EUROPEAN STANDARD
EN 13480-5
NORME EUROPÉENNE
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EUROPÄISCHE NORM
May 2002
ICS 23.040.01
English version
Metallic industrial piping - Part 5: Inspection and testing
Tuyauteries industrielles métalliques - Partie 5: Inspection
et contrôle
Metallische industrielle Rohrleitungen - Teil 5: Prufüng
This European Standard was approved by CEN on 23 May 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
© 2002 CEN
All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.
B-1050 Brussels
Ref. No. EN 13480-5:2002 E
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
Contents
Foreword......................................................................................................................................................................4
1
Scope ..............................................................................................................................................................5
2
Normative references ....................................................................................................................................5
3
Terms and definitions....................................................................................................................................6
4
Symbols and abbreviations ..........................................................................................................................6
5
5.1
5.2
5.3
Determination of inspection and testing requirements .............................................................................6
General............................................................................................................................................................6
Classification of piping .................................................................................................................................6
Testing and inspection procedures .............................................................................................................7
6
6.1
6.2
6.2.1
6.2.2
6.2.3
6.3
6.3.1
6.3.2
6.3.3
6.3.4
6.4
6.5
Design validation ...........................................................................................................................................7
Objective and extent ......................................................................................................................................7
Documentation ...............................................................................................................................................7
General............................................................................................................................................................7
Design calculations .......................................................................................................................................7
Technical schedule........................................................................................................................................8
Performance of design review.....................................................................................................................9
System design review ...................................................................................................................................9
Review of design calculations......................................................................................................................9
Incomplete documentation ...........................................................................................................................9
Additional procedures/qualifications ..........................................................................................................9
Alternative proof of safety ............................................................................................................................9
Manufacturer’s declaration of design compliance ...................................................................................10
7
7.1
7.2
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.3
7.3.1
7.3.2
7.3.3
7.3.4
7.4
In-process inspection and testing .............................................................................................................10
General..........................................................................................................................................................10
Materials and formed pressure retaining parts ........................................................................................10
General..........................................................................................................................................................10
Verification of material ................................................................................................................................10
Verification of formed pressure retaining parts .......................................................................................10
Non-destructive testing of formed parts ...................................................................................................10
Destructive testing of formed parts ...........................................................................................................11
Welding .........................................................................................................................................................11
Welding approvals .......................................................................................................................................11
Inspection of welding set-up ......................................................................................................................12
Testing and inspection during welding .....................................................................................................12
Inspection after welding..............................................................................................................................12
Heat treatment ..............................................................................................................................................12
8
8.1
8.1.1
8.1.2
8.1.3
8.2
8.2.1
8.2.2
8.3
8.4
8.4.1
8.4.2
8.4.3
Non-destructive testing of welds ...............................................................................................................13
Application of NDT.......................................................................................................................................13
General..........................................................................................................................................................13
Examination of weld quality by sample inspection..................................................................................14
Imperfections revealed by sample inspection ..........................................................................................14
Circumferential butt, branch, fillet and seal welds...................................................................................16
Amount of examination ...............................................................................................................................16
Dissimilar metal joints.................................................................................................................................18
Longitudinal welds ......................................................................................................................................18
NDT Methods................................................................................................................................................18
General..........................................................................................................................................................18
Acceptance criteria......................................................................................................................................18
Personnel qualification ...............................................................................................................................21
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EN 13480-5:2002 (E)
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8.4.4
8.5
8.6
Selection of NDT method ............................................................................................................................22
Reports .........................................................................................................................................................22
Weld repairs .................................................................................................................................................22
9
9.1
9.2
9.2.1
9.2.2
9.2.3
9.2.4
9.3
9.3.1
9.3.2
9.3.3
9.3.4
9.3.5
9.4
9.5
9.5.1
9.5.2
9.5.3
9.5.4
Final assessment and documentation........................................................................................................23
General..........................................................................................................................................................23
Final inspection............................................................................................................................................23
General..........................................................................................................................................................23
Visual inspection before the proof test .....................................................................................................23
Visual inspection after the proof test ........................................................................................................23
Review of the manufacturing documents .................................................................................................24
Proof test ......................................................................................................................................................24
General..........................................................................................................................................................24
Hydrostatic pressure test ...........................................................................................................................24
Pneumatic pressure test .............................................................................................................................27
Other tests ....................................................................................................................................................28
Documentation of the proof test ................................................................................................................28
Inspection of safety systems......................................................................................................................28
Documentation.............................................................................................................................................28
Final documentation package ....................................................................................................................28
Design and manufacturing documentation package ...............................................................................30
Operating instructions ................................................................................................................................30
Documentation for the purchaser ..............................................................................................................30
10
Declaration/Certification .............................................................................................................................30
Annex A (informative) Inspection of safety systems ...........................................................................................31
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or
other provisions of EU directives. .............................................................................................................32
3
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
Foreword
This document (EN 13480-5:2002) has been prepared by Technical Committee CEN/TC 267 "Industrial piping and
pipelines", the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest
by November 2002.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
In this standard the Annex A is informative
This European Standard EN 13480 for metallic industrial piping consists of seven interdependent and not dissociable
parts which are:
Part 1: General.
Part 2: Materials.
Part 3: Design.
Part 4: Fabrication and installation.
Part 5: Inspection and testing.
Part 6: Additional requirements for buried piping.
CEN/TR 13480-7, Guidance on the use of conformity assessment procedures
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
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1
Scope
This Part of this European Standard specifies the requirements for inspection and testing of industrial piping as
defined in EN 13480-1:2002 to be performed on individual spools or piping systems, including supports, designed in
accordance with EN 13480-3 and prEN 13480-6 (if applicable), and fabricated and installed in accordance with
EN 13480-4.
2
Normative references
This Part of this European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the publications are
listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to
this Part of this European Standard only when incorporated in it by amendment or revision. For undated references
the latest edition of the publication referred to applies (including amendments).
EN 287-1, Approval testing of welders – Fusion welding – Part 1: Steels.
EN 288-2, Specification and approval of welding procedures for metallic materials -– Part 2: Welding procedure
specification for arc welding.
EN 473:2000, Non destructive testing - Qualification and certification of NDT personnel – General principles.
EN 571-1, Non destructive testing – Penetrant testing – Part 1: General principles.
EN 970, Non-destructive examination of fusion welds – Visual examination.
EN 1289:1998, Non-destructive examination of welds – Penetrant testing of welds – Acceptance levels.
