2. The electroslag welding should not be interrupted until the
welded joint is fabricated.
In case of forced termination of the process it is allowed to resume
welding after the section with a shrink hole is removed. In case of welding of
parts made of alloyed steel such section is removed after a preliminary tempering of the completed welded joint section.
In case of welding of parts made of austenitic steel, where the weld
section having a shrink hole has been removed, it is mandatory to carry out
austenization after the completion of the welded joint.
6.5.3. While fabricating annular welded joints of parts made of perlitic
steel, after welding of 20-40% of the perimeter the initial weld section is removed by oxyacetylene, machine or plasma cutting or air-arc gouging. In
case of parts made of alloyed steel the metal temperature in the oxyacetylene
or plasma cutting or air-arc gouging zone should not be less than 200°С. The
cut edges and adjacent weld and base metal surfaces should be cleaned from
spits and dross.
For annular welded joints of parts made of austenitic and highchromium steels the technique and conditions of cutting-out of the initial section are established in the PED.
6.6. Argon-arc welding.
6.6.1. For argon-arc welding the non-consumable tungsten welding
electrodes made of tungsten grades ЭВЛ, ЭВИ-1, ЭВИ-2, ЭВИ-3, ЭВТ-15,
lanthanized tungsten ВЛ or yttrated tungsten СВИ-1 are used as nonconsumable welding electrodes.
6.6.2. In case of welding of backing rings (or “whiskers”) of pipes and
other cylindrical parts made of austenitic steel, high-chromium steel and ironnickel steel the argon (shielding gas mixture) shielding should be arranged for
on the back side of the joint when the first two layers are fabricated (including
in case of combined welding); the shielding is done by gas feed towards the
back side of the weld or inside the product being welded. For parts made of
perlitic steels the gas feed necessity is determined in the PED.
To reduce the gas flow rate it is recommended to install removable
plugs into the items being welded to create a chamber of required volume.
The necessary protection of the weld root before the welding is achieved by
the gas blowing through the chamber in the amount equal 4 to 5 times chamber volume, and during fabrication of the first two weld layers - by gas feed.
7. Overlaying of Corrosion Resistant Coatings
7.1. General requirements.
7.1.1. Overlaying of corrosion resistant coatings should be done in accordance with the PED developed pursuant the requirements of these BP and
drawings.
The PED for overlaying of corrosion resistant coatings should establish:
•
steel grades of items (parts) being overlaid;
•
characteristics of coatings as regards their types and number of overlaid layers;
•
overlaying technique;
•
qualification of welders;
•
•
•
•
•
•
•
welding (overlaying) equipment in use;
grades (combinations of grades) of welding (overlaying) materials;
assortment of filler materials;
requirements to preparation of base metal surfaces for overlaying;
type and polarity of welding current;
overlaying spatial positions and modes;
magnitude and direction of the welding electrode displacement regarding the vertical line to the surface of a product being overlaid (for bodies of revolution);
•
necessity, techniques and modes of preliminary and concurrent heating;
•
sequence of beads and layers fabrication;
•
grinding of overlaid layer surface and removal or welding of craters
(for welding tape overlaying);
•
keeping conditions for the overlaid items since overlaying completion
until the heat treatment;
•
necessity, types and procedures for machining of overlaid coatings;
•
techniques and scope of overlaid coating inspection;
•
other necessary data along with all process and control operations.
Exemplary overlaying modes for certain corrosion resistant coatings
are given in the Reference Attachment 2.
7.1.2. Corrosion resistant coatings are divided into homogeneous and
double ones.
A homogeneous coating is the coating fabricated with welding (overlaying) materials of one grade (one combination of grades of filler materials
and fluxing agents or shielding gases) over all thickness irrespectively of
number of layers being overlaid.
A double corrosion resistant coating is the coating which first layer is
overlaid with welding (overlaying) materials of the same grade (of one combination of grades) and second and subsequent layers are made with the welding (overlaying) materials of another grade (another combination of grades).
N o t e . A layer of the overlaid corrosion resistant coating is a part of the coating formed by a row of beads located at the same level with regard to the
base metal.
7.1.3. Homogeneous corrosion resistant coatings are divided into single-layer and multi-layer ones.
A homogeneous single-layer coating is overlaid in one layer.
A homogeneous multi-layer coating is overlaid in not less than two
layers.
7.1.4. Double corrosion resistant coatings are divided into two-layer
and multi-layer ones.
A double two-layer coating is overlaid in two layers.
A double multi-layer coating is overlaid in more than two layers.
7.1.5. Homogeneous multi-layer coatings made with filler materials,
which are not alloyed with niobium, are overlaid only on parts (items), which
are not subject to heat treatment.
7.1.6. Thickness of a homogeneous single-layer coating should be
4+−21
mm, and of a homogeneous multi-layer coating – not less than 5 mm
(after final machining).
N o t e . Thickness of a corrosion resistant coating (or its first layer) should
mean a distance from the outer surface of the coating (from the first layer surface) up to its fusion zone with the base metal.
7.1.7. Thickness of the first layer of a double coating before the over+2
laying of the second layer should be 3 −1 mm. The total thickness of a double
two-layer coating should not be less than 5 mm, and that of a multi-layer
should not be less than 7 mm (after the final machining). At this, the total
(cumulative) thickness should exceed the maximum measured thickness of
the first layer not less than by 2 mm (after the final machining).
7.1.8. The maximum cumulative thickness of a coating should not exceed values established in the product drawings (provided the drawing contain corresponding requirements).
7.1.9. A layer thickness measurement procedure is established in the
PED.
7.2. Overlaying process.
7.2.1. All parts (items) prepared for overlaying of a corrosion resistant
coating should be marked and/or supplied with the documentation confirming
that they have been accepted by the Technical Control Service. The marking
technique is determined by the PED issued by the manufacturing enterprise
(assembling organization).
7.2.2. Before overlaying the surfaces ground during the overlaying
preparation process are subject to re-grinding and/or degreasing, as required
by the PED.
7.2.3. The assembly units with welded joints made by electroslag
welding should be subjected to the complete heat treatment before overlaying.
7.2.4. The corrosion resistant coatings should be fabricated using
automated hidden arc tape overlaying with one or two tape welding electrodes
(the recommended basic technique), manual arc coated electrode overlaying
or argon-arc overlaying.
Automated hidden arc wire overlaying is permitted in the cases below
pursuant the instructions of Table 5:
•
for horizontal overlaying of inner surfaces of nozzles where the nozzle
axis is vertical and the first (lower) annular bead of each layer is made
by arc coated electrode overlaying followed by automated overlaying,
the wire electrode angle of inclination is not more than 45o regarding
the vertical;
•
where the additional filler wire of the same grade that the basic welding wire is introduced into the arc.
7.2.5 Corrosion resistant coatings should be fabricated with the welding (overlaying) materials indicated in Table 5.
7.2.6. While fabricating corrosion resistant coatings the necessity and
temperature of preliminary and concurrent heating are set in accordance with
the guidance of Subsection 6.2.
7.2.7. Manual arc coated electrode overlaying should be done with
beads of the width which is not more than three diameters of the welding electrodes in use. It is allowed to increase the width of individual beads up to four
diameters of the welding electrode core provided only one bead will be fabricated or the number of such beads will not exceed 5% of the total number of
beads fabricated on the overlaid product.
7.2.8. In case of automated hidden arc tape overlaying each subsequent bead of the layer being fabricated should overlap the preceding one not
less than 5 mm (in width). In case of manual hidden arc tape overlaying each
subsequent bead should overlap the preceding one not less than 1/3 of its
width.
7.2.9. During overlaying process, after completion of each subsequent
bead its surface and adjacent surfaces of base and/or overlaid metal should
be thoroughly cleaned from slag, metal spay and other soiling and visually
inspected (by the welder) to find out whether defects are present. In case
where defects (cracks, scabbing, undercuts, bulging) are present they should
be eliminated before the next bead is made.
In case of overlaying using a welding tape all craters (shrink holes)
formed when the overlaying process is interrupted should be also eliminated
(grinding using an abrasive tool to provide for a smooth transition to the previously overlaid metal). The overlaid layer surface should be free of falls and
shelves between beads more than 2 mm deep (high). Falls and shelves in
excess of the above depth (height) should be ground to achieve the indicated
value and provide a smooth transition (not more than 1:10 inclination) to the
adjacent overlay surface or they should be welded by coated welding electrodes or argon-arc overlaying. At this, after the above operations are completed the requirements of paras.7.6.1 and 7.1.7 should be met.
7.2.10. After each layer is completed its surface should be additionally
ground (if necessary) and visually inspected over the whole area.
7.2.11. Each subsequent layer should be made only after the above
operations are completed (over the whole area) except for large-size items
which overlaid surfaces are located in different spatial position.
7.2.12. It is recommended to overlay the first layer without interruptions.
The overlaying procedures for the second and subsequent layers
should provide for decrease in temperature of the previously made layer down
100oC (by the arc approach) in the area where the next bead is to be fabricated.
In case of automated overlaying of the second and subsequent layers
with welding tape Св-04Х20Н10Г2Б it is allowed to increase the indicated
temperature up to 250°С provided it is monitored periodically at a distance of
150-200 mm from the arc moving forward (ahead of the arc along the axis of
bead being overlaid). The monitoring frequency is established by the PED
depending on the size of items being overlaid.
7.2.13. If there is an non-permissible roughness (pockets between
beads, etc.) the surface of fabricated corrosion resistant coating is machined
with an abrasive wheel or by cutting. Depending on the number and locations
of the rough areas the surface is machined locally or totally. The coating
thickness after machining should satisfy the requirements of paras. 7.1.6 и
7.1.7.
N o t e . It is allowed to eliminate non-permissible falls by welding with the
welding materials used for the upper layer of the corresponding coating provided the machining is done within this layer.
7.2.14. In cases specified in the design documentation it is allowed to
overlay a corrosion resistant coating on items made of austenitic steels to protect them from corrosion damage. The above coating is fabricated with coated
welding electrodes ЭА-855/51 or welding tape Св-0ЗХ15НЗ5Г7М6Б in combination with fluxing agent ОФ-10 (for automated hidden arc overlaying) or
welding wire Св-0ЗХ15НЗ5Г7М6Б (for argon-arc overlaying). In this regard
the number and dimensions of layers are established in the PED.
8. Heat Treatment
8.1. The necessity and type of heat treatment of welded joints and
overlaid items are established in accordance with this BP and indicated in
drawings.
8.2. Heat treatment of welded joints and overlaid items should be done
in accordance with the PED developed pursuant the requirements and guidance this BP and drawings.
The PED for heat treatment should indicate:
•
name and codes of welded (overlaid) items;
•
grades of base materials of welded or overlaid items;
•
characteristics of overlays (preliminary on edges, overlaid corrosion
resistant coating along with its type, etc.);
•
minimum nominal thickness of welded (overlaid) parts (assembly
units) which determines the necessity of heat treatment of welded
joints or overlaid parts (depending on the base metal grade);
•
keeping condition for welded joints and overlaid items from the end of
welding (overlaying) till the beginning of heat treatment (whether cooling is permitted without a “thermal rest” or after it, permissible cooling
temperature and duration, retaining of a given heating temperature,
immediate placement into the hot furnace, etc.);
•
types of heat treatment along with a description of the sequence of its
individual stages (including preliminary, intermediate and final tempering);
•
heat treatment techniques along with a description of the heat treatment equipment to be used;
•
heat treatment modes on its each stage (furnace temperature during
loading; heating rate; temperature as well as their duration depending
•
•
•
on nominal thickness ranges within the welded joint or overlay zone;
conditions, environs or cooling rate, etc.);
techniques and procedures for monitoring of temperature modes (including the thermocouple thermometer number, location and fixing
methods;
permissible number and total duration of intermediate and final tempering of welded joints and overlaid items (parts);
other necessary data along with descriptions of all process and control
operations.
8.3. Welded joints should be kept in conditions as per Table 13 between the end of welding and the beginning of heat treatment in cases where
the “thermal rest” is not required.
8.4. In case of “thermal rest” the welded joints should be cooled down
to not less than 5°С. Time is not limited from the “thermal rest” till heat treatment.
8.5. Table 14 shows the minimum temperature and duration of the
“thermal rest”.
The maximum temperature of the “thermal rest” should not exceed the
minimum one more than 100°С.
In case of local “thermal rest” the heating zone width should be the
same as the one for the preliminary and concurrent heating pursuant para.
6.2.13.
8.6. For welded joints made of different steel grades the minimum
“thermal rest” temperature is assumed with regard to the steel grade for which
a higher temperature value is set.
8.7. In cases not covered by Table 13 the keeping conditions within
the period of time between the end of welding and the beginning of heat
treatment are established in the PED.
8.8. The time interval between the end of the prelimnary edge overlaying of parts made of steel grades 12Х2МФА, 15Х2МФА, 15Х2МФА-А,
18Х2МФА and the beginning of the heat treatment should not exceed 20
days, and in other cases it should not exceed the time limits set in the PED.
Before the heat treatment the metal temperature of parts with overlaid
edges in all cases should be not less than 5°С.
8.9. The time interval between the end of the overlaying of a corrosion
resistant coating on items made of steel grades 12Х2МФА, 15Х2МФА,
15Х2МФА-А, 15ХЗНМФА, 15ХЗНМФА-А, 10XH1M and the beginning of the
heat treatment should not exceed 30 days, and in other cases it should not
exceed the time limit set in the PED. Within the indicated time interval the
metal temperature of parts with overlaid edges in all cases should be not less
than 5°С.
