(c) Required Impact Testing When Thermal Treatments
Are Performed. Impact tests are required at the test temperature in accordance with (a) but not warmer than
70°F (20°C) whenever thermal treatments79 within the
temperature ranges listed for the following materials
are applied:
(1) austenitic stainless steels thermally treated at
temperatures between 900°F (480°C) and 1650°F
(900°C); however, Types 304, 304L, 316, and 316L that
are thermally treated at temperatures between 900°F
(480°C) and 1,300°F (705°C) are exempt from impact
testing provided the MDMT is −20°F (−29°C) or warmer
and vessel (production) impact tests of the thermally
treated weld metal are performed for Category A and B
joints;
(2) austenitic‐ferritic duplex stainless steels thermally treated at temperatures between 600°F (315°C)
and 1,750°F (955°C);
(3) ferritic chromium stainless steels thermally treated at temperatures between 800°F (425°C) and 1,350°F
(730°C);
(4) martensitic chromium stainless steels thermally
treated at temperatures between 800°F (425°C) and
1,350°F (730°C).
(d) Exemptions from Impact Testing for Base Metals and
HAZs. Impact testing is not required for Table UHA-23
base metals for the following combinations of base metals
and HAZs (if welded) and MDMTs, except as modified in
(c):
(1) for austenitic chromium–nickel stainless steels as
follows:
(-a) having a carbon content not exceeding 0.10%
at MDMTs of −320°F (−196°C) and warmer;
(-b) having carbon content exceeding 0.10% at
MDMTs of −55°F (−48°C) and warmer;
(-c) for castings at MDMTs of −20°F (−29°C) and
warmer;
(2) for austenitic chromium–manganese–nickel
stainless steels (200 series) as follows:
(-a) having a carbon content not exceeding 0.10%
at MDMTs of −320°F (−196°C) and warmer;
(-b) having a carbon content exceeding 0.10% at
MDMTs of −55°F (−48°C) and warmer;
(-c) for castings at MDMTs of −20°F (−29°C) and
warmer;
(3) for the following steels in all product forms at
ð19Þ
MDMTs of −20°F (−29°C) and warmer:
(-a) austenitic ferritic duplex steels with a nominal material thickness of 3/8 in. (10 mm) and thinner;
(-b) ferritic chromium stainless steels with a nominal material thickness of 1/8 in. (3 mm) and thinner;
(-c) martensitic chromium stainless steels with a
nominal material thickness of 1/4 in. (6 mm) and thinner.
The nominal thickness of plates and pipes as defined
in Mandatory Appendix 3 shall be used for determining
the nominal material thickness for toughness requirements. For other product forms, the nominal material
thickness shall be determined as follows:
– castings: maximum thickness between two cast
coincidental surfaces
– hollow cylindrical forgings: maximum radial
thickness
– disk forgings: maximum thickness, including the
length of an integral hub if a hub is present
– weld neck flanges: the larger of the thickness of
the flange ring or the neck
Carbon content as used in (1) and (2) above is as specified by the purchaser and must be within the limits of
the material specification.
(e) Exemptions from Impact Testing for Welding Procedure Qualifications. For Welding Procedure Qualifications,
impact testing is not required for the following combinations of weld metals and MDMTs except as modified in
(c):
(1) for austenitic chromium–nickel stainless steel
base materials having a carbon content not exceeding
0.10% welded without the addition of filler metal, at
MDMTs of −155°F (−104°C) and warmer;
(2) for austenitic weld metal:
(-a) having a carbon content not exceeding 0.10%
and produced with filler metals conforming to SFA-5.4,
SFA-5.9, SFA-5.11, SFA-5.14, and SFA-5.22 at MDMTs of
−155°F (−104°C) and warmer;
(-b) having a carbon content exceeding 0.10% and
produced with filler metals conforming to SFA-5.4,
SFA-5.9, SFA-5.11, SFA-5.14, and SFA-5.22 at MDMTs of
−55°F (−48°C) and warmer;
(3) for the following weld metal, when the base metal
of similar chemistry is exempt as stated in (d)(3), then
the weld metal shall also be exempt at MDMTs of −20°F
(−29°C) and warmer:
(-a) austenitic ferritic duplex steels;
(-b) ferritic chromium stainless steels;
(-c) martensitic chromium stainless steels.
Carbon content as used in (2) above is for weld metal
produced with the addition of filler metal.
(f) Required Impact Testing for Austenitic Stainless
Steel Welding Consumables With MDMTs Colder Than
−155°F (−104°C). For production welds at MDMTs colder
than −155°F (−104°C), all of the following conditions shall
be satisfied:
(1) The welding processes are limited to SMAW,
SAW, GMAW, GTAW, and PAW.