EN 1290, Non-destructive examination of welds – Magnetic particle examination of welds
EN 1291:1998, Non-destructive examination of welds – Magnetic particle testing of welds – Acceptance levels.
EN 1418, Welding personnel – Approval testing of welding operators for fusion welding and resistance weld setters
for fully mechanized and automatic welding of metallic materials.
EN 1435:1997, Non-destructive examination of welds – Radiographic examination of welded joints.
EN 1712:1997, Non-destructive examination of welds – Ultrasonic examination of welded joints – Acceptance
levels.
EN 1713, Non-destructive examination of welds – Ultrasonic examination – Characterization of indications in welds.
EN 1714:1998, Non destructive examination of welds – Ultrasonic examination of welded joints.
EN 12062:1997, Non destructive examination of welds – General rules for metallic materials.
EN 12517:1998, Non-destructive examination of welds – Radiographic examination of welded joints – Acceptance
levels.
EN 13480-1:2002, Metallic industrial piping – Part 1: General.
EN 13480-2:2002, Metallic industrial piping – Part 2: Materials.
EN 13480-3, Metallic industrial piping – Part 3: Design and calculation.
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EN 13480-4:2002, Metallic industrial piping – Part 4: Fabrication and installation.
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prEN 13480-6, Metallic industrial piping – Part 6: Additional requirements for buried piping.
CEN/TR 13480-7, Metallic industrial piping – Part 7: Guidance on the use of conformity assessment procedures.
EN 25817:1992, Arc welded joints in steel – Guidance on quality levels for imperfections (ISO 5817:1992).
EN ISO 6520-1:1998, Welding and allied processes – Classification of geometric imperfections in metallic materials
– Part 1: Fusion welding (ISO 6520-1: 1998).
3
Terms and definitions
For the purposes of this Part of this European Standard, the terms and definitions given in EN 13480-1:2002 shall
apply.
4
Symbols and abbreviations
For the purposes of this Part of this European Standard, the symbols given in EN 13480-1:2002 apply together with
the following abbreviations:
LT
Leak test;
NDT
Non-destructive testing;
MT
Magnetic particle testing;
PT
Penetrant testing;
RT
Radiographic testing;
UT
Ultrasonic testing;
VT
Visual examination;
PWHT
Post-weld heat treatment.
5
Determination of inspection and testing requirements
5.1 General
The fabricator and/or installer shall be responsible for carrying out the testing, examinations and certification specified
in this European Standard, for all piping fabricated to EN 13480-4. These requirements are specified in clauses 6 to
10. Where required in the technical specification, additional examination and testing shall be performed.
NOTE
For guidance on the use of conformity assessment procedures see CEN/TR 13480-7.
5.2 Classification of piping
Industrial piping shall be classified in accordance with EN 13480-1:2002, Table 4.1-1.
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NOTE 1
Piping classes I to III are identical to categories I to III of the Pressure Equipment Directive.
NOTE 2
The requirements for classification of industrial piping that is to be installed in a Member State of the EU and which is
covered by the scope of the Pressure Equipment Directive and the appropriate conformity assessment are given in the Pressure
Equipment Directive.
5.3 Testing and inspection procedures
Testing and inspection shall be carried out by personnel trained for the method used. European Standards or
written procedures (if necessary) detailing the method and acceptance criteria shall be available to all testing
personnel and inspectors. Records shall be kept to demonstrate that all required testing and inspection have been
carried out and that the results are acceptable.
6
Design validation
6.1 Objective and extent
Before fabrication/installation commences, a validation of the piping design and its supports shall be performed.
The validation shall be carried out independently from the team that prepared the design, and independent from
fabrication/installation.
The design validation includes the pressure walls to the first joint with other pressurised components. It also
includes the interaction with components directly connected to the piping, but does not include validation of the
components themselves.
The design validation shall be performed to verify that the piping meets the requirements of this European
Standard with regard to materials, design details and dimensions, and that the requirements of procedures and
personnel can be met during fabrication.
Where the design of parts has already been validated in accordance with this European Standard, and where an
appropriate certificate or assessment report is available, a further design validation shall not be required.
6.2 Documentation
6.2.1
General
Documentation shall be provided to demonstrate compliance with this European Standard and shall include
construction drawings, parts lists, design calculations and the technical schedule for fabrication/installation.
6.2.2
Design calculations
Where calculations are performed by hand or with the aid of a computer, the following minimum data
6.2.2.1
shall be provided:
explanation of notations;
calculation input data, including material details;
reference number of the standard including the edition and reference number of the formula;
full traceability of the calculations performed;
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results of intermediate formulae;
calculated minimum thickness or the calculated stress compared with the design stress;
corrosion, wastage and other allowances where applicable;
thickness tolerances;
the selected thickness.
Where stress analysis is carried out by numerical methods, e.g. finite element method, boundary
6.2.2.2
element method or other design methods, it shall be documented.
Documentation shall include at least the following data:
explanation of notations;
details of the computer program;
assumptions for calculation;
calculation input data;
graphs for the geometric model, including boundary and compatibility conditions;
stresses, displacements and strains, where necessary;
the stresses in the most critical areas;
calculation of stress intensities compared with the design stress.
6.2.3
Technical schedule
The technical schedule shall consist of:
a detailed description of the fabrication/installation plan;
welding procedure specifications together with the welding procedure approval records;
NDT procedures;
heat treatment procedures, where applicable;
leak testing procedures, where applicable;
pressure test procedures where necessary;
any additional procedures specifically requested.
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6.3 Performance of design review
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6.3.1
System design review
A review of isometrics and/or construction drawings, including parts lists and technical schedules, shall be
performed with regard to operating conditions of the following items:
the suitability of the material for the pressurised and un-pressurised parts including the required material
inspection documents;
the suitability of welding procedure specifications and approvals;
suitability of weld joint design;
provision for appropriate in-service testing and inspection ,where necessary;
structural stability, including supports and fixed points;
provision and adequacy of safety devices.
The system design review shall be performed against the requirements of this European Standard.
6.3.2
Review of design calculations
The review of design calculations shall be carried out to verify that the dimensions specified meet the requirements
of EN 13480-3. The review shall also ensure that the stresses considered include pressure, temperature and that
all loads that may be applied during operating and testing have been considered.
6.3.3
Incomplete documentation
When all required data is not available at the time of the design validation, fabrication/installation may proceed
provided it shall not go beyond the applicable fabrication/installation stage, until approval is received.