8.10. The following heat treatment techniques are applied during
manufacturing (assembling) of welded joints:
•
tempering;
•
complete heat treatment (normalizing or hardening followed by tempering);
•
austenization.
Table 13
Keeping conditions for welded joints between the end of welding and the beginning of heat treatment
Steel grades of welded
parts
Nominal wall
thickness of
welded parts,
mm
Minimum permissible temperature of
metal in the
weld area, °С
Maximum permissible time interval,
h
10ГН2МФА, 10ГН2МФЛ,
15ГНМФА
Over 50
70
Not regulated
20ХМ, 20ХМЛ, 20ХМА
Independently
of thickness
Not regulated
72
10X2M
Over 30
100
Not regulated
12Х1МФ, 15Х1МФ
Over 6
Not regulated
72
05X12H2M
Over 30
80
Not regulated
15Х2НМФА,
15Х2НМФА-А,
15ХЗНМФА,
15ХЗНМФА-А
Independently
of thickness
150
The same
12Х11В2МФ
Over 3
Not regulated
72
06Х12НЗД
Over 10
100
Not regulated
12А2МФА
Independently
of thickness
175
The same
15Х2МФА, 15Х2МФА-А
The same
200
"
18Х2МФА
"
300
"
Table 14
“Thermal rest” modes for butt welded joints fabricated by arc or electronbeam welding
Steel grades of
welded parts
Nominal wall thickness of welded
parts, mm
“Thermal rest” mode
Minimum temperature,
Minimum duration, h
°С
10ГН2МФА,
10ГН2МФЛ
Over 50 up to 110
(inclusive)
150
8
15ГНМФА
Over 110
150
18
10X2M, 05XI2H2M
Over 30
100
8
12Х1МФ
Over 6
130
8
15Х1МФ
Over 6
150
10
06Х12НЗД,
15ХЗНМФА,
15ХЗНМФА-А
Independently of
thickness
150
12
08Х13
Over 10
100
8
The welded joints of parts made of perlitic or high-chromium steels
fabricated by arc or electron-beam welding are subjected to tempering.
The welded joints of parts made of perlitic or high-chromium steels
fabricated by electroslag welding are subjected to complete heat treatment.
The welded joints of parts made of austenitic steel are subjected to
austenization.
8.11. Tempering may be intermediate and final.
The intermediate tempering is carried out after fabrication of individual
welded joints (reinforcement overlays) if such joints (overlays) are eventually
to be subjected to re-tempering (once or more times).
The final tempering is done after all intended welding (overlaying) and
heat treatment operations have been completed for the given welded or overlaid item as well as after the defects in welded joints (overlays) have been
eliminated by welding (overlaying).
Besides, the preliminary tempering is carried out after the preliminary
overlaying of edges, as well as after complete heat treatment of welded joints
made by electroslag welding.
8.12. The nominal temperature of intermediate tempering should be
not less than 15°С lower than the nominal temperature of the final tempering.
8.13. In all cases the nominal temperature of final tempering of welded
joints and overlaid parts should not exceed the nominal tempering temperature of the base metal when it is subjected to complete heat treatment under
modes established by a standard or specification for semi-finished products
made of the corresponding steel grade.
8.14. The necessity and temperature of tempering for welded joints of
parts made perlitic or high-chromium steels fabricated using arc or electronbeam welding are established in accordance with Table 15 depending on a
steel grade and nominal thickness of parts being welded. If Table 15 does not
provide for the corresponding guidance the necessity and tempering temperature are set pursuant the PED.
In cases specified in the PED it is permitted to temper welded joints for
which Table 15 does not indicate the necessity of tempering due to the nominal thickness of the welded parts.
8.15. It is mandatory to temper he welded joints of parts made of different steel grades and/or of different nominal thickness in the following
cases:
•
if, pursuant the guidance of Table 15, the steel grade and nominal
thickness of each of the welded parts condition the necessity to temper the welded joint;
•
if, pursuant the guidance of Table 15 the steel grade of at least one of
the welded parts conditions the necessity to temper the welded joint
irrespectively of the nominal thickness of the parts.
In other cases the necessity to temper the indicated welded joints is
established in accordance with the PED.
8.16. Tempering temperature for the parts made of different steel
grades for which Table 15 provides different tempering temperatures is established by the PED. At this the nominal tempering temperatures should be
within the range of the nominal temperatures, which are determined pursuant
Table 15 guidance for tempering of welded joints made of corresponding steel
grades and should not satisfy the requirements of Subsections 8.12 и 8.13.
Таблица 15
Tempering temperature of welded joints fabricated using arc or electron-beam
welding
Steel grades of
parts being
welded
Nominal thickness of welded
parts, mm
Ст3сп5, 10, 15, Up to 36 (in15Л, 20, 20Л clusive)
Tempering temperature, °С
intermediate
final
nominal
limiting
nominal
limiting
deviations
deviations
-
-
-
-
610
± 20
630
±20
-
-
-
-
620
±20
640
+20
-10
-
-
-
-
620
±10
640
+10
-15
-
-
-
-
630
±15
650
±15
-
-
-
-
Over 10
620
±10
650
±10
Irrespectively
of thickness
620
±10
650
±10
-
-
650
-
±10
-
Over 25
640
±15
660
±15
12Х2МФА,
15Х2МФА,
15Х2МФА-А,
18Х2МФА
Irrespectively
of thickness
655
±10
670
±10
05Х12Н2М
20ХМА, 20ХМ,
20ХМЛ
The same
"
670
.115
670
700
±20
±15
Over 36
20К, 22К, 25Л
Up to 36 (inclusive)
Over 36
06Х12НЗД
Up to 10 (inclusive)
Over 10
15ГС, 16ГС,
Up to 30 (in20ГСЛ, 09Г2С, clusive)
10ХСНД,
10XH1М
Over 30
10ГН2МФА.
10ГН2МФАЛ
15Х2НМФА,
15Х2НМФА-А,
15ХЗНМФА,
15ХЗНМФА-А
07Х16Н4Б
16ГНМА,
15ГНМФА
Up to 10 (inclusive)
The same
Up to 25
12MX, I2XM,
I5XM
-
-
-
-
Over 10
Up to 6 (inclusive)
690
-
±20
-
710
-
±20
-
Over 6
12ХМФ, 20ХМФЛ Up to 6 (inclusive)
690
-
±20
-
710
-
±20
-
Over 6
715
±15
730
±120
15Х1М1Ф,
15Х1М1ФЛ
Up to 6 (inclusive)
-
-
-
-
12Х11В2МФ
Over 6
Up to 3 (inclusive)
725
-
±15
-
740
-
±15
-
Over 3
730
±15
750
±15
10X2M,
12Х2М1Л,
08Х13, 12Х13
Up to 10 (inclusive)
Notes:
1. For butt welded joints the nominal thickness of welded parts should mean
their nominal thickness in the zone adjacent to the weld.
2. In case of the local heat treatment (tempering) of welded joints of parts
made of steel grades СтЗсп5, 10, 15, 15Л, 20, 20Л. 20К, 22К. 25Л, 15ГС,
16ГС, 20ГСА, 09Г2С. 10ХСНД, 10XH1M, 10ГН2МФА. 10ГН2МФЛ,
16ГНМА, 15ГНМФА, 12MX, 12Х, 15Х, 20ХМЛ, 12Х1МФ, 20ХМФЛ,
15Х1М1Ф and 15Х1М1ФЛ, upon agreement with the leading material
study organization, it is permitted to increase the total limiting deviations
by up to 40°С with regard to the nominal tempering temperatures indicated in the Table.
3. Upon agreement with the leading material study organization it is permitted not to carry out high-temperature tempering of welded joints of steel
grades 10ХСНД and 10XH1M having the nominal wall thickness of up to
40 mm inclusive.
4. Where it is provided for by the PED it is allowed to increase the upper limit
of the final tempering temperature up to 660°С for welded joints of parts
made of steel grades Ст3сп5 and 20.
5. Where it is provided for by the PED it is allowed to carry out the intermediate tempering of welded joints of parts made of steel grades 12X2MФА
and 15Х2МФА at temperature 650±10°С.
8.17. The necessity to temper parts after the preliminary overlaying of
edges is determined using Table 15 the same way as for the welded joints of
these parts without overlaid edges. At this, the parts which edges have been
overlaid with austenitic filler materials are subjected to the preliminary tempering and the parts which edges have been overlaid with high-chromium filler
materials are subjected to the intermediate tempering.
8.18. Parts with an overlaid corrosion resistant coating are subjected
to tempering in cases specified in the PED. In doing so, the tempering tem-
perature is established as per Table 15 the same way as for the welded joints
of parts made of the same steel grade that the overlaid items are.
It is recommended to combine tempering of items with corrosion resistant coating and tempering of welded joints.
8.19. The necessity and tempering temperature of welded joints made
of two-ply steels where the base layer is welded using perlitic filler materials
are determined by Table 15 without considering the plating layer thickness.
8.20. The welded joints of parts made of perlitic or high-chromium
steels with parts made of austenitic steel, as well as those made of two-ply
steel, fabricated with austenitic filler materials should not be subjected to heat
treatment except for the cases specified in the drawings and/or PED.
8.21. For welded joints of parts made of austenitic steel with parts
made of perlitic or high-chromium steels (except joints of Iн and IIн Categories), parts made of two-ply steel and parts (items) having overlaid corrosion
resistant coating the number of final tempering times should not exceed five.
8.22. The arc or electron-beam welded joints of parts made of austenitic steel intended for operation at the temperature of up to 360°С (irrespectively of thickness of welded parts), and with nominal thickness of the welded
parts of up to 10 mm inclusive and also intended for operation at temperatures above 360°С should not be subjected to heat treatment except for the
cases specified in the drawings and/or PED.
8.23. The arc or electron-beam welded joints of parts made of austenitic steel with nominal thickness of more than 10 mm intended for operation at
temperatures above 450°С (steel grades 08X18H10T, 12X18H9T,
12X18H10T), above 500°С (steel grades 08X18H10, 09Х18Н9, 10X18H9,
12Х18Н9), above 560°С (steel grade 08X16H11M3) are subject to austenization at temperature 1000±(20÷30)°С except for the cases specified upon
agreement with the leading material study organization and indicated in the
drawings and PED.
When it is impossible to austenize the above welded joints the following technology is allowed subject to agreement with the leading material study
organization:
•
Preliminary overlaying of edges of parts with coated welding electrodes A-1 (A-1T) or А-2 (А-2Т) (overlay thickness should meet the
requirements of para. 6.3.2);
•
Austenization of parts with overlaid edges at 1000 ± (20÷30)°С;
•
Machining of overlaid edges;
•
Fabrication of a welded joint with welding materials as per Table 7
without subsequent heat treatment.
The above technology should be specified in the drawings and incorporated into the PED.
Necessity, type and modes of heat treatment of welded joints of Iн and
IIн Categories of another steel grades as well as the above steels at lower
temperatures are determined as agreed with the interagency leading material
study organization and specified in the drawings and PED.
8.24. After electroslag welding, carried out with heating, of parts made
of perlitic steel the welded joint should be preliminary tempered without cooling down the weld metal and weld region of the base metal below the mini-
mum heating temperature applied during welding (except for cases specified
in the PED). At this, the preliminary tempering temperature should not be
lower than the final tempering temperature as determined in Table 15 depending on a steel grade being welded.
8.25. All electroslag welded joints of parts made of perlitic or highchromium steels, irrespectively of whether the preliminary tempering was
done or not, should be subjected to complete heat treatment under modes
established for the base metal.
It is allowed to carry out the complete heat treatment of welded joints
made of steel grades 10ГН2МФА and 10ГН2МФАЛ fabricated with coated
welding electrodes ЦЛ-59.
8.26. All electroslag welded joints of parts made of austenitic steel
should be subjected to austenization under the modes established for the
base metal.
8.27. In case of the complete heat treatment of any welded joints, as
well as in case of tempering or austenization of longitudinal, meridian, chord
and annular welded joints and all overlaid parts, the welded (overlaid) items
should be placed in the furnace in one piece.
In case of tempering and austenization of annular welded joints of
pipes and other cylindrical parts the local heat treatment is permitted provided
it is specified in the drawings and/or PED.
8.28. In case of the local heat treatment of welded joints the total area
of the controlled heating of metal consists of the basic and adjacent zones
and should include the weld and adjacent sections of base metal at a distance
L, which minimum values are given in Table 16 depending on the nominal diameters and thickness of the welded parts.
Table 16
Width of the controlled heating zone of the base metal L1, mm
Nominal sizes of welded parts in the weld adjacent sections
Minimum distance, mm
Outer diameter, mm
Thickness, mm
Up to 200 (inclusive)
Up to 20 (inclusive)
40
Over 20
50
Over 200 up to 300 (inclusive)
Up to 25 (inclusive)
60
Over 25
70
Over 300 up to 500 (inclusive)
Up to 30 (inclusive)
90
Over 30
120
Over 500 up to 1000
(inclusive)
Up to 50 (inclusive)
180
Over 50 до 100 (inclusive)
250
Over 100
300
N o t e . When the outer diameter of welded parts is more than 1000 mm the
value of L1 is established by the PED.
