EN ISO 3183:2012/A1:2018

SLOVENSKI STANDARD
01-maj-2018
Industrija nafte in zemeljskega plina - Jeklene cevi za cevovodni transportni
sistem - Dopolnilo A1 (ISO 3183:2012/Amd 1:2017)
Petroleum and natural gas industries - Steel pipe for pipeline transportation systems
(ISO 3183:2012/Amd 1:2017)
Erdöl- und Erdgasindustrie - Stahlrohre für Rohrleitungstransportsysteme (ISO
3183:2012/Amd 1:2017)
Industries du pétrole et du gaz naturel - Tubes en acier pour les systèmes de transport
par conduites (ISO 3183:2012/Amd 1:2017)
Ta slovenski standard je istoveten z: EN ISO 3183:2012/A1:2018
ICS:
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3183:2012/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2018
EUROPÄISCHE NORM
ICS 23.040.10
English Version
Petroleum and natural gas industries - Steel pipe for
pipeline transportation systems - Amendment 1 (ISO
3183:2012/Amd 1:2017)
Industries du pétrole et du gaz naturel - Tubes en acier Erdöl- und Erdgasindustrie - Stahlrohre für
pour les systèmes de transport par conduites - Rohrleitungstransportsysteme (ISO 3183:2012/Amd
Amendement 1 (ISO 3183:2012/Amd 1:2017) 1:2017)
This amendment A1 modifies the European Standard EN ISO 3183:2012; it was approved by CEN on 28 November 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment 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 CEN-CENELEC Management Centre has the
same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3183:2012/A1:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3183:2012/A1:2018) has been prepared by Technical Committee ISO/TC 67
“Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries”
in collaboration with Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” the
secretariat of which is held by UNI.
This Amendment to the European Standard EN ISO 3183:2012 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by September 2018,
and conflicting national standards shall be withdrawn at the latest by September 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 3183:2012/Amd 1:2017 has been approved by CEN as EN ISO 3183:2012/A1:2018
without any modification.
INTERNATIONAL ISO
STANDARD 3183
Third edition
2012-11-01
AMENDMENT 1
2017-11
Petroleum and natural gas
industries — Steel pipe for pipeline
transportation systems
AMENDMENT 1
Industries du pétrole et du gaz naturel — Tubes en acier pour les
systèmes de transport par conduites
AMENDEMENT 1
Reference number
ISO 3183:2012/Amd.1:2017(E)
©
ISO 2017
ISO 3183:2012/Amd.1:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

ISO 3183:2012/Amd.1:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline
transportation systems.
ISO 3183:2012/Amd.1:2017(E)
Petroleum and natural gas industries — Steel pipe for
pipeline transportation systems
AMENDMENT 1
Annex M
Replace the whole Annex M with the following:
Annex M
(normative)
PSL 2 pipe ordered for European onshore natural gas transmission pipelines
M.1  General
This annex specifies additional provisions that apply for PSL 2 pipe for European onshore natural gas
transmission pipelines.