6.3.4
Additional procedures/qualifications
Prior to the performance of the specific task involved, for piping class III the following shall be verified, preferably as
part of the design examination:
Approval of welders;
Qualification and certification of NDT personnel;
Procedures for finishing, e.g. cleaning, painting, insulation etc.
6.4 Alternative proof of safety
If the design proposed by the manufacturer has not been prepared by a method acceptable under the requirements
of EN 13480-3, then the manufacturer shall supply all the necessary information in support of the alternative design
approach. This may consist of mathematical analysis, proof test data, operating experience or any other data the
manufacturer considers relevant to support this method of design. The documents submitted shall be reviewed to
ensure that the design of the piping is as safe as that provided by this European Standard and include the
principles given in 6.3.
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6.5 Manufacturer’s declaration of design compliance
After validation of the design has shown that the design requirements of this European Standard have been
fulfilled, the piping manufacturer shall prepare a declaration that the design is in compliance with the requirements
of this European Standard.
NOTE
A specimen of the manufacturer’s declaration of design compliance is given in CEN/TR 13480-7.
A list of the relevant drawings shall be attached to the declaration.
7
In-process inspection and testing
7.1 General
Examinations and tests specified in EN 13480-5 shall be carried out by personnel trained for the method used.
European Standards or written procedures (where necessary) detailing the method and acceptance criteria shall be
available.
7.2 Materials and formed pressure retaining parts
7.2.1
General
The testing and inspection specified below shall be restricted to parts formed during the fabrication process,
especially induction bending. Formed bought out standardized parts and components shall not be a part of this
requirement.
7.2.2
Verification of material
A verification shall be performed that materials are in accordance with the specified material standard or purchase
order.
7.2.3
Verification of formed pressure retaining parts
It shall be verified that all formed pressure retaining parts comply with the specified shape and dimensional
requirements, and have received the specified finish or heat treatment.
7.2.4
Non-destructive testing of formed parts
All formed parts shall be subject to non-destructive testing.
The examination shall include, if appropriate:
wall thickness measurements;
dimensional checks (ovality, angle of bend etc.);
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EN 13480-5:2002 (E)
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hardness tests;
ultrasonic examination for volumetric (internal) imperfections in longitudinal and transversal direction;
examination for surface or near surface imperfections (magnetic particle or penetrant examination);
replicas of the surface structure in the tension zone (in case life monitoring is required for creep range
applications),
on each component or batch of identical components (dependent on the material and piping category).
Material, heat treatment conditions, heat treatment lot, degree of deformation shall be considered in the definition
of the batch.
7.2.5
Destructive testing of formed parts
Testing shall be performed to verify the heat treatment of the formed parts, and shall include:
tensile test;
hot tensile test (where items are being used in the creep range);
notch impact test;
micrographs (e.g. 9 % or 12 % Cr steels);
other tests specified in EN 13480-2:2002 or in a European Standard for base material.
One set of test per cast, wall thickness range and heat treatment lot shall be performed for piping of piping
category II and III. The tests shall be performed on test pieces from the end of the component itself, or from test
pieces placed together with the components in the heat treatment furnaces.
7.3 Welding
7.3.1
Welding approvals
The following shall be verified:
Welding procedure specifications (WPS) in accordance with EN 288-2, established for all welding activities
including tack welds and temporary attachment welds;
Approval of all WPS to EN 13480-4.;
Appropriate and current approval of all welders in accordance with EN 287-1 and all welding operators in
accordance with EN 1418.
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7.3.2
Inspection of welding set-up
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Prior to carrying out any welding, each weld preparation shall be visually inspected. The inspection shall verify
compliance with the drawing and WPS, by ensuring the following:
the correct materials are used;
dimensions are within tolerance, including position, alignment, and orientation of branches, nozzles,
attachments and anchors, etc.;
cleanliness and freedom from imperfections which may give rise to defects in the completed joint;
nozzles, branches etc., properly fit the curvature of the pipe;
tack welds that are to be incorporated into the final weld are free from cracks or other defects.
7.3.3
Testing and inspection during welding
The following testing and inspection shall be carried out, where appropriate, at suitable stages during the welding
operation to verify that the specified WPS is being followed for:
a)
correct preheat;
b)
correct welding process;
c)
correct welding consumables;
d)
correct electrical characteristics;
e)
correct interpass temperature and cleaning;
f)
other requirements of the WPS;
g)
all tack welds and temporary attachments are welded in accordance with an approved WPS.
7.3.4
Inspection after welding
The following inspection shall be carried out on completion of welding:
a)
examination for compliance with drawings;
b)
verification that welds are correctly identified and traceable to the welder/operator;
c)
verification that temporary attachments have been properly removed.
7.4 Heat treatment
For post-forming and post-weld heat treatment (PWHT), where applicable, it shall be verified by a review of the
heat treatment charts or by a hardness test, that the heat treatment carried out complies with the material
specification or to the appropriate heat treatment procedure.
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8
Non-destructive testing of welds
8.1 Application of NDT
8.1.1
8.1.1.1
General
The following shall be applicable to all welded joints:
a) Welded joints shall be visually examined in accordance with EN 970 before any other NDT is performed;
b) The area to be examined shall include the weld metal and the heat affected zones;
c) Surface examination stipulated in Table 8.2-1 shall be performed on the outer surface;
d) Where a welded joint is to be subsequently formed or heat treated, the required NDT shall be carried out on the
weld in the final condition. If a weld will not be accessible for examination after heat treatment or forming, the
parties involved shall agree on a suitable alternative;
e) NDT-method used and acceptance criteria for all NDT shall be in accordance with Table 8.4-1;
f)
In case of austenitic base or filler material, the method for surface testing shall be PT.
Arc strikes and contact points with fused material shall be ground smooth and subjected to surface
8.1.1.2
examination appropriate to the material used.
8.1.1.3
Surface condition and preparation for non-destructive testing
The following criteria shall be met:
a) RT: surface dressing is required where ripples or weld surface irregularities will interfere with the interpretation
of the radiographs;
b) UT: surface dressing is required where the surfaces in contact with the probe prevent the scanning process;
c) MT: where necessary surface dressing is required to remove foreign matter to permit an accurate interpretation
of the indications.
d) PT: where necessary surface dressing is required to remove foreign matter to permit an accurate interpretation
of the indications.
NOTE
Care should be taken to avoid masking of flaws by any surface dressing process.