The major controlled heating zone includes the weld and adjacent
base metal sections at distances equal to the nominal thickness of the welded
parts where the part thickness is up to 50 mm (inclusive), and where the part
thickness is greater at the distance of 50 mm. During hold-up period the metal
temperature within the major zone should correspond to the preset tempering
(austenization) temperature considering the established allowances.
The additional controlled heating zone includes base metal sections of
the general area, which are not included into the major zone. During the holdup period it is permitted to reduce the metal temperature comparing with the
preset tempering (austenization) temperature, but not more than by 50°С regarding the minimum permissible temperature (considering the negative allowance), within the additional zone.
8.29. After welding of sheets or other semi-finished products (including
those with overlaid corrosion resistant coating) to fabricate shaped parts by
deformation techniques (expansion, punching, bending, etc.) the welded joints
to be heat treated should be subjected to such operation before the deformation process. For hot deformation it is permitted not to carry out the heat
treatment in cases specified in the PED.
8.30. In case of heat treatment of reference welded joints it is permitted not to carry out all process heating up to the temperature of 550°С for
carbon and manganese-silicon steels and up to the temperature of 450°С for
other steel grades (including heating in the course of welding and the “thermal
rest”), which are conducted during manufacturing (assembling) of industrial
welded items before heat treatment (tempering, hardening, normalizing) as
well as all types of tempering (including preliminary tempering) carried out be-
fore normalizing or hardening. Irrespectively of whether the above process
heating and tempering, carried out before normalizing or hardening, were
done or not the reference specimens’ testing results are true for the similar
industrial welded joints as those subject to heating and tempering as those
that are not.
8.31. The furnace temperature at the moment of a welded item loading
for heat treatment should differ from the temperature of metal of the item subject to heat treatment but not more than 300°С.
9. Elimination of Defects
9.1. All defects (non-permissible deviations from the standards established by the RFI) revealed in welded joints and overlaid items in the course
of non-destructive testing (including defects in the preliminary overlay of
edges) are subject to elimination.
9.2. The defective sections should be eliminated in accordance with
the PED for elimination of type defects, which was developed pursuant the
requirements of this BP and RFI.
9.3. The surface defects should be removed by machining to provide
smooth transitions in the locations of falls (using abrasive tools, cutting or
punching followed by grinding).
9.4. Elimination of defects without subsequent welding of their fall locations is permitted for:
•
welded joints – when in location of the maximum fall the remaining
weld and base metal thickness is not less than the design part (assembly unit) thickness in the weld zone but not less than 75% of its
nominal thickness;
•
for overlaid surfaces – when the remaining thickness of the overlay is
not less than the minimum permissible pursuant para. 7.1.6 and 7.1.7,
and in cases which are not specified in Section 7 it is not less then the
minimum permissible one pursuant the drawing.
9.5. The defects with welding of falls in welded joints made by arc and
electron-beam welding and subject to heat treatment should be eliminated
after tempering of the welded joint (preliminary, intermediate or final).
It is permitted to eliminate defects before tempering of welded joints if
their cooling down to the temperature of 5°С after welding is permitted by Table 14 and the PED.
9.6. The internal defects (defective regions) should be eliminated by
machining (an abrasive tool, by cutting or punching followed by grinding).
It is allowed to eliminate defects by air-arc or plasma-arc gouging followed by machining of the fall surface:
•
until the gouging traces are completely removed – on fall surfaces of
welding joints of parts made of carbon or manganese-silicon steels;
•
with removal of not less 1 mm layer of metal - on fall surfaces of welding joints of parts made of alloyed steel with the guaranteed yield
stress of not more than 315 MPa at 20°С or of austenitic steel;
•
with removal of not less 2 mm layer of metal - on fall surfaces of welding joints of parts made of alloyed steel with the guaranteed yield
stress of more than 315 MPa at 20°С or of high-chromium steel.
9.7. Shape and sizes of prepared falls should provide for their welding
over the whole volume.
The sizes of falls subject to welding are not limited. At this, the falls
made in the weld metal (overlaid metal) may intrude into the base metal.
9.8. The falls should be eliminated by one of the welding (overlaying)
techniques allowed by para 6.1.2 for fabrication of the welded joints (overlaid
layers) to be corrected using the corresponding welding (overlaying) materials.
9.9. While eliminating the defects all regulations of this BP, which relate to fabrication of the welded joints (overlaid items) to be corrected including preliminary and concurrent (in the course of welding (overlaying) heating
and subsequent heat treatment.
In individual cases, upon agreement with the leading material study
organization) it is permitted to weld falls without heating or subsequent heat
treatment (for welded joints and overlaid items subject to heat treatment).
9.10. The defects in welded joints fabricated by electroslag welding
should be eliminated by arc welding only after the complete heat treatment
(for welded joints of parts made of perlitic or high-chromium steels) or after
austenization (for welded joints of parts made of austenitic steel).
It is permitted to apply the following technology while eliminating defects in the welded joints of parts made of alloyed steel subject to shaping:
•
normalizing (hardening) and subsequent tempering of an assembly
unit with the welded joint made by electroslag welding;
•
cutting-out of defects;
•
welding of falls with carbon filler materials;
•
shaping of the assembly unit along with heating up to the given temperature;
•
normalization (hardening) and subsequent tempering of the item;
•
complete removal of metal overlaid with carbon filler materials;
•
welding of falls with corresponding alloyed filler materials;
•
tempering of the corrected welded joint.
The set of above operations is considered as one corrective measure.
9.11. Correction of assembly units (items) with defective tubular butt
welded joints is permitted to carry out by cutting-out of the defective welded
joint followed by welding of an insert (pipe section). The insert sizes are determined by the requirements to the distance between neighboring annular
welds as per NFI Rules, Subsection 2.4. In this case both welded joints fabricated are considered uncorrected.
9.12. In cases specified in the PED the correction of defective welded
joints is permitted by the complete removal of the weld followed by preparation of edges using machining and fabricating the welded joint anew. In this
case the new welded joint is considered uncorrected.
9.13. Elimination of defects on one and the same section of a welded
joint or overlaid part is permitted only for three times. At this, the corrected
section should mean a rectangle of a lest area, which fits the fall subject to
welding, and the adjacent surfaces at a distance equal to three-time width of
the said rectangle (Fig. 4).
Fig. 4. The determining of sizes of the section to be corrected (aвcd is the
rectangle of the least area, which fits the fall; n is the rectangle width; ABCD
is the section to be corrected)
The issue concerning the correction of defects on one and the same
section of the welded joints (overlaid part) in excess of three times should be
resolved subject to an agreement with the leading material study organization
and Regional Office of Gosatomenergonadzor of the USSR.
9.14. The following provisions should be followed when the defects
are eliminated in the course of fabricating of welded joints (overlaying parts):
•
if crack ar detected the welding (overlaying) should be terminated and
resumed only after the cracks are eliminated and crack re-currence
prevention measures are taken;
•
if the backing ring burn-through is detected the tubular welded joints
inaccessible for welding on their inner side should be completely removed and fabricated anew (provided it is impossible to eliminate the
defect without cutting);
•
the number of corrections of the weld root on one and the same section should not exceed three;
•
the number of corrections (except for those in the weld root) is not limited and considered in case of fall depth within the nominal thickness
of two weld layers;
•
the number of corrections on one and the same section of the weld
should not exceed three if the fall depths exceeds the nominal thickness of two weld layers.
9.15. The number of recorded corrections of defects during welded
joint fabrication and in the completed welded joint is not summed up (accounted for separately).
10. Marking of Welded Joints and Overlaid Parts (Items)
10.1. The welded joints and overlaid parts (items) should bear stamps
identifying the name of welder (welders) who did the welding or overlaying.
The stamping depth and size are established in the PED basing of the design
documentation requirements.
It is allowed to use other marking techniques instead of stamping provided they ensure marking durability during operation and do not reduce quality and reliability of welded (overlaid) items.
10.2. Stamps (marking) should be applied on the outer side of the
welded joints at a distance of 30 to 50 mm from the edge of the weld reinforcement. At this, in case longitudinal and other open welded joints the
stamps should be applied at a distance of 100 to 200 mm from the weld end.
10.3. Each welded joint should bear all stamps of welders participated
in its fabrication. At this, before the stamp of the welder who preliminary overlaid the edges should be the additional stamp “H” and the additional stamp “K”
should be placed before the stamp of the welder who fabricated the weld root
(root layer). If the welded joint over its cross-section is fabricated by one
welder the above stamps are not applied.
If a welder fabricated only an individual section of the welded joint
his/her stamp should be applied in the middle of the section he/she did considering the guidance of Subsection 10.2.
10.4. If all welded joints of the item have been made by one welder it
is permitted not to stamp (mark) each welded joint. In this case the welder’s
stamp is applied near the manufacturer’s label or on another free area of the
item (or welded unit) and the stamp location is embodied into a visible frame,
which is made with unwashable paint (the latter does not cover the surfaces
of items to be in contact with the coolant).
10.5. In case of parts (items) with an overlaid corrosion resistant coating the welders’ stamps (marks) should be applied on a free section of the
item on the part opposite to the overlaid one.
10.6. In case the stamps (marks) are to be eventually removed by machining they should be restored in the same locations.
10.7. In individual cases, as specified in the design documentation,
where the stamping (marking) can degrade quality and reliability of the
welded items, as well as where it is impossible to preserve stamps (marks)
during operation, the equipment or pipeline certificate should be supplemented with rough drawings (schematic views) of the item to indicate the locations of unmarked welded joints and stamps of welders who did the welding
(overlaying).
11. Safety Requirements
11.1. The sanitary and hygienic conditions at the welding and overlaying stations, as regards to the industrial premises, equipment, processes,
tooling, district heating, ventilation and lighting, should satisfy the Sanitary
Rules for Welding, Overlaying and Cutting of Metal approved by the Ministry
of Public Health of the USSR.
11.2. While conducting welding operations it is required to follow the
Unified Fire Safety Rules for Industrial Enterprises approved by the Ministry of
Inferior of the USSR and the Rules for Technical Operation of Consumers’
Power Installations and Safety Rules for Operation of Consumers’ Power Installations approved by the Ministry for Energy of the USSR.
11.3. While conducting the heating and heat treatment the requirements of rules indicated in Subsection 11.2 should be followed along with the
Rules for Safety-at-Work and Industrial Hygiene for Heat Treatment of Metal
approved by the Central Committee of Trade Unions of the Machine Building
Workers.
11.4. While conducting operations related to welding and overlaying of
the equipment and pipelines the requirements of the Hygienic Standards and
Rules for Limitation of Vibration at Work Places and Hygienic Standards for
Sound Levels at Work Places, approved by the Ministry of Public Health of
the USSR, should be met.
11.5. Vibration parameters at the work places should be within the limits established by the Hygienic Standards and Rules for Operations with
Tools, Mechanisms and Equipment Producing Vibration Transmitted Hands of
Workers approved by the Ministry of Public Health of the USSR.
11.6. Welding operations where degreasing liquids are used should be
conducted upon a special permit issued by a representative of the fire safety
unit and a person responsible for welding operations at a given working bay.
11.7. In case of welding of parts with preliminary and concurrent heating the following safety precaution measures should be taken: the heated
parts should be covered by a heat isolating material, the welded sections being left open only.
11.8. The administration of enterprise conducting welding operations
should arrange for development of the corresponding safety procedures and
for control over how they are followed.
The procedures should be located at the relevant work places.
11.9. The administration of enterprise conducting welding (overlaying)
operations should arrange for a periodic briefings and testing of safety-atwork knowledge of workers an engineering and technical personnel at least
once in the quarter of a year.
An unscheduled briefing is conducted if a worker has violated safetyat-work requirements.
11.10. The work permit for newly employed or transferred to another
job welders (operators) is issued only after they are briefed and their knowledge in work safety is tested, the results being recorded in a special log.
12. Requirements to Structural Shapes of Welded Joints
12.1. The major recommended types of welded joints with the indication of the welding techniques applied, nominal thickness of parts being
welded and the structural elements of prepared edges and fabricated welds
are given in the recommended Attachment 3.
Upon agreement with the leading material study organization it is permitted to apply the welded joints not specified in Attachment 3 provided they
meet the RFI requirements.
12.2. The major recommended types of welded joints of parts made of
perlitic and high chromium steels are given in Tables ПЗ.1 - ПЗ.19, П3.21-ПЗ24, ПЗ.ЗО-ПЗ.32, П3.34, ПЗ.36, ПЗ.38-ПЗ.41, ПЗ.51-П3.54 – for butt rectilinear and annular welded joints with inner diameter of joined parts over 750
mm; in Tables ПЗ.17, П3.20-П3.23, П3.25-П3.28, П3.30, П3.32, ПЗ.34,
ПЗ.36, П3.38-П3.40, П3.42-П3.46, ПЗ.48, П3.49 – for butt welded joints with
inner diameter of joined parts of up to 750 mm; in Tables П3.55-П3.65 – for
angle, tee-joint and edge welding joints.
12.3. The major recommended types of welded joints of parts made of
austenitic and iron-nickel steels are given in:
Tables П3.1-П3.7, ПЗ.11-ПЗ.19, ПЗ.22, ПЗ.29-П13.33, ПЗ.З5, ПЗ.37,
ПЗ.47, ПЗ.48 - for butt rectilinear and annular welded joints with inner diameter of joined parts over 750 mm; in Tables П3.20-П3.22, П3.25-П3.28, ПЗ.30,
ПЗ.32, ПЗ.33, ПЗ.З5, ПЗ.37, П3.42-П3.44, ПЗ.46, ПЗ.49, ПЗ.5О - for butt
welded joints with inner diameter of joined parts of up to 750 mm; in Tables
П3.55-П3.65 - for angle, tee-joint and edge welding joints.