M.2  Additional information to be supplied by the purchaser
In addition to items a) to g) as specified by 7.1 and to items a) to c) as specified by 7.2, the purchase
order shall indicate which of the following provisions apply for the specific order item:
a) items that are subject to mandatory agreement, if applicable:
1) chemical composition for pipe with t > 25,0 mm (0.984 in) (see M.4.1.2);
2) carbon equivalent limit for Grades L415NE (X60NE) and L555QE (X80QE) (see Table M.1);
3) tensile properties for pipe with t > 25,0 mm (0.984 in) (see M.4.2.1);
4) minimum average absorbed energy (see M.4.4.1);
5) diameter and out-of-roundness tolerances for the ends of SMLS pipe with t > 25,0 mm (0.984 in)
(see Table M.3, footnote b);
6) diameter and out-of-roundness tolerances for pipe with D > 1 422 mm (56.000 in) (see
Table M.3);
7) type of inspection certificate (see M.7.1.1);
8) party issuing the inspection certificate (see M.7.1.1);
b) items that apply as prescribed, unless otherwise agreed:
1) steel casting method for coil or plate used for the manufacture of welded pipe (see M.3.3.2.1);
2) application of diameter tolerance to the outside diameter for pipe with D ≥ 610 mm (24.000 in)
(see Table M.3, footnote d);
3) timing of NDT of HFW weld seam with outside diameter D < 219,1 mm (8.625 in) (see M.7.5.3);
4) timing of NDT of full body seamless pipe (see M.7.5.3);
c) items that apply, if agreed:
1) approval of the quality system (see M.3.1);
ISO 3183:2012/Amd.1:2017(E)
2) manufacturing procedure qualification (see M.3.1 and Annex B);
3) another steelmaking process (see M.3.2);
4) supply of helical seam pipe containing coil/plate end welds (see M.3.3.2.3);
5) chemical composition limits (see Table M.1, footnotes a, f and j);
6) temperature for the CVN impact test for the pipe body (see M.4.4.1);
7) temperature for the CVN impact test for the pipe weld and heat affected zone (see M.4.4.2);
8) use of inside diameter to determine diameter and out-of-roundness tolerances for pipe with
D ≥ 219,1 mm (8.625 in) (see Table M.3, footnote c);
9) pipe body DWT testing frequency (see M.7.2 and Table M.7);
10) hardness testing frequency (see M.7.2 and Table M.7);
11) orientation of tensile test piece (see Table M.8, footnote c);
12) ultrasonic inspection for laminar imperfections of pipe body and ends (see Table M.10, numbers
2, 5, 6, 8, 9);
13) flux leakage testing for longitudinal imperfections in seamless pipe (see Table M.10);
14) flux leakage or eddy current testing for longitudinal imperfections in HFW pipe (see
Table M.10);
15) alternate acceptance level for ultrasonic (U2) or flux leakage (F2) testing of longitudinal
imperfections (see Table M.10);
16) use of fixed-depth notches for equipment standardization [see K.5.1.1 c)];
17) radiographic inspection of the pipe ends (non-inspected pipe ends) and repaired areas on
longitudinal imperfections [see Table M.10 and K.5.3 a)];
18) use of hole penetrameter instead of ISO wire penetrameter (see M.7.5.6.2);
19) use of digital radiographic inspection (see M.7.5.6.3).
M.3  Manufacturing
M.3.1  Manufacturing procedure
The pipe manufacturer and the stockist, where products are supplied through a stockist, shall operate
a quality system. If agreed, the quality system shall be approved by the purchaser.
NOTE The term “stockist” is equivalent to, and interchangeable with, the term “distributor”.
If agreed, the manufacturing procedure shall be qualified in accordance with Annex B.
M.3.2  Steel making
The steel shall be made to a clean steel practice, using either the basic oxygen steel-making process or
the electric-arc furnace steel-making process, and shall be fully killed and be made according to fine
grain practice.
Other steelmaking processes may be used by agreement.
2 © ISO 2017 – All rights reserved

ISO 3183:2012/Amd.1:2017(E)
M.3.3  Pipe manufacturing
M.3.3.1  SMLS pipe
SMLS pipe shall be manufactured from continuously (strand) cast or ingot steel. If the process of cold
finishing followed by normalizing (N) or quench and tempering (Q) is used, this shall be stated in the
inspection document. The as-rolled (R) pipe forming processes (see Table 3) shall not be used.
M.3.3.2  Welded pipe
M.3.3.2.1  Unless otherwise agreed, coil and plate used for the manufacture of welded pipe shall be
rolled from continuously (strand) cast or pressure cast slabs. The pipe shall be SAWH, SAWL, COWH,
COWL, or HFW in the N or M delivery conditions (see Table 3) only.
For HFW pipe from hot-rolled coil, the pipe forming process “cold forming followed by thermomechanical
forming” (see Table 3) shall not be used.
M.3.3.2.2  For HFW pipe, the abutting edges of the coil or plate shall be sheared, milled or machined
before welding such that the edges are clean and free of damage.
M.3.3.2.3  If agreed, for helical seam pipe made from coil or plate, pipe containing coil/plate end welds
may be delivered, provided that such welds are located at least 300 mm (11.8 in) from the pipe end
and such welds have been subjected to the same non-destructive testing that is required in M.7.5 for
coil/plate edges and welds.