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8.1.2
Examination of weld quality by sample inspection
Where the required extent of non-destructive testing is less than 100 %, the specified NDT techniques shall be
employed at the earliest stage practicable in the fabrication process to ensure that sound welds are achieved. The
timing shall be agreed between the parties involved. Sample joints to be examined shall be:
randomly selected;
representative of a group of welds.
At least one complete sample joint shall be examined over the whole circumference of the joint.
Where the number of sample joints required is small, combinations of thicker sections and smaller diameters or
thinner sections and greater diameters shall be given preference.
NOTE
A group of welds is a quantity of welds, welded by one welder or welding operator, in accordance with a specific
welding procedure specification.
8.1.3
Imperfections revealed by sample inspection
When sample inspection reveals imperfections in a weld which are not acceptable to this European Standard, the
following shall apply:
a)
Two additional welds of the same group shall be examined by the same method;
b)
If these additional welds are acceptable, the initial weld shall be repaired or replaced and re-examined by the
original method;
c)
If any one of these additional welds reveal an unacceptable imperfection, all welds in that group shall be fully
examined and, as necessary, repaired or replaced and re-examined.
The procedure illustrated in Figure 8.1-1 shall be followed.
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start
random testing
welds
acceptable ?
yes
no
test 2 additional welds
yes
additional
welds
acceptable ?
no
test all welds of that group
repair tested welds with
unacceptable imperfections and
re-examine
welds
acceptable ?
yes
end
no
Figure 8.1-1 — Flow diagram of additional testing required when imperfections have been revealed
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8.2 Circumferential butt, branch, fillet and seal welds
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8.2.1
Amount of examination
The type of NDT required and its extent shall be determined in accordance with Table 8.2-1, taking into account the
piping category the piping is classified to.
The following additional conditions shall apply:
a)
For piping where creep or fatigue is the controlling factor in design, it shall be assigned to piping category III
for determining the extent of NDT, irrespective of PS and DN;
b)
For piping in material groups 1.1, 1.2, and 8.1, in piping classes I or II, volumetric testing shall be a minimum
of 10 % of circumferential butt and branch welds irrespective of PS and DN, if the piping is > DN 25 and
contains very toxic or extremely flammable fluids;
c)
Where the specified NDT level is 5 %, this shall apply to the first 100 welds made. Where no unacceptable
imperfections are identified in this sample, the level of testing may be reduced to an overall level of 2 %.
However, the minimum number of welds examined shall be 5. All other requirements given in 8.1.2 shall
apply;
d)
For the circumferential welds or where the calculated stresses across the weld (as determined using
EN 13480-3) are below 70 % of the nominal design stress for the design conditions, the amount of testing may
be reduced by 50 % of the values given in Table 8.2-1;
e)
Piping for steam and superheated water (water at a pressure greater than 0,5 bar and at a temperature equal
to or greater than 110 C) shall be subject to the following NDT:
where PS · DN 5 000, 100 % volumetric testing of butt and branch welds;
where PS · DN 3 500, 25 % volumetric testing of butt and branch welds;
together with other testing specified in Table 8.2-1 for the combination of material, piping category and
thickness;
NOTE For piping operating at 100 C or more, at least 10 % of socket welds should be radiographed to confirm that an
adequate expansion gap has been achieved.
f)
16
For the selection of the appropriate NDT method for volumetric testing, see Table 8.4-4.
e
d
c
b
a
III
II
I
III
II
I
III
II
I
Piping Class
100
100
100
VT
%
All
welds
30
> 30
30
> 30
30
> 30
30
> 30
30
> 30
30
> 30
en b
mm
5
10
5
10
5
10
10
25
25
25
100
100
MT/PT c
%
Surface testing
10
10
10
10
25
25 d
25
25
25
25 d
100
100 d
10
5
5
Volumetric
testing
RT/UT
%
Circumferential welds
Only if PWHT has been carried out.
Additional testing for transverse defects from weld surface (see 8.4.4.2).
For ferritic materials preference shall be given to MT.
All
All
All e
All
100
25
10
10
Nil
All
> DN 100
All
> DN 100
All
> 15
> 15
en b
mm
100
25
10
Nil
10
Nil
RT/UT
%
Volumetric testing
Branch welds
en MT/PT c Branch
Branch
diameter mm
diameter
%
Surface testing
For the selection of the appropriate NDT-method for volumetric testing, see Table 8.4.2.
Material group, see CR ISO 15608.
1.3, 1.4
2.1, 2.2
4.1, 4.2
8.2, 8.3
9.1, 9.2, 9.3
10.1, 10.2
3.1, 3.2, 3.3
5.1, 5.2, 5.3
5.4, 6.1, 6.2,
6.3, 6.4, 7.1,
7.2, 11
1.1
1.2
8.1
Material
group a
Table 8.2-1 — Extent of testing for circumferential, branch, fillet and seal welds
All
All
All e
All
en
mm
100
25
25
10
10
Nil
MT/PT
%
All
All
All e
All
en
mm
100
10
25
5
10
Nil
MT/PT
%
17
EN 13480-5:2002 (E)
Issue 1 (2002-05)
Socket/fillet
Seal welds
welds
Surface testing Surface testing
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
8.2.2
Dissimilar metal joints
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The test methods and extent of testing for joints between ferritic and other materials (e.g. austenitic, nickel-based
alloys) shall be according to the highest material group which is applicable to the base materials.
8.3 Longitudinal welds
Longitudinal welds, except those in components made to material specifications acceptable to this European
Standard, shall be subject to the level of NDT appropriate to the joint coefficient required (see Table 8.3-1).
Table 8.3-1 — Extent of NDT for longitudinal welds
Joint coefficient
z
z 0,7
0,7 < z 0,85
0,85 < z 1,0
VT
MT or PT a
RT or UT b
%
100
100
100
%
0
10
100
%
0
10
100
a for ferritic materials preference shall be given to MT.
b see Table 8.4-3
8.4 NDT Methods
8.4.1
General
The NDT methods specified in the following clauses shall be performed in accordance with written NDT procedures,
and, where appropriate, with NDT instructions.
8.4.2
Acceptance criteria
The acceptance criteria for the NDT techniques shall follow the European Standards in Table 8.4-1. Requirements for
acceptance criteria for surface imperfections are given in Table 8.4-2 and additional requirements for acceptance
criteria for internal imperfections detected by RT are given in Table 8.4-3.