12.4. Welded joints of parts made of steels belonging with different
structural classes and of two-ply steel should correspond, in terms of geometry, to the welded joints of steels belonging with the same structural classes
provided the requirements for preliminary overlaying of edges, grooving, cladding and separating and protective overlays, as specified in Subsections 6.3
and 6.4 are met.
Structural elements of welding-prepared edges of parts made of different structural steels and/or two-ply steel after preliminary edge overlaying
as per the requirements of Subsections 6.3 and 6.4 and machining should
correspond to the requirements established for the accepted type of the
welded joint without overlaying of edges, the cladding removal requirements
of para. 6.4.1 being met.
Structural elements of fabricated welded joints of parts made of different structural steel classes and/or two-ply steel should correspond to the requirements established for the accepted type of the welded joint of parts
made of a homogeneous metal, the requirements of Subsections 6.3 and 6.4
being met.
12.5. In case of welding of parts which nominal thickness differs from
the values given in Attachment 3 the sizes of structural elements of prepared
edges and fabricated welds are taken in accordance with the ones established for parts having the most close thickness value.
12.6. While fabricating welded joints of types 1-21 and 1-25 (as modified) it is permitted to use argon-arc non-consumable electrode welding as
with a filler material as without it.
12.7. The sizes of structural elements established for angle welded
joints of types 2-03 and 2-04 relate only to the cross-section given in the
drawing. The sizes of structural elements of other cross-sections are established in the drawings.
12.8. The welded joint of type 1-01 is permitted with the melt backing.
In this case, when the nominal thickness of the parts being welded is up to 10
mm inclusive, it is permitted to weld on one side with one pass.
12.9. Roughness of the edges prepared for welding should not be
more than
R
80
z .
12.10. The shape and sizes of the remaining cylindrical backing rings
and melted inserts, as well as the permissible values of gaps between a ring
and welded parts, should correspond to those shown in Fig. 5. It is permitted
to round the ring inner edges within radius of up to 3 mm instead of removing
bevels on them.
Fig. 5. The remaining cylindrical backing rings (а) and melted inserts (б). Dк =
Dp (with regard to nominal size). For diameter Dк only negative limiting deviation is established (in drawings and/or PED). The limiting deviations of sizes
Dк AND Dp should ensure the permissible gap value S . Diameter Dвc is established in drawings and/or the PED depending on the boring diameter Dp
and the welded joint type.
S, mm
Sк , mm
В, mm
в, mm, not
more than
Nominal value
Up to 75 (inclusive)
Over 75 up to 150 (inclusive)
Over 150 up to 300 Over
300
Limiting deviation
2.0
2.5
16-20
20-24
0.2
0.3
20-24
24-30
0.4
0.5
±0.2
3.0
4.0
It is permitted to use melted inserts of other shape pursuant the guidance in drawings and or PED.
12.11. To ensure the minimum displacement of edges on the inner
side of the joint it is recommended to do the cylindrical sizing (boring, expansion) of the pipe ends as it is shown in Fig. 6.
In cases specified in the design documentation, to fabricate welded
joints of pipes made of austenitic steel it is permitted to do a conical expansion (boring) of the pipe ends as per Fig. 7 using conical backing rings as it is
shown in Fig. 8 provided the above structural features are considered in
strength calculations.
Fig. 6. The cylindrical boring (а) and sizing (expansion) (б) of pipe (nozzle)
ends for butt one-sided welded joints. Diameters Dр are established by drawings and/or PED. At this for Dр only the positive limiting deviation is established. The length L of the cylindrical part of boring and sizing (expansion) of
pipe (nozzle) ends for welded joints which are not subject to ultrasonic testing
is as follows:
S, mm
From 1 up to 4 (inclusive)
Over 4 up to 8 (inclusive)
Over 8 up to 15 (inclusive)
Over 15 up to 25 (inclusive)
Over 25 up to 40 (inclusive)
Over 40 up to 60 (inclusive)
Over 60 up to 80 (inclusive)
Over 80
L, mm, not less than
10
15
20
25
30
35
40
50
When the pipes (nozzles) are prepared for the welding joints subject to
ultrasonic testing, the length L is established in the drawings and/or PED in
accordance with the guidance of the regulatory and technical documentation
for ultrasonic testing.
Fig. 7. Conical boring for joints on a conical backing ring for S over 5 mm (а)
and sizing (expansion) of pipe (nozzle) ends for S up to 5 mm (inclusive) (б)
Fig. 8. A conical backing ring (Dр is the diameter of boring, expansion or sizing to fit the ring; Dк is the backing ring outer diameter)
D, mm
Up to 75 (inclusive)
Over 75 up to 150 (inclusive)
Over 150
Sк, mm
2.0±0.2
2.5±0.2
3.0±0.2
12.12. In cases specified in the design documentation it is permitted
not fabricate or remove the weld reinforcement.
13. Deviations from Established Requirements
Where it is technically or economically unreasonable to follow individual requirements of this document it is permitted to deviate from them provided there are justifications formalized in joint technical solutions made by
the design organization and manufacturing enterprise (assembling organization) as agreed upon with the leading material study organization and Gosatomenergonadzor of the USSR.
ATTACHMENT 1
(reference)
REFERENCE BOOK
of regulatory and technical documentation for welding materials permitted for
manufacturing, assembling and repair of equipment and piping of nuclear
power installations
Welding materials
Name
Welding wire
Welding tape
Code of document
Grade
Св-08А, Св-08АА, Св-08ГА, СВ-10ГА,
Св-10Г2, Св-08ГС, Св-12ГС,
Св08Г2С, Св-08ГСМТ, Св-10НМА. Св08ХМ, Св-08ХМФА Св-10ХМФТ, СвСв08ХГСМА, Св-08ХГСМФА,
04Х2МА, Св-13Х2МФТ,
Св10Х11НВМФ, Св-06Х14,
Св06Х19Н9Т, Св-08Х19Н10Г2Б, Св08Х19Н10МЗБ, Св-04Х19Н11МЗ, Св07Х25Н13, Св-10Х16Н25АМ6, СвЗ0Х15Н35В3Б3Т
Св-06А
Св-10ГНМА, СВ-10ГН1МА,
Св10ГН2МФА
Св-10ХМФТУ
СВ-12Х2Н2МА, Св-12Х2Н2МАА
Св-09ХГНМТА, Св-09ХГНМТАА-ВИ
Св-16Х2НМФТА
Св-01Х12Н2-ВИ
Св-01Х12Н2МТ-ВИ
Св-09Х16Н4Б
Св-0ЗХ16Н9М2
Св-021Х17Н10М2-ВИ
Св-04Х17Н10М2
СВ-04Х20Н10Г2Б
Св-0ЗХ24Н13Г2Б
Св-0ЗХ15Н35Г7М6Б
Св-08АА-ВИ
Св-0ЗХ20Н45Г6М6Б-ВИ
Св-06ХГСМТА, Св-14Х12НВМФ
Св-13Х2МФТА
Св-08Х19Н10Г2Б, Cв-04X19H11M3, Cв07X25H13, Св-10Х16Н25АМ6
ГОСТ 2246-70
ТУ 14-1-1569-75
ТУ 14-1-2860-79
ТУ 14-1-3034-80
ТУ-14-1-2502-78
ТУ-14-1-3675-83
ТУ 14-1-3633-83
ТУ 14-1-1212-74
ТУ 14-1-3595-83
ТУ 14-1-1692-76
ТУ 14-1-2208-77
ТУ 14-1-1005-74
ТУ 14-1-1959-74
ТУ 14-1-3252-81
ТУ 14-1-2205-77
ТУ 14-1-2143-77
ТУ 14-1-4355-87
ТУ 14-1-2206-77
ТУ 14-1-2808-79
ТУ 14-1-4370-87
ТУ 14-1-3146-81
Coated welding
electrodes
Св-04Х20Н10Г2Б
Нп-0ЗХ22Н11Г2Б
Св-0ЗХ24Н13Г2Б
Св-0ЗХ15НЗ5Г7М6Б
ЦУ-5, ЦУ-6, ЦУ-7, ЦУ-7А,
ЦУ-2ХM, ЦЛ-20, ЦЛ-21, ЦЛ-25/1,
ЦЛ-25/2, ЦЛ-32, ЦЛ-38, ЦЛ-39,
ЦЛ-45, ЦЛ-48, ЦЛ-51, ЦЛ-59, ПТ-30, РТ45А, РТ-45АА, ЦТ-10, ЦТ-15К, ЦТ-26,
ЦТ-26М, ЦТ-45, ЦТ-48
ЦЛ-52
ЗИО-8
ОЗС-4
ОЗС-6
ТУ 14-1-2270-77
ТУ 14-1-2750-79
ТУ 14-112207-77
ТУ 14-1-2162-77
ОСТ 108.948.01-86
Certificate
№ 223-73
*
Certificate
№ ОC31-10-76(A)
Certificate
№ OC31-11-76(A)
УОНИИ-13/45, УОНИИ-13/45А,
*
УОНИИ-13/55, УОНИИ-13/45АА,
УОНИИ-13/55АА, УОНИИ-13/10Х13, Н3, Н-6, H-10, Н-20, Н-23, Н-25,
РТ-45Б,
ЭА-395/9, ЭА-400/10У,
ЭA-400/10T,
ЭА-582/23, ЭА-855/51, ЭА-898/21Б, ЭА902/14, ЭМ-959/52, A-1, A-1T, A-2, A-2Т,
КТЧ-7, АНО-4, МР-3
ТМУ-21, ТМЛ-1У, ТМЛ-3У
Welding fluxing
agents
ОСЦ-45, АН-348А, АН-348АМ, АН-8,
АН-22, АН-17M, АН-26, AH-26C
КФ-27
КФ-30
АН-42, АН-42М, ОФ-6, ОФ-10,
НФ18М, KФ-16 КФ-19, КФ-28, ФЦ-11, ФЦlФЦ-19,
16, ФЦ-16A, ФЦ-17, ФЦ-18,
ФЦ-21, ФЦ-22
Lanthanized tung- ВЛ
sten bars
ГОСТ 9466-75
ГОСТ 9467-75
ГОСТ 9087-81
ТУ 5.966-11087-78
ТУ 5.965-11090-78
*
ТУ 48-19-27-77
Yttrated tungsten
bars
СВИ-1
ТУ 48-19-221-76
Tungsten bars
ЭВЛ, ЭВИ-1, ЭВИ-2, ЭВИ-3, ЭВТ-15
ГОСТ 23949-80
Gaseous and liquid Highest and first grade
argon
ГОСТ 10157-79
Helium
Gaseous oxygen
First and second grade
for process applications
Gaseous and liquid Highest and first grade
carbon dioxide
ТУ 51-940-75
ГОСТ 5583-78
ГОСТ 8050-85
Notes:
1. The documents marked with a asterisk are listed in the additional Reference Book of Gosatomenergonadzor of the USSR.
2. It is permitted to use the welding materials in accordance with other (not
indicated in this Attachment) regulatory and technical documentation provided its requirements as stringent as those of the documentation indicated
herein.
3. As new regulatory and technical documents to substitute those indicated
herein come into force, the welding materials should be used as per new
regulations, specifications and certificates. In doing so, it is permitted for
two years after the replacement of a regulatory and technical document to
use the corresponding welding materials in accordance with new regulations, which were supplied under the document (previously effective) indicated in this Attachment.