M.4  Acceptance criteria
M.4.1  Chemical composition
M.4.1.1  For pipe with t ≤ 25,0 mm (0.984 in), the chemical composition for standard grades shall be as
given in Table M.1. Intermediate grades are not allowed. The steel name shall be as given in Table M.1
and consists of an alphanumeric designation that identifies the strength level, followed by a suffix
that consists of a letter (N, Q, or M) that identifies the delivery condition and a second letter (E) that
identifies the pipe as manufactured to the requirements of this annex.
M.4.1.2  For pipe with t > 25,0 mm (0.984 in) up to 40 mm (1.575 in), the chemical composition shall be
as agreed, with the requirements given in Table M.1 being amended as appropriate.
ISO 3183:2012/Amd.1:2017(E)
Table M.1 — Chemical composition for pipe with t ≤ 25,0 mm (0.984 in)
Carbon Carbon
equiva- equiva-
a
Steel grade Mass fraction, based upon heat and product analyses
c c
lent lent
(Steel name) % maximum
% maxi- % maxi-
mum mum
b b
C Si Mn P S V Nb Ti Other CE CE
IIW Pcm
Seamless and welded pipe
d
L245NE or BNE 0,18 0,40 1,20 0,025 0,015 — — — 0,42 0,25
d
L290NE or X42NE 0,19 0,40 1,20 0,025 0,015 0,06 0,05 0,04 0,42 0,25
d,e
L360NE or X52NE 0,22 0,45 1,40 0,025 0,015 0,10 0,05 0,04 0,43 0,25
j j j j j d,e,f
L415NE or X60NE 0,23 0,45 1,40 0,025 0,015 0,10 0,05 0,04 As agreed As agreed
Seamless pipe
d
L360QE or X52QE 0,18 0,45 1,50 0,025 0,015 0,05 0,05 0,04 0,42 0,25
d,e,f
L415QE or X60QE 0,18 0,45 1,70 0,025 0,015 0,09 0,06 0,05 0,43 0,25
d,e,f
L450QE or X65QE 0,18 0,45 1,70 0,025 0,015 0,10 0,06 0,07 0,43 0,25
d,e,f
L485QE or X70QE 0,18 0,45 1,80 0,025 0,015 0,11 0,06 0,07 0,43 0,25
e,g
L555QE or X80QE 0,18 0,45 1,90 0,025 0,015 0,11 0,07 0,07 As agreed As agreed
Welded pipe
d
L245ME or BME 0,18 0,45 1,20 0,025 0,015 0,05 0,05 — 0,40 0,25
d
L290ME or X42ME 0,18 0,45 1,30 0,025 0,015 0,05 0,05 — 0,40 0,25
d
L360ME or X52ME 0,18 0,45 1,40 0,025 0,015 0,06 0,06 0,05 0,41 0,25
j i e,h
L415ME or X60ME 0,12 0,45 1,60 0,025 0,015 0,09 0,08 0,07 0,42 0,25
j i e,h
L450ME or X65ME 0,12 0,45 1,60 0,025 0,015 0,09 0,08 0,07 0,43 0,25
j i e,h
L485ME or X70ME 0,12 0,45 1,70 0,025 0,015 0,11 0,08 0,07 0,43 0,25
j i e,h j j
L555ME or X80ME 0,12 0,45 1,80 0,025 0,015 0,11 0,08 0,07 0,43 0,25
a
Elements not mentioned in this table shall not be added intentionally without the purchaser's approval except for
elements that may be added for deoxidation and finishing of the heat.
b
For each reduction of 0,01 % below the specified maximum for C, an increase of 0,05 % above the specified maximum
for Mn is permissible, up to a maximum increase of 0,20 %.
c
Based upon product analysis (see 9.2.4 and 9.2.5). The CE limits apply if C > 0,12 % and the CE limits apply if
IIW Pcm
C ≤ 0,12 %.
d
0,015 % ≤ Al ≤ 0,060 %; N ≤ 0,012 %; Al/N ≥ 2:1, Cu ≤ 0,25 %; Ni ≤ 0,30 %; Cr ≤ 0,30 %; Mo ≤ 0,10 %.
total
e
V + Nb + Ti ≤ 0,15 %.
f
If agreed, Mo ≤ 0,35 %.