Table 8.4-1 — NDT techniques, method, acceptance criteria
NDT Technique
(abbreviation)
Visual Examination (VT)
Radiographic Testing (RT)
Method
Acceptance Criteria
EN 970
EN 1435:1997, class B a b
Ultrasonic Testing (UT)
EN 1714:1998, class B b
Penetrant Testing (PT)
EN 571-1
Magnetic Particle Testing (MT)
EN 1290
Table 8.4-2
EN 12517:1998
Acceptance level 2 and additional
requirements of Table 8.4-3
EN 1712 :1997, c
Acceptance level 2 d
EN 1289 :1998,
Acceptance level 1
EN 1291 :1998,
Acceptance level 1
a However, the maximum area for single exposure shall correspond to the requirements of EN 1435:1997, class A.
b Class A for material group 1.1, 1.2, 8.1 when piping class is I or II.
c For the characterization of indications EN 1713 may be used.
d Acceptance level 3 for material group 1.1, 1.2, 8.1 when piping class is I or II.
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
Table 8.4-2 — Acceptance criteria for surface imperfections
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Identification of surface imperfection
EN ISO 6520-1
:1998,
Reference
number
Designation
Maximum permitted imperfection
EN 25817:
1992
Reference
number
Additional requirements
Piping class in accordance with
EN 13480-1:2002, Table 4.1-1
III
II
a
I
EN 25817:1992, quality level
1001-1064
Cracks (all)
2011-2017
2021-2024
Gas cavity (all)
Shrinkage cavity (all)
1
3 to 5
Not permitted
B1)
B
C
1
) When occurring at the surface,
- diameter = 2 mm and
- depth = 1 mm
with additional conditions that:
- it does not occur at a stop or restart
- it is not systematic on the same weld for
pressure welds or load carrying attachment
welds.
3011-3014
3021-3024
303
3041-3043
Slag inclusions (all)
Flux inclusions (all)
Oxide inclusions
Metallic inclusions (all)
4011-4013
Lack of fusion (all)
6
6
6
6,7
Not permitted
8
Not permitted
402
Lack of penetration
9
5011-5012
Undercut
11
shall be removed e. g. by grinding
Not permitted
B2)
C
If a full penetration weld is required
C
2
) t 16 mm :
6 mm t < 16 mm:
t < 6 mm:
h 0,5 mm for long
imperfections
h = 0,3 mm for long
imperfections;
h = 0,5 mm for
short imperfections
h < 0,3 mm for
short imperfections
5013
Shrinkage grove
21
B
C
C
502
Excessive weld metal
12
B
C
C
Smooth transition is required.
Weld toe angle 120
503
Excessive convexity
13
C
C
C
Same as for 502
504
Excess penetration
16
B
C
C
5041
Local excess penetration
17
B
B
C
506
Overlap
22
507
Linear misalignment
18
See EN 13480-4
508
Angular misalignment
-
See EN 13480-4
509
Sagging
19
B
B
B
511
Incompletely filled groove
19
B
B
B
512
Excessive asymmetry of
fillet welds
Excessive asymmetry of
fillet welds
Root concavity
20
D
D
D
20
D
D
D
21
B
B
B
512
515
Not permitted
Long imperfection: not permitted
(continued)
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
Table 8.4-2 (concluded)
Identification of surface imperfection
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EN ISO 6520-1
:1998,
Reference
number
Designation
Maximum permitted imperfection
EN 25817:
1992
Reference
number
Piping class in accordance with
EN 13480-1:2002, Table 4.1-1
III
II
I
Additional requirements
a
EN 25817:1992, quality level
516
Root porosity
-
Not permitted
517
Poor restart
23
Not permitted
601
Stray flash
24
Not permitted
shall be removed, e.g. by grinding plus MT or PT
or ensure that no crack is left
602
Spatter
25
Not permitted
NOTE: in the special case of circumferential
welded fins which are attached to tubes by a
mechanised welding process, spatter shall be
minimised, but any produced may remain,
regardless of the material or heat treatment
involved.
603
Torn surface
-
Not permitted
shall be ground, a smooth transition is required.
604
Grinding mark
Not permitted
shall be ground flash, a smooth transition is
required
605
Chipping mark
Not permitted
shall be ground flash, a smooth transition is
required.
606
Under flushing
Not permitted
any local underflushing shall be related to the
design characteristics (calculated thichness +
corrosion allowance = minimum thickness for
base material)
(Thickness shall be measured by ultrasonic
method)
a Symbols according to EN 25817:1992.
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
Table 8.4-3 — Additional requirements for acceptance criteria for internal imperfections detected by RT
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Identification of internal imperfection
EN
ISO 6520-1
:1998
Reference
number
Maximum permitted imperfection
EN 25817:
1992
Reference
number
Designation
Piping class in accordance with
EN 13480-1:2002, Table 4.1-1
III
II
Additional requirements
a
I
EN 25817:1992, quality level
1001-1064
Cracks (all)
2011-2016
Gas cavity (all)
1
3-5
Not permitted
B
B
C
For No 2012, the distance between two pores
shall always be greater than twice the diameter
of the bigger one, and not less than 4 mm (to
ensure that there is no chance of having a lack of
fusion)
For No 2014 same as for uniformly distributed
pores.
For No 2015 and 2016 l = 0,3 t, maximum 5 mm,
and w = 2 mm
2021-2024
Shrinkage cavity (all)
-
Not permitted
3011-3014
3021-3024
303
Slag inclusions (all)
Flux inclusions (all)
Oxide inclusions
6
1)
1) w = 0,3 t, maximum 3 mm and depending of
the application:
1 < t 25 mm
In case of several line at slag inclusions with a
distance between 2 of them less than twice the
longest of them, the total length is to be
considered as a defect.
3042
Metallic inclusions (copper)
7
Not permitted
3041 and
3043
Metallic inclusions (all
others)
-
2)
4011-4013
Lack of fusion (all)
8
Not permitted
402
Lack of penetration
9
–
Multiple imperfections
any cross section
in
26
2) Same as for gas cavities No 2011 – 2012 –
2013
Not permitted
B
If a full penetration weld is required
B
B
a Symbols according to EN 25817:1992, w = maximum size of cavity
8.4.3
Personnel qualification
Testing shall be carried out by an individual certified to at least EN 473:2000, level 1, under the supervision of
personnel certified to level 2 or level 3 who shall also be responsible for the evaluation of the results.
Visual examination shall be performed and evaluated by an individual with sufficient knowledge and experience with
the relevant standards and specifications. Certifications in accordance with EN 473 are not required.