ATTACHMENT 2
(reference)
EXEMPLARY WELDING AND OVERLAYING MODES
Table П2.1. Automated hidden arc welding
Steel grade
Perlitic
Type of
welded joint
Nominal part
thickness in
weld region,
mm
1-06
1-07
1-08
Over 50
1-12
1-13
Over 30
Welding mode parameters
Welding Name and numbers of
wire diamebeads
Amperage, А Arc voltage, V
Welding
ter, mm
speed,
mm/sec
5
5
Root beads on the side
of welding beginning
1
2
450-500 4803
530 550-600
34-40
34-40
34-40
10-12
8-10
the same
Back side root beads
1
2
3
650-700
34-40
5-7
Grooving filling beads
550-700
34-40
5-10
Grooving filling beads
550-700
34-40
5-8
1-05
Austenitic
1-09
1-10
1-04
1-01
Over 30 up to
80 (inclusive)
Root beads on the side
of welding beginning
1,2
3
500-550 600650
Back side backing
bead
950-900
34-40
34-40
10-11
8-9
42-45
5-7
Grooving filling beads
550-700
34-40
5-8
5
Grooving filling beads
550-700
34-40
5-8
Over 20 up to
60 (inclusive)
4
5
Any type
"
400-500
500-550
28-30
32-34
3-5
6-8
Up to 10
(inclusive)
4
"
400-500
28-30
3-5
Over 10
4
1
2
600-650 700800
32-36
32-36
6-7
8-9
Over 30
5
Table П2.2. Automated argon-arc welding
Steel
grade
Austenitic
Type of
welded joint
1-23
Nominal
Tungsten
Bead
part
welding elec- number
thickness trode diamein weldter, mm
ing region, mm
3.0
3.5
Over 1.6 up
to 4 (inclusive)
Over 1.6 up
to 4 (inclusive)
Welding
speed,
mm/sec
Filler
wire diameter,
mm
Welding
wire advancement
speed,
mm/sec
Welding wire to
part distance (preset), mm
Welding mode parameters
Amperage,
А
Arc voltage,
V
Argon flow rate, l/min
For burner
For feed
1
2-4
-
-
1-1.5
110-120
10-12
8-10
1-6
2-3
2-4
1.6
6-7.5
2-3
110-120
10-12
8-10
1-6
1
2-3
2-4
2-4
1.6
6-7.5
1.15
2-3
120-130
120-130
10-12
12-14
8-10
8-10
1-6
1-6
Table П2.3. Manual argon-arc non-consumable electrode welding
Type of
welded joint
Steel grade
Austenitic and perlitic
1-23
2-03
Iron-nickel alloys
2-04
1-23
2-03
2-04
Nominal thickness of parts Tungsten welding Filler wire diAmperage, A
Argon flow rate, l/min
in welding region, mm
electrode diameter, ameter, mm
Root bead Groove filling To burner For feed
mm
Over 3 up to 4
(inclusive)
Over 4 up to 6
(inclusive)
Over 4 up to 6
(inclusive)
Over 6
Over 3 up to 4
(inclusive)
Over 4 up to 6
(inclusive)
Over 4 up to 6
(inclusive)
Over 6
1.6-4.0
1.6-2.0
1.6-4.0
1.6-3.0
1.6-4.0
-
1.6-4.0
1.6-4.0
45-90
50-70
8-10
4-5
90-100
8-10
4-5
70-100
100-140
8-10
4-5
1.6-2.0
80-110
40-70
120-160
40-70
8-10
8-10
4-5
4-5
1.6-4.0
1.6-2.0
65-80
65-80
8-10
4-5
1.6-4.0
1.6-2.0
55-80
55-80
8-10
4-5
1.6-4.0
1.6-2.0
60-90
60-90
8-10
4-5
Table П2.4. Manual argon-arc non-consumable electrode pulse welding of piping made of austenitic steel
Nominal thickness of Bead number Tungsten welding Filler wire di- Pulse dura- Pause dura- Welding current, A
Argon flow rate, l/min
parts in welding reelectrode diameter, ameter, mm
tion, sec
tion, sec
gion, mm
mm
pulse
pause
To burner For feed
1.0-1.5
1
2,0
0.1-0.15
0.15-0.25
40-50
6-8
6-8
2-5
2
2.0
1.2
40-50
6-8
2-5
2.0-2.5
Over 2.0 up to 4.0
(inclusive)
Over 4.0 up to 9.0
(inclusive)
Over 9.0 up to 20.0
(inclusive)
1
2
2.0
2.0
1.6
0.4-0.6
-
0.3-0.5
-
50-70
50-70
6-8
-
6-8
6-8
2-5
2-5
1
2 and subsequent
1
2and subsequent
1
2 and subsequent
2.0-3.0
2.0-3.0
2.0-2.5
1.5-2.0
-
0.3-0.5
-
105-125
105-125
6-8
-
7-10
7-10
2-5
2-5
3.0
3.0
2.5-3.0
1.5-2.5
-
0.3-0.5
-
140-180
140-180
6-8
-
10-12
10-12
2-5
2-5
3.0-4.0
3.0-4.0
3.0-4.0
2.5-3.0
-
0.3-0.5
-
150-200
150-200
6-8
-
12-15
12-15
2-5
2-5
N o t e . The second and subsequent passes are made by non-pulse welding.
Table П2.5. Semi-automated gas shielded (argon and carbon acid gas)
consumable electrode welding of tubular parts made of austenitic steel;
i-shaped grooving
Welding
wire diameter, mm
Arc voltage, V
1.0; 1.2; 1.6
15-17
Amperage,
A
Pass number
Gas flow rate to burner,
l/min
argon
120-160
Second and subsequent
12-14
carbon acid
gas
2-4
N o t e . The first pass should be made by argon-arc non-consumable electrode welding using the modes given in Table П2.4.
Table П2.6. Electroslag welding
Characteristics
Unit of
measure
Nominal thickness
of parts in welding
region
mm
30-500
Gap between edges
of welded parts
Electrode wire diameter
Steel grade of welded parts
Perlitic
Austenitic
Electrode wire Consumable Electrode wire
Consumable
nozzle
nozzle
Over 100
30-500
Over 100
mm
As per Attachment 3
35±5
As per Attachment 3
35±5
mm
3-5
3-5
3-5
3-5
1-3
1 for 50-70
mm of thickness
1-3
1 for 50-70 mm
of thickness
Number of electrode wires (nozzles)
Welding electrode
transverse vibration
peed
Mm/sec
9-10
-
9-10
-
Welding electrode
extreme position
hold-up time
sec
4-5
-
4-5
-
Dry stick-out distance
mm
50-70
-
40-50
-
Consumable electrode plate thickness
mm
-
8-15
-
8-15
Amperage for one
electrode wire
A
Up to 700
Up to 700
Up to 450
Up to 400
Slag bath voltage
V
42-46
36-42
34-36
30-32
Welding speed for
metal of thickness
S,
not more than
Slag bath depth
mm/sec
98/(300+S)
98/(300+S)
98/(300+S)
98/(300+S)
mm
50-70
40-60
40-50
30-40
Cooling water temperature, not more
than
°С
60
60
60
60
Table П2.7. Automated hidden arc narrow grooving welding of perlitic
steel
(welded joint types 1-33, 1-34, 1-35, 1-36)
Welding wire diameter, mm
Amperage, A
Arc voltage, V
Welding speed, m/h
3
4
400-500
450-550
32-36
34-38
22-28
22-28
N o t e . It is preferable to use the electrode wire of 3 mm in diameter.
Table П2.8. Automated argon-arc non-consumable electrode pulse welding for making the root bead of unturning butt welded joints of
types 1-21, 1-25-1, 1-25-6 on pipes made of austenitic steel using welding machines ОДА, ГСМ and AT
Nominal diame- Nominal pipe Arc burning time Distance between Pulse amter of welded
wall thickness
before welding welding electrode perage, A
pipes, mm
or dulling thick- electrode moves, and item (pre-set),
mm
ness, mm
sec
14-38
Pulse duration, sec
Pause duration, sec
Welding electrode step
length, mm
Welding
speed,
mm/sec
Welding electrode movement
is uninterrupted
4.4-5.0
1
0.5
80-85
0.10-0.15
0.15-0.25
1.5
1.5
90-95
0.10-0.15
0.15-0.25
2
1.8
0.20-0.25
0.25-0.30
2.5
2.0
120-125
0.50-0.60
0.40-0.50
2.2-2.5
3
2.5
140-145
0.60-0.70
0.70-0.80
1.9-2.2
3.5
3.0
155-165
0.75-0.90
0.70-0.80
1.4-1.9
100-120
0.60-0.65
0.50-0.60
0.60-0.65
0.75-0.90
0.50-0.60
0.55-0.65
Step-bystep electrode
movement
0.75-0.90
0.55-0.65
3
57-159
Pause
amperage, A
0.8-1.2
3.0-4.0
3.5
4
3.0
3.0
4.5
4.0
1.0-1.5
105-110
120-130
140-155
150-165
6-8
25
2-2.4
3.1-3.3
2.8-3.3
Table П2.9. Automated argon-arc non-consumable electrode welding of unturning butt welded joints of types 1-25-1 on
pipes made of austenitic steel using welding machines АДГ-201УХЛ4 and "Комета"
Nominal diameter of
welded
pipes, mm
Nominal pipe
wall thickness,
mm
Bead
number
57-76
4-4.5
57-108
5-6
7-9
1
2
1
2-3
1
2-4
1
2-4
1
2-6
1
2-9
6-7
133-159
8-10
14-17
Distance between Filler wire di- Amperage, A Arc voltage, V
welding electrode ameter, mm
and item (pre-set),
mm
1-1.2
1.8-2.5
1-1.5
1.8-2.5
1-1.5
2-3
1-1.5
1.8-2.5
1-1.5
1.8-3.0
1-1.5
2-3
1.2
1.2-1.6
1.6
1.2-1.6
1.6
1.6
100-115
110-120
110-120
120-130
115-125
130-145
115-125
125-140
120-130
145-160
140-160
170-186
9-11
11-13
9-11
11-13
9-11
11-14
9-11
11-13
9-11
11-14
9-11
11-14
Welding
speed,
mm/sec
Wire feeding
speed, mm/sec
Welding electrode vibration
frequency,
1/min
1.7-2.1
1.9-2.2
1.8-2.1
1.7-1.9
1.8-2.1
1.7-1.9
1.5-1.8
1.5-1.9
1.7-1.9
1.7-1.9
1.7-1.9
1.9-2.2
5.0-6.1
4.2-5.6
5.0-6.1
4.2-4.7
4.4-5.6
5.6-6.9
60-70
60-70
50-60
60-70
50-60
40-50
Table П2.10. Automated argon-arc non-consumable electrode welding using
the automatic pressure technique to fabricate unturning butt welded joints of
type 1-21 on pipes made of austenitic steel without filler wire (except for root
bead made in accordance with the modes given in Table 9)
Nominal diame- Nominal pipe Distance between Amper- Arc voltage, V
ter of welded wall thickness, welding electrode age, A
pipes, mm
mm
and item (pre-set),
mm
14-25
32-38
57-108
2
2.5
3
2.5
3
3.5
3
3.5
4
4.5
1.2-2
1.5-2.5
1.5-2.5
60-70
60-70
70-80
60-75
75-90
85-100
75-90
80-95
80-95
80-100
10-12
9.5-11
9-10.5
Welding
speed,
mm/sec
Number of
arc passes
2.5-2.8
2.5-2.8
2.5-2.8
2.5-2.8
2.8-3.1
2.8-3.1
3-6
3-6
2.8-3.1
2-6
Table П2.11. Automated argon-arc non-consumable electrode welding using
the subsequent melting technique to fabricate unturning butt welded joints of
types 1-21 on pipes made of austenitic steel without filler wire using welding
machines ОДА, AT, ГСМ
Nominal diame- Nominal pipe Distance between
ter of welded wall thickness,
electrode and
pipes, mm
mm
item (pre-set),
mm
14
18
25
32
32
38
38
2
2.5
2
3
3.5
3
3.5
0.8-1.2
Amperage, A
85-95
90-105
90-100
105-115
105-115
115-120
110-120
Arc voltage, V
8-10
Welding
speed,
mm/sec
Number of uninterrupted arc
passes
15.3-17.0
13.9-15.3
12.5-13.9
6.9-8.3
5.6-6.9
6.9-8.3
5.6-6.9
3
4
3
3
3
3
4
Table П2.12. Automated argon-arc non-consumable electrode welding to fabricate unturning butt welded joints of
types 1-25-1, 1-25-6 on pipes made of austenitic steel with nominal diameter of 219 up to 560 mm and wall thickness
of 10 up to 40 mm using welding machines АДГ-301УХЛ4
Weld bead (layer)
number
Filler wire diameter, mm
Amperage, A
base
in pulse at
edge
Arc voltage, V
Welding
speed,
mm/sec
Wire feeding
speed, mm/sec
1
-
145-160
2
1.2
3
Electrode vibra- Electrode lag time
tion speed,
at edge, sec
mm/sec
145-160
8-9
1.7-1.8
-
-
-
125-145
150-160
9-10
0.8-1.0
3.6-4.2
2.5-3
1-1.4
1.6-2.0
155-170
180-190
9-10
0.8-0.9
5.6-6.9
2.5-2.8
0.8-1.1
4 and subsequent
(except for two last
layers)
Last but one layer
1.6-2.0
170-220
200-240
9.5-11
0.7-0.8
6.1-8.9
2.5-2.8
0.8-1.1
1.6-2.0
160-200
190-220
9-10
0.6-0.7
4.2-6.9
2.5-2.8
0.7-1
Last layer
1.6-2.0
160-200
160-200
9-10
0.6-0.7
3.3-4.7
3.0-3.5
0.2-0.5
Table П2.13 Automated argon-arc non-consumable electrode welding to fabricate unturning butt welded joints of
types 1-25-2 on pipes made of perlitic steel with nominal outer diameter of 219 up to 990 mm and wall thickness of 10
up to 65 mm using welding machine АДГ-301УХЛ4
Weld bead (layer)
number
Filler wire diameter, mm
1
Amperage, A
Arc voltage, V
Welding
speed,
mm/sec
Wire feeding Electrode vibra- Electrode lag
speed,
tion speed,
time at edge,
mm/sec
mm/sec
sec
base
in pulse at
edge
-
150-160
150-160
9-10
0.7-0.8
-
-
-
2
1.2
I80-I90
200-210
9-10
0.7-0.8
5.0-6.9
2.5
0.7-0.9
3
1.6-2.0
200-220
220-240
10-11
0.6-0.7
4.2-5.6
2.5
0.9-1.1
4 and subsequent
(except for two last
layers)
Last but one layer
1.6-2.0
210-230
240-260
10-11
0.6-0.7
5.0-8.3
2.5
0.9-1.1
1.6-2.0
200-210
220-240
10-11
0.6-0.7
5.0-6.4
3.0
0.8-1.0
Last layer
1.6-2.0
190-210
I90-210
9-10.5
0.6-0.7
4.2-5.6
3.0
0.7-0.9
Table П2.14. Tape electrode overlaying of corrosion resistant coating
Overlaying mode parameters
Arc voltage, V
Flux.agent ОФ-10 Flux.agent ФЦ-18
32-36
32-36
Tape grade
Tape section, mm
Amperage, A
Cв-07X25HI3
0.7х50
600-650
0.5х50
2(0.7х50)*
550-600
32-36
32-36
2.0-2.5
1100-1200
38-40
32-36
5.0-6.0
2(0.5х50)*
900-1000
38-40
32-36
4.2-4.5
Св-04Х20Н10Г2Б
0.7х50
650-700
32-36
32-36
2.2-2.8
(Св-08Х19Н10Г2Б)
0.5х50
600-650
32-36
32-36
2.0-2.5
2(0.7х50)*
1100-1200
38-40
32-36
5.0-6.0
2(0.7х50)*
2(0.5х50)*
1150-1250
38-40
32-36
4.2-5.0
950-1050
38-40
32-36
3.6-4.2
0.7х50
650-750
32-36
-
4.2-5.5
Нп-0ЗХ22Н11Г2Б
Св-0ЗХ15Н35Г7М6Б
* Overlaying using two tape welding electrodes set 10-14 mm apart from each other.