g
0,015 % ≤ Al ≤ 0,060 %; N ≤ 0,012 %; Al/N ≥ 2:1, Cu ≤ 0,25 %; Ni ≤ 0,60 %; Cr ≤ 0,50 %; Mo ≤ 0,50 %.
total
h
0,015 % ≤ Al ≤ 0,060 %; N ≤ 0,012 %; Al/N ≥ 2:1, Cu ≤ 0,50 %; Ni ≤ 0,50 %; Cr ≤ 0,30 %; Mo ≤ 0,35 %.
total
i
Use of higher Nb levels shall meet the following formula: Nb + C ≤ 0,20 %.
j
Unless otherwise agreed.
M.4.2  Tensile properties
M.4.2.1  The tensile properties shall be as given in Table M.2. For pipe with t > 25,0 mm (0.984 in) up
to 40 mm (1.575 in), the tensile properties shall be as agreed, with the requirements given in Table M.2
being amended as appropriate.
4 © ISO 2017 – All rights reserved

ISO 3183:2012/Amd.1:2017(E)
Table M.2 — Requirements for the results of tensile test t ≤ 25,0 mm (0.984 in)
Weld seam
of HFW,
Pipe body of SMLS and welded pipes
SAW and
COW pipes
a
Steel grade Yield strength Tensile strength Ratio Elongation Tensile
R R R /R A strength
t0,5 m t0,5 m f
MPa (psi) MPa (psi) % R
m
MPa (psi)
Minimum Maximum Minimum Maximum Maximum Minimum Minimum
245 440 415 655 415
L245NE or BNE 0,80 22
(35 500) (63 800) (60 200) (95 000) (60 200)
245 440 415 655 415
L245ME or BME 0,85 22
(35 500) (63 800) (60 200) (95 000) (60 200)
L290NE or X42NE 290 440 415 655 415
0,85 21
L290ME or X42ME (42 100) (63 800) (60 200) (95 000) (60 200)
L360NE or X52NE 360 510 460 760 460
0,85 20
L360ME or X52ME (52 200) (74 000) (66 700) (110 200) (66 700)
360 510 460 760 460
L360QE or X52QE 0,88 20
(52 200) (74 000) (66 700) (110 200) (66 700)
L415NE or X60NE 415 565 520 760 520
0,85 18
L415ME or X60ME (60 200) (81 900) (75 400) (110 200) (75 400)
415 565 520 760 520
L415QE or X60QE 0,88 18
(60 200) (81 900) (75 400) (110 200) (75 400)
450 570 535 760 535
L450QE or X65QE 0,90 18
(65 300) (82 700) (77 600) (110 200) (77 600)
450 570 535 760 535
L450ME or X65ME 0,87 18
(65 300) (82 700) (77 600) (110 200) (77 600)
L485QE or X70QE 485 605 570 760 570
0,90 18
L485ME or X70ME (70 300) (92 100) (82 700) (110 200) (82 700)
L555QE or X80QE 555 675 625 825 625
0,90 18
L555ME or X80ME (79 800) (97 900) (90 600) (110 200) (90 600)
a
These values apply to transverse test pieces taken from the pipe body. When longitudinal test pieces are tested (see
Table 20), the values of elongation shall be 2 units higher.
M.4.3  Hydrostatic test
Each length of pipe shall withstand the test without showing leakage or visible deformation.
M.4.4  CVN impact test
M.4.4.1  Pipe body
The minimum average (set of three test pieces) absorbed energy for the pipe body shall be in accordance
with Table G.1 or Table G.2 as specified by the purchaser. Single values of the absorbed energy shall be
at minimum 75 % of the minimum specified mean value. The test temperature shall be 0 °C (32 °F), or if
agreed, a lower test temperature.
If no transverse test pieces can be obtained (see M.7.3.3), longitudinal test pieces shall be tested. The
required absorbed energy for longitudinal test pieces shall be 50 % higher than the specified energy for
transverse test pieces.
M.4.4.2  Pipe weld and heat affected zone
The minimum average (set of three test pieces) absorbed energy for pipe weld and heat affected
zone, based upon full-size test pieces and a test temperature of 0 °C (32 °F), or if agreed, a lower test
temperature, shall be 40 J (30 ft·lbf).