Ultrasonic testing shall be performed and evaluated by an individual certified to at least EN 473:2000, level 2.
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
8.4.4
Selection of NDT method
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8.4.4.1
Surface testing
For the selection between MT or PT, see 8.1.1.1 f) and also footnote c in Table 8.2-1.
The term “visual examination” shall be understood to mean observation of the portion of components, joints, and
other piping elements and supports that are or can be exposed to view before, during, or after manufacture,
fabrication, assembly or installation.
NOTE This examination may include verification of dimensions, weld edge, joint preparation, alignment, joining (welding,
bonding, brazing, or other methods of joining) supports, assembly and installation.
8.4.4.2
Volumetric testing
Depending on wall thickness, type of weld and type of material, the NDT method shall be selected according to
Table 8.4-4.
Table 8.4-4 — Selection of NDT techniques for detection of welding imperfections (volumetric testing) in
full penetration joints, based on EN 12062:1997
Parent Material Nominal Thickness (e in millimetres)
Material and Type
of Joint
e<8
8 e < 15
15 e < 40
e 40
Ferritic
Butt Joints
RT
RT or (UT)
RT or UT
UT or (RT)
Ferritic
T-Joints
RT
RT or (UT)
RT or UT
UT or (RT)
Austenitic
Butt Joints
RT
RT
RT or (UT )
Austenitic
T-Joints
RT
RT
RT or (UT )
NOTE
a
a
UT or RT
a
a
UT or RT
a
Where two techniques are shown, the least preferred is shown between brackets
UTD (in accordance with EN 1714:1998, class D) requires a specific written instruction
8.5 Reports
Reports of non-destructive testing shall be drawn up in accordance with the European Standard for the testing
method.
8.6 Weld repairs
Procedures for weld repair shall be in accordance with EN 13480-4 and shall be submitted to the inspector for
review and approval prior to commencement of the repair.
Weld imperfections, which have been assessed as weld defects, shall be repaired in accordance with EN 13480-4
and inspected again after repair.
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
NOTE
The inspector may require additional inspections during the repair.
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Where imperfections are identified but cannot be adequately evaluated, an alternative test shall be performed or
the imperfection repaired.
The maximum allowable number of subsequent repairs shall be in accordance with EN 13480-4.
9
Final assessment and documentation
9.1 General
Prior to final certification, the manufacturer shall carry out a final assessment to verify that the piping system has
been manufactured in compliance with all specified requirements. The required documentation shall then be
compiled.
9.2 Final inspection
9.2.1
General
The final inspection shall consist of the following:
a visual inspection before the proof test;
a visual inspection after the proof test;
review of the manufacturing documents.
All testing and inspections shall be documented.
9.2.2
Visual inspection before the proof test
A visual inspection shall be carried out externally and internally, where possible, prior to completion of the external
coating. The visual inspection shall verify that:
dimensions and orientations comply with design requirements of the piping system;
components, supports, assembly and installation comply with the other requirements of the design
specification and this European Standard.
9.2.3
Visual inspection after the proof test
The visual inspection shall verify that there has been no deterioration resulting from the proof test:
all blank flanges, fitted to isolate components not subject to pressure test, e.g. safety valve escape piping,
bellows or expansion joints, etc. shall have been removed;
safety valves or relief devices required by the design or this standard shall have been correctly installed and
are of the specified capacity and type. Any gauges fitted to these devices for the purpose of pressure testing
shall have been removed.
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
9.2.4
Review of the manufacturing documents
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The manufacturer shall carry out a review of the manufacturing documents to verify that all applicable examinations
and tests specified in clauses 7 to 9 have been satisfactorily performed and reported.
9.3 Proof test
9.3.1
General
All piping constructed in accordance with this European Standard shall be subjected to a proof test to demonstrate
the integrity of the finished product. The proof test shall always be carried out, under controlled conditions, with
appropriate safety precautions and equipment, and in such a way that the persons responsible for the test are able
to make adequate inspections of all pressurised parts.
The proof test shall be a hydrostatic pressure test, except where a hydrostatic pressure test is harmful or
impractical. In these instances, a pneumatic pressure test (see 9.3.3) or other tests (see 9.3.4) shall be performed.
The proof test shall be made when required.
9.3.2
Hydrostatic pressure test
9.3.2.1
Basic requirements for hydrostatic pressure tests
Where practicable, the finished piping system shall be pressure tested after the installation has been
9.3.2.1.1
completed and all inspections have been performed. If it is not practicable, due to size or mode of manufacture, to
pressure test a complete piping system, the test procedure to be followed shall be agreed at the design stage.
All joints shall be left uninsulated and unlined and exposed for examination during pressure testing,
9.3.2.1.2
except that joints and tubes previously tested in accordance with this standard may be insulated or covered.
Painting for corrosion protection shall be permitted, provided, it does not prevent the clear examination of the joint
under test.
Piping designed for vapour or gas shall be provided with additional temporary supports, if necessary,
9.3.2.1.3
to support the weight of the test liquid.
Expansion joints shall generally be pressure tested in both, the manufacturers shop and in place in the
9.3.2.1.4
piping system. They shall be subjected to a test pressure according 9.3.2.2.1. If the test pressure
ptest > 1,5 PS E20/Ec
(9.3.2-1)
expansion joints may be provided with restraints to stabilise the bellows against squirm whilst being tested,
where
EC is the modulus of elasticity at design temperature.
E20 is the modulus of elasticity at 20 °C;
PS is the maximum allowable pressure in bar;
ptest is the test pressure in bar;
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
Equipment which is not to be tested shall be either disconnected from the piping or isolated by blank
9.3.2.1.5
flanges or other means during the test.
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NOTE
A valve may be used, provided the valve (including its closure mechanism) is suitable for the test pressure.
No piping shall be subject to any form of shock loading such as hammer testing when undergoing
9.3.2.1.6
pressure testing.
When dial indicating and recording pressure gauges are used, the dial shall be graduated over a range
9.3.2.1.7
of approximately double the intended maximum pressure, but in no case shall the range be less than 1,5 or more
than 4 times that pressure.
When components are to be pressure tested, the indicating gauges shall be connected to the
9.3.2.1.8
component, or to the component from a remote location, with the gauges readily visible to the operator controlling
the pressure throughout the duration of pressurising, testing and depressurising or venting of the component.
NOTE 1
For large piping systems where more than one gauge is specified or required, a recording type gauge is
recommended.