Overlaying speed,
mm/sec
2.2-2.8
Attachment 3
(recommended)
MAIN TYPES OF WELDED JOINTS
The following legend is used in the text of Attachment 3.
For types of welded joints: 1 - butt, 2 - angle, 3 – tee-joint, 4 - edge.
For welding techniques: 10 – automated hidden arc welding;
11 – automated hidden arc welding with preliminary root pass by manual arc
coated electrode welding; 12 – automated hidden arc welding on steel backing; 20 –
electroslag welding; 30 – manual arc coated electrode welding; 31 – manual arc
coated electrode welding with root pass; 32 – manual arc coated electrode welding
on steel backing; 40 – combined welding (weld root is made by argon-arc welding);
42 – combined welding on steel backing (weld root is made by argon-arc welding);
51 – argon-arc non-consumable electrode welding without filler metal; 52 – argonarc non-consumable electrode welding with filler metal; 53 – argon-arc consumable
electrode welding.
Tables П3.1-ПЗ.65 give two legends for a welded joint: the main one and
bracketed one. The main legend should be used in the design documentation intended for application in the COMECON countries (including the USSR). It is permitted to use the bracketed legend only in the design documentation intended for
application in the USSR.
Table ПЗ.1
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding S =S1,
techmm
nique
53
3
4
в, mm
Nominal
value
0
е =е1, mm
Limiting
deviation
Nominal
value
±0.5
±0.8
8
10
5
1-01
(C-1)
10
6
7
8
9
g =g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±3.
1.5
±1.5
±4
2.0
±1.5
12
0
±1.0
16
10
12
14
20
16
22
±5
Table ПЗ.2
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
1-01-1
(C-1-1)
Welding S =S1,
techmm
nique
51
3
4
5
52
6
40
8
е =е1, mm
Nominal
value
6
7
8
g =g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
1.0
±0.5
±1
1.5
10
Table ПЗ.3
Welded
joint legend
1-01-2
(C-1-2)
Structural elements
of prepared edges of the
welded parts
of weld
Welding S =S1,
techmm
nique
10
е, mm
Nominal
value
3
4
10
14
5
16
6
18
8
20
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
1.5
±2
2.0
±3
±1
Table ПЗ.4
Welded
joint legend
1-02
(C-2)
Structural elements
of prepared edges of the welded
parts
of weld
Welding S=S1,
techmm
nique
10
e, mm
Nominal
value
14
15
16
17
18
20
20
22
22
25
25
29
28
32
30
35
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±4
2.0
±1.5
±5
2.5
+2.0
-1.5
±6
2.5
+2.0
-1.5
Table ПЗ.5
Welded
joint legend
1-02-1
(C-2-1)
Structural elements
of prepared edges of the welded
parts
of weld
Welding S =S1,
techmm
nique
10
e, mm
Nominal
value
14
16
17
20
18
20
22
25
22
28
25
30
28
35
30
37
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±4
2.0
±1.5
±5
2.5
+2,0
-1.5
±6
2.5
+2,5
-1.5
Table ПЗ.6
Welded
joint legend
1-03
(C-3)
Structural elements
of prepared edges of the welded
parts
of weld
Welding S =S1,
techmm
nique
11
30
40
52
e, mm
Nominal
value
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
14
16
18
25
27
30
±5
2.5
+2.0
-1.5
20
22
25
33
35
40
±6
2.5
+2.5
-1.5
28
45
30
47
32
50
±8
3.0
+2.5
-2.0
36
54
40
60
Table ПЗ.7
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
Welding S=S1,
techmm
nique
10
1-03
(C-3)
e =e1,mm
Nominal
value
g =g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
20
22
25
15
17
19
±4
2.0
±1.5
28
32
36
40
21
23
26
28
±5
2.5
+2.0
-1.5
45
50
55
32
35
38
±6
2.5
+2.0
-1.5
60
43
±8
3
+2.5
-2.0
Table ПЗ.8
Welded
joint legend
1-05
(C-5)
Structural elements
of prepared edges of the welded
parts
of weld
Welding S=S1,
techmm
nique
10
e, mm
Nominal
value
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
30
32
34
36
38
40
34
35
36
37
38
39
±6
2.5
+2.5
-1.5
42
45
50
55
60
65
70
42
44
47
50
53
56
59
±8
3.0
+2.5
-2.0
75
63
80
66
±10
3.5
±2.5
Table ПЗ.9
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
1-05-1
(C-5-1)
Welding S =S1,
techmm
nique
30
For welded joints of parts made of austenitic steel
e, mm
Nominal
value
30
32
34
36
38
35
36
37
38
39
40
42
45
50
55
60
65
70
75
80
42
44
47
49
52
54
58
61
65
68
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±6
2.5
+2.5
-1.5
±8
3.0
+2.5
-2.0
±10
3.5
±2.5
Table ПЗ.10
Welded
joint legend
1-06
(C-6)
Structural elements
of prepared edges of the welded
parts
of weld
Welding S=S1,
techmm
nique
10
e=e1, mm
Nominal
value
g=g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
50
55
60
65
70
34
35
37
38
40
±6
2.5
+2.5
-1.5
75
80
90
100
110
120
130
43
44
47
50
53
56
59
±8
3.0
+2.5
-2.0
140
150
64
67
±10
3.5
±2.5
Table ПЗ.11
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
1-06-1
(C-6-1)
Welding S=S1,
technique mm
10
For welded joints of parts made of austenitic steel
e =e1, mm
Nominal
value
g =g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±6
2.5
+2.5
-1.5
50
55
60
65
70
35
37
38
40
43
75
80
90
100
110
120
130
44
47
50
53
56
59
64
±8
3.0
+2.5
-2.0
140
150
67
70
±10
3.5
±2.5
Table ПЗ.12
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
Welding S=S1,
technique mm
30
1-06-2
(C-6-2)
e =e1, mm
Nominal
value
g =g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
50
55
60
65
70
35
37
38
40
43
±6
2.5
+2.5
-1.5
75
80
90
100
110
120
130
44
47
50
53
56
59
64
±8
3.0
+2.5
-2.0
140
150
67
70
±10
3.5
±2.5
Table ПЗ.13
Welded
joint legend
1-07
(C-7)
Structural elements
of prepared edges of
the welded parts
of weld
Welding S=S1,
techmm
nique
10
h, mm
Nominal
value
Limiting
deviation
e, mm
Nominal
value
e1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
Nominal
value
Limiting
deviation
±5
2.5
+2.0
-1.5
±6
2.5
+2.5
-1.5
±8
3.0
+2.5
-2.0
100
15
85
30
120
20
90
34
140
25
160
30
102
39
180
35
108
44
200
40
±0.1h
96
114
±12
g1, mm
36
47
Table ПЗ.14
Welded
joint legend
1-07
(C-7)
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
10
h, mm
Nominal
value
e, mm
Limiting
deviation
Nominal
value
e1, mm
Limiting
deviation
Nominal
value
180
40
82
48
200
45
88
50
220
50
240
55
97
54
260
60
102
56
280
65
107
58
300
70
112
60
350
80
120
64
±0.1h
92
±12
52
Limiting
deviation
±8
Table ПЗ.15
Welded
joint legend
Structural elements
of prepared edges of the welded parts
of weld
Welding S=S1,
techмм
nique
10
30
1-09
(С-9)
Gap between the “nib” and the welded part should exceed 2 mm. The option
with backing ring or the plate.
1.“Nib”;
3. Backing ring (plate)
2. Root section to be removed by machining
e, мм
Nominal
value
30
48
35
53
40
58
45
64
50
69
55
74
60
78
65
85
70
89
75
80
93
97
g, мм
Limiting
deviation
Nominal
value
Limiting
deviation
±8
3.0
+2.5
-2.0
±10
3.5
±2.5
±12
4.0
±3.0
Table ПЗ.16
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
1-10
(C-10)
1.“Nib”;
3. Backing ring (plate)
of weld
Backing ring or plank option
2. Root section to be removed by machining
Welding S =S1,
techmm
nique
е =е1, mm
g =g1, mm
Nominal
value
Limiting
deviation
Nominal
value
60
64
±10
3.5
70
68
+2.5
-2.0
80
74
90
78
100
82
10
120
89
±12
4.0
±3.0
30
140
97
160
105
180
113
200
120
Limiting
deviation
Table ПЗ.17
Welded
joint legend
1-11
(C-11)
Structural elements
of prepared edges of the welded
parts
of weld
Welding S=S1,
techmm
nique
11
30
40
52
e=e1, mm
Nominal
value
14
16
15
16
18
17
20
22
25
28
30
32
36
40
45
50
55
18
20
22
24
25
27
29
32
35
38
43
g=g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±4
2.0
±1.5
±5
2.5
+2.0
-1.5
±6
2.5
+2.5
-1.5
±8
3.0
+2.5
-2.0
Table ПЗ.18
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
technique mm
R, mm
Nominal
value
e, mm
Limiting
deviation
30
35
40
1-12
(C-12)
11
30
40
Nominal
value
32
35
6
46
55
53
8
Nominal
value
±6
2.5
+2.5
-1.5
±8
3.0
+2.5
-2.0
Limiting
deviation
43
50
60
Limiting
deviation
38
±1
45
g, mm
56
Table ПЗ.19
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
1-13
(C-13)
11
30
40
e, mm
Nominal
value
60
48
65
70
50
52
75
80
54
56
g1, mm
Limiting
deviation
Nominal
value
±8
3.0
+2.5
-2.0
Limiting
deviation
90
60
100
66
110
70
120
130
74
78
10
3.5
±2.5
140
82
±12
4.0
±3.0
Table ПЗ.20
Welded
joint legend
1-14
(C-14)
1-15
(C-15)
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
e, mm
g, mm
Nominal
value
Limiting
deviation
Nominal
value
Limiting
deviation
2
7
±2
1.5
±1.0
30
3
8
53
4
9
3
10
31
4
11
±3
2.0
+1.0
-1.5
40
52
53
5
12
6
15
±4
2.0
±1.5
±3
Table ПЗ.21
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
b, mm
Nominal
value
e, mm
Nominal
value
Limiting
deviation
12
±3
15
±4
2.0
±1.5
27
±5
2.5
+2.0
-1.5
20
34
±6
25
42
±8
30
49
Limiting
deviation
5
7
2
±1
10
1-16
(C-17)
31
40
g, mm
15
Nominal
value
Limiting
deviation
+1.0
-1.5
19
3
52
+2.0
-1.5
3.0
+2.5
-2.0
Table ПЗ.22
Welded
joint legend
Structural elements
of prepared edges
of the welded parts
of weld
Welding S=S1,
technique mm
b, mm
Nominal
value
e, mm
Sn, mm
Limiting
deviation
Nominal
value
Limiting
deviation
4
6
32
8
Nominal
value
Limiting
deviation
12
±3
15
2
4
18
10
±0.1
+1
25
42
15
29
53
18
34
20
36
25
Nominal
value
5
3
Limiting
deviation
+1.0
2.0
-1.5
±4
±1.5
±1,5
+2.0
-1.5
22
12
1-17
(C-16)
g, mm
2.5
+2.5
-1.5
±6
45
28
48
30
51
36
57
40
62
±8
3.0
+2.5
-2.0
±10
3.5
±2.5
Table ПЗ.23
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
e=e1, mm
of weld
Welding
technique
30
S=S1,
mm
Nominal
value
14
16
16
17
18
19
20
20
22
22
25
24
28
26
30
27
32
28
36
31
40
33
45
37
50
40
55
44
g=g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±4
2.0
±1.5
40
1-18
53
(C-18)
52
60
48
+2.0
±5
-1.5
2.5
+2.5
±6
±8
-1.5
+2.5
3.0
-2.0
Table ПЗ.24
Welded
joint legend
1-19
Structural elements
of prepared
edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
20
bр, mm
Nominal
value
20-34
22
35-80
26
R, mm
Limiting
deviation
Nominal
value
e=e1, mm
Limiting
deviation
-
g=g1, mm
Nominal
value
Limiting
deviation
Nominal
value
Limiting
deviation
28
±4
2.5
±1.5
33
±5
3.0
±2.0
38
±6
3.5
±2.5
(C-19)
±2
±1
81-500
30
20-34
22
10
28
±4
2.5
±1.5
35-80
26
12
33
±5
3.0
±2.0
81-500
30
14
38
±6
3.5
±2.5
1-20
(C-20)
20
Table ПЗ.25
Welded
joint legend
1-21
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
51
1.0
52
1.5
e, mm
Nominal
value
g, mm
g1, mm
Limiting
deviation
Nominal
value
±2
1.0
+1.0
-0.5
±2
1.5
+1.0
-0.5
±3
2.0
+1.5
-1.0
±2
1.5
+1.5
-0.5
4
Limiting
deviation
Nominal
value
Limiting
deviation
0.5
+1.0
-0.5
0.5
+1.0
-0.5
0.5
+1.0
-0.5
1.0
±1.0
(C-21)
1-22
2.0
5
53
2.0
7
52
2.5
9
(C-22)
1-23
40
3.0
10
53
3.0
7
52
4.0
+1.5
-1.0
9
±3
(C-23)
40
5.0
11
6.0
12
2.0
Table ПЗ.26
Welded joint
legend
Structural elements
of prepared edges of the
welded parts
of weld
1-21-1
(C-21-1)
Welding S=S1,
techmm
nique
51
52
For sheet thickness S=1÷2 mm it is permitted to use filler wire of d=1÷2 mm.