(2) The applicable Welding Procedure Specifications
(WPSs) are supported by Procedure Qualification Records
(PQRs) with impact testing in accordance with the requirements of (a) or when the applicable PQR is exempted from impact testing by other provisions of this
Division.
223
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UHA-51
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ASME BPVC.VIII.1-2019
UHA-51 – UHA-60
ASME BPVC.VIII.1-2019
(h) Vessel (Production) Impact Tests
(1) For welded construction of duplex stainless
steels, ferritic stainless steels, and martensitic stainless
steels, vessel (production) impact tests in accordance
with UG-84(i) are required if the Weld Procedure Qualification requires impact testing, unless otherwise exempted by the rules of this Division.
(2) For welded construction of austenitic stainless
steels, vessel (production) impact tests in accordance
with UG-84(i) are required unless exempted in (-a) and
(-b) below.
(-a) At MDMTs of −155°F (−104°C) and warmer,
vessel (production) impact tests are exempted provided
that the impact test exemption requirements for the applicable Weld Procedure Qualification in (e) are satisfied.
(-b) At MDMTs colder than −155°F (−104°C) but
not colder than −320°F (−196°C), vessel (production) impact tests are exempted provided that the preuse test requirements in (f) are satisfied.
(-c) At MDMTs colder than −320°F (−196°C), vessel (production) impact tests or ASTM E1820 J I C tests
shall be conducted in accordance with (a)(3).
(i) Vessel (Production) Impact Tests for Autogenous
Welds in Austenitic Stainless Steels. For autogenous welds
(welded without filler metal) in austenitic stainless steels,
vessel (production) impact tests are not required when
both of the following conditions are satisfied:
(1) The material is solution annealed after welding.
(2) The MDMT is not colder than −320°F (−196°C).
(3) The weld metal (produced with or without the
addition of filler metal) has a carbon content not exceeding 0.10%.
(4) The weld metal is produced by filler metal conforming to SFA-5.4, SFA-5.9, SFA-5.11, SFA-5.14, and
SFA-5.22 as modified below.
(-a) Each heat and/or lot of welding consumables
to be used in production welding with the SMAW and
GMAW processes shall be pre‐use tested by conducting
impact tests in accordance with the requirements of (a).
Test coupons shall be prepared in accordance with Section II, Part C, SFA-5.4, A9.3.5 utilizing the WPS to be used
in production welding.
(-b) Each heat of filler metal and batch of flux combination to be used in production welding with the SAW
process shall be pre‐use tested by conducting impact tests
in accordance with the requirements of (a). Test coupons
shall be prepared in accordance with Section II, Part C,
SFA-5.4, A9.3.5 utilizing the WPS to be used in production
welding.
(-c) Combining more than one welding process or
more than one heat, lot, and/or batch of welding material
into a single test coupon is unacceptable. Pre‐use testing
in accordance with the requirements of (a) may be conducted by the welding consumable manufacturer, provided mill test reports are furnished with the
consumables.
(-d) The following filler metals may be used without pre‐use testing of each heat, lot, and/or batch, provided that procedure qualification impact testing in
accordance with UG-84(h) at the MDMT or colder is performed using the same manufacturer brand and type filler
metal: ENiCrFe‐2, ENiCrFe‐3, ENiCrMo‐3, ENiCrMo‐4,
ENiCrMo‐6, ERNiCr‐3, ERNiCrMo‐3, ERNiCrMo‐4,
SFA-5.4 E310‐15 or 16.
(-e) The following filler metals may be used without pre‐use testing of each heat and/or lot, provided that
procedure qualification impact testing in accordance with
UG-84(h) at the MDMT or colder is performed: ER308L,
ER316L, and ER310 used with the GTAW or PAW
processes.
(g) Exemption From Impact Testing Because of Low
Stress. Impact testing of materials listed in Table
UHA-23 is not required, except as modified by (c), for vessels when the coincident ratio of design stress 81 in tension to allowable tensile stress is less than 0.35. This
exemption also applies to the welding procedures and
production welds for the component.
UHA-52
WELDED TEST PLATES
(a) For welded vessels constructed of Type 405 material which are not postweld heat treated, welded test plates
shall be made to include material from each melt of plate
steel used in the vessel. Plates from two different melts
may be welded together and be represented by a single
test plate.
(b) From each welded test plate there shall be taken
two face‐bend test specimens as prescribed in Section
IX, Figure QW-461.2; these shall meet the requirements
of Section IX, QW-160.
MARKING AND REPORTS
UHA-60
GENERAL
The provisions for marking and reports in UG-115
through UG-120 shall apply without supplement to vessels constructed of high alloy steels.
224
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Copyright ASME International (BPVC)
Provided by IHS under license with ASME
No reproduction or networking permitted without license from IHS
Licensee=Khalda Petroleum/5986215001, User=Amer, Mohamed
Not for Resale, 07/02/2019 13:29:04 MDT