NOTE 2
It is recommended that a small pressure relief valve set to 1,1 times the test pressure is attached to the pressure
test system in order to avoid excess pressure being developed.
All indicating and recording type gauges used shall be calibrated to the appropriate gauge standard.
9.3.2.1.9
9.3.2.1.10 Piping which has been repaired following the hydrostatic pressure test shall be subjected again to the
specified pressure test after completion of the repair and any required post-weld heat treatment, unless otherwise
agreed between the parties involved.
9.3.2.2
Detailed requirements for the hydrostatic pressure test
The test pressure shall be not less than the greater of the two values determined by the following:
9.3.2.2.1
ptest = 1,25 PS
f test
f
(9.3.2-2)
or
p test = 1,43 PS
(9.3.2-3)
where
f
2
is the nominal design stress for design conditions at design temperature, in N/mm ;
2
f test is the nominal design stress for design conditions at test temperature, in N/mm ;
PS
is the design pressure of the piping spool, in bar ;
p test is the test pressure, in bar.
25
EN 13480-5:2002 (E)
Issue 1 (2002-05)
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In all cases for each component of the piping the test pressure shall be limited to such a level that it does not
generate a design stress greater than that given in EN 13480-3 for testing conditions, by reducing, if necessary, the
test pressure.
NOTE 1
This condition may be waived in those cases of different materials, where the hydrostatic pressure test would
necessitate a redesign or where the pressure test can lead to an overloading of bolts during the pressure test.
In cases where piping is operated in the creep range, further considerations shall be taken into account.
The applied test pressure shall include the amount of any static head acting in service and in testing at the point
under consideration.
NOTE 2
However, the static pressure caused by the content of the piping during service and/or testing does not need to be
taken into account if it does not increase the stress in the wall by more than 5 %.
For each piping spool, the test pressure shall be limited to such a level that it does not generate a design stress
greater than that given in EN 13480-3 for the test conditions by reducing, if necessary, the test pressure. For further
details, see EN 13480-3.
It shall be ensured that the structures, which are not provided by those responsible for the supply of the piping
system, are able to support the loads created by the hydrostatic test.
Prior to the hydrostatic test, the strength of temporary supports shall be verified.
Air pockets in the piping system shall be avoided. Means shall be provided to prevent air pockets in pipe sections
under test.
As a general rule, the hydrostatic test shall be performed with water. The quality of the water shall be such as to
prevent both corrosion and any residual impurities.
NOTE 3
In most cases the hydrostatic test may be performed with general supply water.
For hydrostatic tests of austenitic stainless steel piping systems, the halogen concentration of the water shall be
-6
controlled and shall not exceed a volume fraction of 50 × 10 .
The pressurizing fluid shall have a temperature sufficiently high that the risk of brittle fracture is avoided, see
EN 13480-2:2002.
Where a pressurising fluid other than water is used, care shall be taken to identify any additional hazards
associated with the fluid. All of the following conditions shall be satisfied: the pressuring medium shall
be non toxic;
have a flash-point 60 C or above (closed cup test) and shall not be utilised within 25 C of that flash point;
have a temperature at least 10 C below atmospheric boiling temperature and at least 5 C above solidification
point.
NOTE 4
For drinking water supply piping, drinking water should be used for the pressure test.
Heavy walled piping shall not be pressurised until the metal temperature is approximately equal to that of the
pressurisation medium. If the toughness of the material, or of the component, imposes a limit on the test
temperature or on the rate at which the pressure is increased, account shall be taken of this and documented in the
test data certificate.
26
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
The pressure of piping under test shall be increased to a value of approximately 50 % of the specified
9.3.2.2.2
test pressure. Thereafter, the pressure shall be increased in steps of approximately 10 % of the specified test
pressure until it is reached. The piping system shall be held at the test pressure for a period of at least 30 min. The
pressure shall then be reduced to the design pressure and all components and welded joints subjected to a close
visual examination of all surfaces and joints. During this examination, the piping shall show no signs of general
plastic yielding.
During the hydrostatic test, the external surface of the piping system shall be kept in such a condition
9.3.2.2.3
that leaks can be detected.
The hydrostatic test shall be passed if no leakage or visible plastic deformation is observed.
The details of the hydrostatic test shall be documented.
The pressure shall be relieved before draining. Where vacuum conditions can occur when draining thin
9.3.2.2.4
wall piping, venting shall be provided to prevent its collapse.
9.3.3
Pneumatic pressure test
Pneumatic tests shall only be permitted in cases where a hydrostatic pressure test is detrimental to the piping system
or is not practical, i.e.
for piping that is to be used in processes where even small traces of liquid are intolerable ;
following consultation at the design stage on the adequacy of the safety precautions proposed by the piping
manufacturer.
The requirements of 9.3.1 shall be fulfilled.
Due to the hazard involved in pressure testing using a compressible medium, special consideration shall be given to
factors such as :
a)
location of the piping system and its position relative to other buildings, plants, public roads, and areas open to
public and all other equipment and structures in the vicinity of the piping system to be tested;
b)
maintaining during the test the highest practicable standards of safety and ensuring that only personnel
involved in the testing have access to the testing area, that if the testing is not performed in a special room the
region in the immediate vicinity of the testing area is sealed off and warning signs used highlighting the danger
zone and prohibited area;
c)
NDT by MT or PT from the inner surface of the welds which have not been subjected 100 % volumetric testing
as required for the longitudinal seams. If the inner surface is not accessible UT shall be performed before the
pressure test. The amount of testing shall be 10 % of all circumferential welds including all butt joints of the
piping under consideration;
NOTEConsideration may be given to the use of acoustic emission.
d)
resistance of the piping system materials to fast fracture and the absolute necessity of avoiding brittle fracture.
e) metal temperature at which shall be at least 25 C above the brittle fracture temperature required in EN 134802:2002, Annex B for piping systems. Attention is drawn to the fact that if the gas pressure is reduced to the
piping system under test from high pressure storage, its temperature will fall. Therefore the equipment provided
by the piping systems manufacturer shall be such that the temperature of the gas entering the piping systems
exceeds the minimum temperature indicated.
f)
the extent of remote monitoring provided during the test.
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EN 13480-5:2002 (E)
Issue 1 (2002-05)
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The test pressure shall be in accordance with 9.3.2.2
The pressure shall be gradually increased to a value of 50 % of the required test pressure. Thereafter the pressure
shall be increased in steps of approximately 10 % of the required test pressure until this is reached. The pressure
shall then be reduced after 10 min to the inspection pressure pi.
pi = ps
fa
ft
(9.3.3-1)
and held during the inspection of the piping.