0,3
0,4
0,5
0,6
0,8
1,0
1,5
2,0
e, mm
Nominal
value
g, mm
Limiting
deviation
4
ь, nn
Not more than
0.2
3
g1, mm
0.2
+1
+2
0.3
0.4
0.8
1.0
0.25
0.3
0.4
0.5
0.1
0.2
Table ПЗ.27
Welded
joint legend
1-21-2
(C-39)
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
51
52
S=S1,
mm
e, mm
Nominal Limiting
value
deviation
1.5
4
2.0
2.5
3.0
5
3.5
4.0
4.5
6
5.0
6.0
7.0
7
g, mm
Nominal Limitvalue
ing
deviation
±2
1.5
±3
±1.0
Table ПЗ.28
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
Welding S=S1,
technique mm
52
1-21-1
(C-22-1)
53
40
e, mm
Nominal
value
Limiting
deviation
1.5
2.0
6
7
±2
2.5
3.0
3.5
8
9
10
±3
g, mm
g1,
Nominal мм Limitvalue
ing
deviation
1.0
±0.5
Table ПЗ.29
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
e, mm
Nominal
value
4
9
5
10
6
11
8
15
1-24
53
10
17
(C-18)
52
12
21
14
23
16
26
18
28
20
32
22
34
25
38
28
44
30
46
40
g, mm
Limiting
deviation
Nominal
value
g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
0.5
+1.0
-0.5
1.0
±1.0
1.0
+1.5
-1.0
+1.5
-1.0
±3
2.0
+2.0
-1.0
±4
±5
+2.0
-1.5
2.5
+2.5
-1.5
±6
±8
3.0
+2.5 2.0
Table ПЗ.30
Welded
joint legend
1-21-2
(C-39)
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
51
52
S=S1,
mm
e, mm
g1, mm
Nominal
value
Limiting
deviation
4
5
6
11
12
14
±3
8
10
16
19
±4
12
14
16
22
24
26
±5
Nominal
value
Limiting
deviation
1.5
+1.5
-1.0
2.0
+2.0
-1.5
Table ПЗ.31
Welded
joint legend
1-24-2
(C-24-2)
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
40
51
52
e, mm
Nominal
value
4
10
5
11
6
12
8
17
10
19
12
24
14
27
16
30
18
32
20
37
22
40
25
44
28
51
30
53
g, mm
Limiting
deviation
Nominal
value
g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
0.5
+1.0
-0.5
1.0
±1.0
1.0
+1.5
-1.0
+1.5
-1.0
±3
2.0
±4
+2.0
-1.0
±5
+2.0
-1.5
2.5
+2.5
-1.5
±6
±8
3,0
+2.5 2.0
Table ПЗ.32
Welded
joint legend
Structural elements
of prepared edges of
the welded parts
of weld
Welding S=S1,
technique mm
6
40
52
1-25
(C-25)
e, mm
Nominal
value
g, mm
Limiting
deviation
Nominal
value
±4
2.0
±5
2.5
g1, mm
Nominal
value
Limiting
deviation
+2.0
-1.0
1.0
±1.0
+2.0
-1.5
1.0
+1.5
-1.0
Limiting
deviation
15
8
16
10
18
12
20
14
21
16
22
18
23
20
24
22
26
25
28
28
30
30
32
±6
+2.5
-1.5
Table ПЗ.33
Welded
joint legend
1-25-1
(C-42)
Structural elements
of prepared edges of the welded
parts
of weld
Welding
technique
40
52
S=S1,
mm
e, mm
Nominal
value
4
5
6
10
11
12
8
10
12
16
18
20
13
14
16
18
20
23
26
28
30
34
36
40
28
31
33
37
40
44
g, mm
Limiting
deviation
Nominal
value
±3.0
1.0
+1.5
-0.5
±4.0
1.5
+1.5
-1.0
±5.0
2.0
+1.0
-1.5
N o t e . It is permitted to fabricate the root weld with melting insert as in Fig. 5. In doing so, the nominal value of "e" should be increased by 2 mm.
Limiting
deviation
Table ПЗ.34
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
13
14
15
16
17
19
20
±4
40
6
8
10
12
14
16
20
26
28
30
23
24
25
±5
1-25-2
(C-25-1)
52
e, mm
Nominal
value
Limiting
deviation
g, mm
g1,
Nominal мм Limitvalue
ing
deviation
N o t e . It is permitted to fabricate the root weld with melting insert as in Fig. 5. In doing so, the nominal value of "e" should be increased by 2 mm.
2.0
+2.0
-1.5
2.5
±2.0
Table ПЗ.35
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
40
1-25-3
(C-42-1)
52
S=S1,
mm
e, mm
g, mm
g1,
Nominal мм Limitvalue
ing
deviation
Nominal
value
Limiting
deviation
6
8
10
11
±3
1.0
+1.5
-0.5
10
12
16
18
20
12
14
16
18
21
±4
1.5
+1.5
-1.0
26
28
30
34
36
40
26
29
31
35
38
42
±5
2.0
+1.0
-1.5
Table ПЗ.36
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
1-25-4
(C-25-2)
40
52
S=S1,
mm
e, mm
Nominal
value
6
8
10
12
14
11
12
13
14
15
16
20
17
18
26
28
30
22
23
24
Limiting
deviation
g, mm
g1,
Nominal мм Limitvalue
ing
deviation
2.0
+2.0
-1.5
2.5
±2.0
±4
±5
Table ПЗ.37
Welded
joint legend
1-25-5
(C-42-2)
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
52
40
S=S1,
mm
e, mm
Nominal
value
8
10
12
14
16
18
20
11
12
13
14
15
16
17
26
30
34
40
18
19
20
21
Limiting
deviation
g, mm
g1, мм LimitNominal
value
ing
deviation
±3
1.5
±1.0
±4
Table ПЗ.38
Welded
joint legend
1-25-6
(C-25-3)
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
52
40
S=S1,
mm
e, mm
Nominal
value
8
10
12
16
18
20
12
13
14
15
16
17
26
28
19
21
Limiting
deviation
g, mm
g1,
Nominal мм Limitvalue
ing
deviation
±3
1.5
±4
±1.0
Table ПЗ.39
Welded
joint legend
1-25-7
(C-27)
Structural elements
of prepared edges of the welded
parts
of weld
Welding
technique
30
40
S=S1,
mm
38
40
42
45
50
55
60
65
70
e, mm
Nominal
value
27
28
29
30
31
33
35
37
39
Limiting
deviation
±5
g, mm
g1,
Nominal мм Limitvalue
ing
deviation
2.5
+2.5
-2.0
3.5
+2.5
-3.0
Table ПЗ.40
Welded
joint legend
1-25-8
(C-27-1)
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
52
40
S=S1,
mm
38
40
42
45
50
55
60
65
70
e, mm
Nominal
value
21
22
23
24
26
27
28
29
31
Limiting
deviation
g, mm
g1,
Nominal мм Limitvalue
ing
deviation
2.5
±5
3.5
+2.5
-2.0
+2.5
-3.0
Table ПЗ.41
Welded
joint legend
Structural elements
of prepared edges of
the welded parts
of weld
Weld- S=S1,
ing
mm
technique
11
30
Limiting
deviation
Nominal
value
15
15
17
20
19
0
±0.3
22
35
24
40
26
10
17
15
19
20
21
1.5
±0.5
g,mm
Limiting
deviation
Nominal
value
g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
1
±1.0
+2
21
30
25
40
Nominal
value
E, mm
10
25
1-25-9
(C-27-2)
b, mm
+4
+2
23
30
24
35
26
40
28
+4
2
+2.0
-1.5
Table ПЗ.42
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
e, mm
Nominal
value
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
52
3,0
10
+1.0
-1.5
±3
1-26
(C-26)
42
3,5
11
32
4,0
12
2.0
4,5
13
±4
5,0
14
±1.5
Table ПЗ.43
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
3.0
52
e, mm
Nominal
value
g, mm
Limiting
deviation
Nominal
value
g1, mm
Limiting
deviation
Nominal
value
+1.5
-1.0
0.5
+1.0
-0.5
1.0
±1.0
Limiting
deviation
10
±3
3.5
11
4.0
1-27
(C-40)
40
4.5
12
5.0
14
5.5
15
6.0
16
7.0
17
2.0
±4.0
+2.0
-1.0
Table ПЗ.44
Welded
joint legend
Structural elements
of prepared edges of
the welded parts
of weld
Welding
technique
S=S1,
мм
e, мм
Nominal
value
g, мм
Limiting
deviation
Nominal
value
±3
2.0
g1, мм
Limiting
deviation
Nominal
value
Limiting
deviation
1.0
±1.0
5.0
1-28
(C-28)
52
5.5
40
6.0
9
7.0
10
8.0
9.0
11
10.0
+1.5
-1.0
Table ПЗ.45
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
Welding S=S1,
technique mm
30
e, mm
Nominal
value
2
7
3
8
4
Limiting
deviation
Nominal
value
Limiting
deviation
+3
1.5
±0.5
9
1-28-1
(C-28-1)
1-perlitic steels (alloyed up to 6 mm);
2 –austenitic steels
g, mm
5
10
6
14
8
18
10
22
Table ПЗ.46
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
Welding
technique
53
42
1-29
(C-29)
32
S=S1,
mm
6
8
10
12
14
16
18
20
22
25
28
30
e, mm
g, mm
Nominal
value
Limiting
deviation
Nominal
value
Limiting
deviation
18
20
22
24
25
26
28
29
30
32
34
35
±4
2.0
±1.5
+2.0
-1.5
±5
2.5
±6
+2.5
-1.5
Table ПЗ.47
Welded
joint legend
1-29-1
(C-29-1)
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
e, mm
Nominal
value
6
20
8
22
32
10
24
42
12
26
14
27
16
28
18
30
20
31
22
32
25
34
28
36
30
37
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±4
2.0
±1.5
+2.0
-1.5
±5
2.5
±6
+2.5
-1.5
Table ПЗ.48
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
6
e, mm
Nominal
value
15
8
17
53
10
21
42
12
23
14
26
16
29
18
32
20
34
22
37
25
43
28
46
30
49
1-30
(C-31)
32
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±4
2.0
±1.5
+2.0
-1.5
±5
2.5
+2.5
-1.5
±6
±8
3.0
+2.5
-2.0
Table ПЗ.49
Welded
joint legend
1-31
(C-30)
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
40
e, mm
Nominal
value
6
15
8
17
10
18
12
20
14
21
16
22
18
23
20
25
22
27
25
28
28
30
30
31
g, mm
Limiting
deviation
Nominal
value
g1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±4
2.0
+2.0
-1.0
1.0
±1.0
±5
2.5
+2.0
-1.5
1.0
+1.5
-1.0
±6
+2.5
-1.5
Table ПЗ.50
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
8
1-32
(C-32)
40
e, mm
Nominal
value
19
9
20
10
22
12
23
14
24
16
25
18
26
20
27
22
29
25
30
28
33
30
34
g1 , mm
g, mm
Limiting
deviation
Nominal
value
±4
2.0
±5
2.5
±6
Limiting
deviation
Nominal
value
Limiting
deviation
1.0
±1.0
1.0
+1.5
-1.0
+2.0
-1.0
+2.0
-1.5
+2.5
-1.5
Table ПЗ.51
Welded
joint legend
1-33
(C-33)
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
10
S=S1,
mm
e, mm
Nominal
value
e1, mm
Limiting
deviation
Nominal
value
90
35
30
120
38
31
150
41
180
44
35
240
49
38
300
55
41
360
61
44
±6
33
Limiting
deviation
±5
Table ПЗ.52
Welded
joint legend
1-34
(C-34)
Structural elements
of prepared edges of the welded
parts
of weld
Welding
technique
S=S1,
mm
e, mm
Nominal
value
Limiting
deviation
Nominal
value
Limiting
deviation
60
7
24
±6
100
9
32
±7
150
11
40
±8
50
±10
±1
10
11
e1, mm
250
12
Table ПЗ.53
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
1-35
(C-35)
10
α, deg
Nominal
value
B, mm
Limiting
deviation
Nominal
value
Limiting
deviation
Nominal
value
Limiting
deviation
40
3
9
20
±5
60
2
14
25
±6
100
2
18
32
±6
±1
Root section to be removed by machining
e, mm
±1
150
2
22
40
±8
250
2
24
50
±10
Table ПЗ.54
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding S=S1,
techmm
nique
1-36
(C-36)
12
α, deg
Nominal
value
B, mm
Limiting
deviation
Nominal
value
e, mm
Limiting
deviation
Nominal
value
Limiting
deviation
40
3
9
20
±5
60
2
14
25
±6
100
2
18
32
±6
150
2
22
40
±8
250
2
24
50
±10
±1
±1
Table ПЗ.55
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
2-01
(У-1)
S, mm
S1, mm
e, mm
g, mm
Nominal
value
Limiting
deviation
Nominal
value
Limiting
deviation
10
19
±4
2.0
±1.5
12
22
+2.0
11
14
≥0.75S
26
±5
-1.5
31
16
29
18
32
40
2.5
±6
20
35
+2.5
-1.5
Table ПЗ.56
Welded
joint legend
Structural elements
of prepared
edges of the
welded parts
of weld
Weld- S=S1,
h, mm
ing
mm Nominal Limittechvalue
ing
nique
deviation
20
e, mm
Nominal
value
22
±1
25
2-02
(У-2)
28
Limiting
deviation
Nominal
value
25
7
10
g, mm
28
8
36
Limiting
deviation
Nominal
value
g1, mm
Limiting
deviation
Nominal
value
-1.5
16
8
±3
2.5
+2.5
±6
18
9
-1.5
30
30
38
±2
21
10
34
44
36
47
40
12
10
±8
3.0
±4
+2.5
-2.0
50
Limiting
deviation
+2.0
±5
32
e1, mm
24
12
Table ПЗ.57
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
e, mm
Nominal
value
4
14
6
17
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
7
±3
8
+3
-2
2-03
(У-3)
8
20
10
10
24
12
52
±4
32
±3
12
28
14
14
32
16
16
36
42
±5
18
+4
-3
18
40
20
44
20
±6
22
±4
A layer of metal to be removed by machining
Table ПЗ.58
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
e, mm
Nominal
value
g, mm
Limiting
deviation
Nominal
value
4
14
7
6
17
8
8
20
10
10
24
12
±3
52
+3
-2
±4
2-04
Limiting
deviation
±3
32
12
28
14
42
14
32
16
16
36
(У-4)
±5
18
+4
-3
18
40
20
44
20
±6
22
±4
A layer of metal to be removed by machining
Table ПЗ.59
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
Welding
technique
2-03
(У-3)
S=S1,
mm
e, mm
Nominal
value
4
5
5
6
6
8
8
11
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
5
+2
+2
6
+3
32
The size is established for each specific joint.