9.3.4
Other tests
In cases where a hydrostatic or pneumatic pressure test of individual welds (connection welds) would be detrimental
or impractical they shall be substituted by an appropriate non-destructive test (100 % RT or UT and 100 % PT or MT)
subject to agreement between the parties involved. If for specific materials, e.g. glas linings, the calculated stresses in
the piping are lowered to less than 70 % of the nominal stress for the design condition of the steel structure, this may
be taken into account when the test pressure and the amount of non-destructive testing is specified. The results of
this testing shall achieve the same level of safety.
Consideration shall be given to final testing at an early stage in the design cycle, so that arrangements can be
made to ensure that the individual component receive an appropriate test.
9.3.5
Documentation of the proof test
The essential data of the proof test shall be confirmed in a test certificate. Where the proof test is not carried out using
water, the test medium used shall be recorded.
9.4 Inspection of safety systems
For inspection of safety systems see Annex A.
9.5 Documentation
9.5.1
Final documentation package
The final documentation package shall contain the design and manufacturing documentation package and the
operating instructions. The content of the final documentation package shall be as specified in Table 9.5-1.
NOTE
28
The final documentation may contain copies of the original documents, except for documents no. 14 to16.
EN 13480-5:2002 (E)
Issue 1 (2002-05)
Table 9.5-1 — Final documentation
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No.
Documents
Clause
1
Piping and instrumentation diagram (P &
I diagram)
2
Summary of
conditions
3
Drawings of the layout of the piping and
piping supports with dimensions, (may
include isometric drawings, as built
drawings, views, ground layouts).
design
and
6.2
operating
6.2
Piping class
Piping below
0,5 bar
III
II
I
0
a
a
a
a
a
a
6.3.1
4
Parts lists for piping components with
dimensions, standards, materials
6.2
a
a
–
5
Material certificates for base materials
and welding consumables, if required
7.2.2
a
See EN
13480-2
–
6
Documentation
for
miscellaneous
components,
e.g.
valves,
safety
equipment
6.3.1
a
a
a
7
Welding documents
6.2.3
a
a
–
8
NDT documents
6.2.2
8.8
–
–
9
Heat treatment documents
6.2.2
–
–
10
Pressure test
documents
6.2.2
a
–
11
Marking information
EN
13480-4:
2002,
11.2
12
Declaration of design compliance
6.5
–
–
13
Declaration of compliance for piping
fabrication/installation
10
–
–
14
Pressure test certificate
9.3.4
–
–
15
Declaration of compliance
10
–
–
16
Operating instructions
9.5.3
or
equivalent
test
a
a dependant on manufacturer's decision
29
EN 13480-5:2002 (E)
Issue 1 (2002-05)
9.5.2
Design and manufacturing documentation package
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The manufacturer shall compile a design and manufacturing documentation package in such a way that the design
and manufacture of the piping may be assessed against the requirements of this standard and the agreed design.
9.5.3
Operating instructions
The manufacturer shall compile operating instructions for the user, containing all necessary information relating to
putting into service, operation and proposed maintenance and user in-service-inspections of the piping system.
The operating instructions shall cover the design data and main dimensions of the piping delivered as well as the
information contained in the marking. Where appropriate, these instructions shall also include those documents,
drawings and diagrams which are necessary for a full understanding of the operation instructions.
9.5.4
Documentation for the purchaser
A copy of the final documentation package shall be delivered to the purchaser after completion of the contract. In
accordance with the agreement between the parties concerned the design and manufacturing documentation
package may be delivered in full or parts thereof.
10 Declaration/Certification
The compliance of the piping design, fabrication, installation and pressure testing with EN 13480 shall be
declared/certified separately.
On satisfactory completion of final assessment, assembly of documentation and completion of required
certification, the manufacturer shall issue a declaration of compliance with this European Standard (see CEN/TR
13480-7).
NOTE
30
See CEN/TR 13480-7 for guidance on the requirements for EC declaration of conformity.
EN 13480-5:2002 (E)
Issue 1 (2002-05)
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Annex A
(informative)
Inspection of safety systems
This annex contains recommendations for the inspection of the safety systems before the industrial piping is going
into operation and during service.
Safety valves (direct loaded, pilot-operated or a combination thereof) and the main valve of a CSPRS should be
examined for:
free movement of all moving parts;
the set pressure;
the size of the full lift as specified;
the external and internal tightness;
all other parameters indicated in the manufacturer's technical documentation.
This examination should be repeated after every discharge of the direct loaded safety valves.
For safety devices containing bursting discs, the replacement period of the bursting discs should be established. To
this purpose, the coincident temperature and pressure cycles during operation and other foreseeable conditions
should be assessed.
After an in-service period, the bursting disc should be re-examined and tested in order to adjust the replacement
period where necessary.
All other safety systems and their function should be regularly inspected to ensure that the properties specified are
still available.
Record should be kept on both the procedures and results.
31
EN 13480-5:2002 (E)
Issue 1 (2002-05)
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Annex ZA
(informative)
Clauses of this European Standard addressing essential requirements or
other provisions of EU directives
This European standard has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association and supports essential safety requirements of the Pressure Equipment Directive
97/23/EC with regard to inspection and testing requirements for metallic industrial piping.
WARNING Other requirements and other EU Directives may be applicable to the product(s) falling within the scope
of this standard.
The following clauses of this standard given in Table ZA.1 are likely to support the essential safety requirements of
the Pressure Equipment Directive 97/23/EC.
Table ZA.1 — Comparison between EN 13480-5 and the Pressure Equipment Directive 97/23/EC with
respect to inspection and testing requirements for metallic industrial piping
EN 13480-5
harmonised clauses
Content
Directive 97/23/EC,
Annex I
5.1 to 5.3
inspection and testing requirements
1.1
6
manufacturing procedures
3.1
7
Permanent joining
3.1.2
8.1
preparation of component parts
3.1.1
8.4
Personnel for non-destructive tests
3.1.3
8.2 and 8.4
non-destructive testing
9.2
final inspection
3.2.1
9.3
proof test
3.2.2
9.5.3 and
Table 9.5-1
operating instruction
9.5.1 and
9.5.2
documentation
7.2
3.4
3.1.1
Compliance with these clauses of this standard provides one means of conforming with the specific essential safety
requirements of the Directive concerned and associated EFTA regulations.
32
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BS EN
13480-5:2002
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