The recommended ratio for the joint is D/D1≤0.4
10
14
8
12
17
9
14
20
10
16
23
11
18
26
20
28
+4
13
14
±3
±4
Table ПЗ.60
Welded
joint legend
Structural elements
of prepared edges of
the welded parts
of weld
Welding
technique
S1,
mm
4
e, mm
Nominal
value
7
6
10
8
14
e1, mm
Limiting
deviation
Nominal
value
Limiting
deviation
±2
6
±2
16
12
20
31
14
24
40
16
26
Nominal
value
Limiting
deviation
4
+2
-1
5
±3
8
8
11
3-01
(T-1)
g1, mm
Nomi- Limiting
nal
deviavalue
tion
3
7
10
10
g, mm
10
±3
+3
-2
4
+2
-1
10
5
18
28
20
30
22
34
12
13
±4
14
14
±4
18
37
7
+3
-2
15
17
±5
25
+4
-3
18
9
+5
-4
Table ПЗ.61
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
Welding
technique
S=S1,
mm
10
e=e1, mm
Nominal
value
g=g1, mm
Limiting
deviation
8
Nominal
value
Limiting
deviation
4
+2
-1
±2
3-02
(T-2)
10
15
12
20
15
25
18
30
23
6
7
±3
9
11
±4
40
30
50
37
60
44
70
52
80
60
30
90
67
33
100
74
±5
15
18
+3
-2
+4
-3
+5
-4
22
±6
±8
26
37
+6
-5
+8
-6
Table ПЗ.62
Welded
joint legend
Structural elements
of prepared edges of
the welded parts
of weld
Welding
technique
52
4-01
(У-6)
S=S1,
mm
h, mm
Nominal
value
4-02
(У-7)
Minimum distance between weld edges t is established
by the design documentation.
Nominal
value
1.5
3.5
1.5
2.0
4.5
2.0
2.5
5.5
3.0
51
Limiting
deviation
1.0
2.5
кумен
е, mm
±0.2
g, mm
Limiting
deviation
Nominal
value
Limiting
deviation
+1.5
-0.5
0.5
±0.5
1.0
+1.0
-0.5
-
-
6.5
3.0
7.0
1.0
3.0
1.5
3.5
2.0
4.0
2.5
4.5
3.0
5.0
+1.5
-0.5
+2.5
-0.5
Table ПЗ.63
Welded joint
legend
4-03
(У-8)
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S=S1,
mm
e, mm
Nominal
value
1.0
3.0
1.5
3.5
2.0
4.0
2.5
4.5
3.0
5.0
Limiting deviation
+1.5
51
-0.5
+2.5
-0.5
Table ПЗ.64
Welded
joint legend
Structural elements
of prepared edges of the
welded parts
of weld
Welding
technique
S, mm
h1, mm
Nominal
value
R, mm
Limiting
deviation
1.0
Nominal
value
t, mm,
not
less than
Limiting
deviation
0.5
1.0
0.8
1.5
3.5
51
4-04
(У-9)
1.5
±0.5
±0.2
2.0
4.0
1.0
2.0
2.5
4.5
1.2
2.5
3.0
5.0
1.5
3.0
Table ПЗ.65
Welded
joint legend
Structural elements
of prepared edges of the welded
parts
of weld
Welding
technique
S=S1,
mm
40
22
24
26
30
34
40
44
50
36
39
41
46
49
59
64
72
54
60
64
70
76
87
90
97
4-05
(У-10)
e, mm
Nominal
value
Limiting
deviation
g, mm
g1,
Nominal мм Limitvalue
ing
deviation
+3
2.0
+2
-1
+3
3.0
±2
FEDERAL STANDARDS AND RULES IN THE FIELD OF
USE OF ATOMIC ENERGY
AMENDMENT № 1
to PNAE G-7-009-89 “Equipment and Piping of Nuclear
Power Installations. Welding and Overlaying Welding.
Basic Provisions”
Moscow 2000
Federal Nuclear and Radiation Safety
Authority of Russia
(GOSATOMNADZOR OF RUSSIA)
FEDERAL STANDARDS AND RULES IN THE FIELD OF USE OF
ATOMIC ENERGY
Attachment to
By Gosatomnadzor of Russia
Order № 8
of December 27, 1999
AMENDMENT № 1
to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power Installations. Welding and Overlaying.
Basic Provisions”
Effective since
September 1, 2000
Moscow 2000
AMENDMENT № 1
to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power
Installations. Welding and Overlaying.
Basic Provisions”
Content of the Amendment:
1. Title page.
1) To replace the name of the federal executive body “The
State Committee of the USSR for Supervision over Safe Conduct
of Operations in Nuclear Power (Gosatomenergonadzor of the
USSR)” with the name “The Federal Nuclear and Radiation Safety
Authority of Russia (Gosatomnadzor of Russia)”.
2) The free space of the Title page of PNAE G-7-009-89
document below its title should have the wording: “Effective as
amended, Amendment № 1 (see Gosatomnadzor of Russia Order
№ 8 of December 27, 1999). The following items were modified:
paragraph 1.4; Table 4; paragraph 2.18; Table 10; paragraphs
9.13, 11.1-11.5; Section 13; Attachments 1, 3".
2. Paragraph 1.4.
It should be read as follows:
1.4. Welding of materials, which are not indicated in these BP
but permitted for use by the NPI Rules, is permitted in
accordance with the PED developed by the manufacturing
enterprise (assembling organization) taken into account the
requirements of these BP as agreed with the leading material
study organization and duly approved by Gosatomnadzor of
Russia. It is permitted to apply the PED developed by the
leading material study organization.
Note.
The Leading Material Study Organization is the
organization acknowledged by a respective atomic energy
use entity as the one to render services to a utility and other
entities in selection of materials, welding, quality assurance of
manufacturing of equipment and piping and to review design,
engineering documentation and documents justifying nuclear
and radiation safety of NPI, and the organization having a
license for the relevant activities issued by Gosatomnadzor of
Russia.
The agreement of a leading material study organization
should mean its positive conclusion.
3. Table 4. Welding materials for fabricating the welded joints
of parts made of austenitic steel with the parts made of perlitic and
high-chromium steels (except for welded joints of Categories Iн
and IIн).
Note. Paragraph 7.
To replace the wording “the leading interagency material
study organization” with the wording “the leading material study
organization”.
4. Paragraph 2.18.
1) The first paragraph.
To replace the wording “the leading interagency material
study organization” with the wording “the leading material study
organization”.
2) The third paragraph.
To replace the wording “the leading interagency material
study organization” with the wording “the leading material study
organization”, then Paragraph 2.18 should read:
2.18. Tempering quality of each setting of welding electrodes
H-10, fluxing agents KФ-I6 and КФ-27, as well as welding electrodes УОНИИ-13/45А and УОНИИ-13/55 to be used for welding
of parts made of steel grade 10X2M among themselves and with
parts made of perlitic steels, is determined by hydrogen content in
the overlaid metal or weld metal in accordance with the methodology of the leading material study organization.
At this, the hydrogen content in the overlaid metal (weld
metal) in case of manual arc welding should not exceed 2.5 cm3
per 100 g, and in case of automated hidden arc welding it should
not exceed 3.0 cm3 per 100 g. Should the results be negative the
re-tempering of welding electrodes and fluxing agents is done followed by the determining of hydrogen content.
It is allowed, upon agreement with the leading material study
organization, to skip the determining of hydrogen content in the
overlaid metal when individual batches of welding materials
designated for welding of specific parts are checked.
5. Table 10. Recommended tempering modes for coated
welding electrodes and fluxing agents.
The footnote “It is permitted to reduce the tempering temperature down to 400±20 0С, as agreed upon with the leading interagency material study organization.” Should be read as follows:
It is permitted to reduce the tempering temperature down to
400±20 0С, as agreed upon with the leading material study
organization.
6. Paragraph 9.13.
To
replace
wording
"and
Regional
Office
of
Gosatomenergonadzor of the USSR" with the wording "and duly
approved by Gosatomnadzor of Russia", then Paragraph 9.13
should read:
9.13. Elimination of defects on one and the same section of a
welded joint or overlaid part is permitted only for three times.
At this, the corrected section should mean a rectangle of a
lest area, which fits the fall subject to welding, and the adjacent surfaces at a distance equal to three-time width of the
said rectangle (Fig. 4).
The issue concerning the correction of defects on one
and the same section of the welded joints (overlaid part) in
excess of three times should be resolved subject to an
agreement with the leading material study organization and
duly approved by Gosatomnadzor of Russia.
7. Section 11. Safety Requirements.
To replace the title of the Section with the title “Safety-at-Work
Requirements”.
8. Paragraphs 11.1 - 11.5.
To delete the paragraphs.
9. Section 13. Deviation from Established Requirements.
To replace the wording "and Gosatomenergonadzor of the
USSR” with the wording “and approved by Gosatomnadzor of
Russia”, then the Section 13 should read as follows:
13. Deviation from Established Requirements.
Where it is technically or economically unreasonable to follow
individual requirements of this document it is permitted to deviate from them provided there are justifications formalized in
joint technical solutions made by the design organization and
manufacturing enterprise (assembling organization) as
agreed upon with the leading material study organization and
approved by Gosatomnadzor of Russia.
10. Attachment 1 (reference). Reference book of regulatory
and technical documentation for welding materials permitted for
manufacturing, assembling and repair of equipment and piping of
nuclear power installations
Notes.
Paragraph 1.
To replace the wording “Gosatomenergonadzor of the USSR”
with the wording "Gosatomnadzor of Russia", then paragraph 1
Notes should read:
The documents marked with an asterisk are listed in the additional Reference Book of Gosatomnadzor of Russia.
11. Attachment 3 (recommended). Main Types of Welded
Joints.
The wording “Tables П3.1-ПЗ.65 give two legends for a
welded joint: the main one and bracketed one. The main legend
should be used in the design documentation intended for application in the COMECON countries (including the USSR). It is permitted to use the bracketed legend only in the design documentation
intended for application in the USSR.” Should be replaced with the
following:
Tables П3.1 - П3.65 give two legends for a welded joint: the
main one and bracketed one. For the design documentation to be
used in Russia it is permitted to the bracketed legend.
Regulatory document
AMENDMENT № 1
to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power
Installations. Welding and Overlaying.
Basic Provisions”
Editor in charge Sinitsyna T.V.
Computer design Zernova E.P., Tarasova V.P., Chenykaev D.M.
Design by STID of SEC NRS of Gosatomnadzor of Russia
Telephone: 275-0023 ext. 22-24