ISO 3183:2012/Amd.1:2017(E)
M.5   Tolerances for diameter, wall thickness, length, and straightness
M.5.1   Except as allowed by C.2.3, the diameter and out-of-roundness shall be within the tolerances
given in Tables 10 and M.3.
Table M.3 — Tolerances for diameter and out-of-roundness
a
Diameter tolerances Out-of-roundness
Specified
a,e
mm (in) tolerances
outside
mm (in)
diameter
b,c
D Pipe except the end Pipe end Pipe except Pipe end
mm (in) the end
b
SMLS pipe Welded pipe SMLS pipe Welded pipe
<60,3 (2.375) ±0,5 (0.020) Included in diameter tolerance
±0,5 (0.020) or ± 0,007 5 D,
c
±0,5 (0.020) or ± 0,005 D
or ± 0,007 5 D, whichever is
(whichever is greater), but
≥60,3 (2.375) to
whichever is greater, but
0,02 D 0,015 D
maximum of ± 1,6 (0.063)
610 (24.000)
greater maximum
of ± 3,0 (0.125)
d d
>610 (24.000) to ±0,01 D ±0,005 D, but ±2,0 (0.079) ±1,6 (0.063) 0,015 D, 0,01 D,
1 422 (56.000) maximum but maximum but maximum
of ± 4,0 (0.160) of 15 (0.6), for of 13 (0.5), for
D D
≤75 ≤75
t t
0,02 D for 0,015 D for
D D
>75 >75
t t
d d
>1 422 (56.000) As agreed As agreed As agreed
a
The pipe end includes a length of 100 mm (4.0 in) at each of the pipe extremities.
b
For SMLS pipe, the tolerances apply for t ≤ 25,0 mm (0.984 in) and the tolerances for heavier wall pipe shall be as agreed.
c
Subject to agreement, the diameter tolerance may be applied to the inside diameter for D ≥ 219,1 mm (8.625 in).
d
Unless otherwise agreed, the diameter tolerance applies to the inside diameter.
e
When the diameter tolerance is applied to the inside diameter, the inside diameter shall also be the basis for the out-of-
roundness requirements.
M.5.2   The wall thickness shall be within the tolerances given in Table M.4.
Table M.4 — Tolerances for wall thickness
Wall thickness
a
Tolerances
t
mm (in)
mm (in)
b
SMLS pipe
+0,6 (0.024)
≤4,0 (0.157)
−0,5 (0.020)
+0,150 t
>4,0 (0.157) to <25,0 (0.984)
–0,125 t
a
If the purchase order specifies a minus tolerance for wall thickness smaller than the applicable value given in this table,
the plus tolerance for wall thickness shall be increased by an amount sufficient to maintain the applicable tolerance range.
b
For pipe with D ≥ 355,6 mm (14 000 in) and t ≥ 25,0 mm (0.984 in), the wall thickness tolerance locally may exceed the
plus tolerance for wall thickness by an additional 0,05 t, provided that the plus tolerance for mass (see 9.14) is not exceeded.
c
The plus tolerance for wall thickness does not apply to the weld area.
d
See 9.13.2 for additional restrictions.
6 © ISO 2017 – All rights reserved

ISO 3183:2012/Amd.1:2017(E)
Table M.4 (continued)
Wall thickness
a
Tolerances
t
mm (in)
mm (in)
+3,7 (0.146) or +0,1 t, whichever is greater
≥25,0 (0.984)
−3,0 (0.120) or –0,1 t, whichever is greater
c,d
Welded pipe
≤10,0 (0.394) ±0,5 (0.020)
+0,1 t
>10,0 (0.394) to <15,0 (0.591)
–0,05 t
+1,5 (0.060)
≥15,0 (0.591) to <20,0 (0.787)
–0,05 t
+1,5 (0.060)
≥20,0 (0.787)
−1,0 (0.039)
a
If the purchase order specifies a minus tolerance for wall thickness smaller than the applicable value given in this table,
the plus tolerance for wall thickness shall be increased by an amount sufficient to maintain the applicable tolerance range.
b
For pipe with D ≥ 355,6 mm (14 000 in) and t ≥ 25,0 mm (0.984 in), the wall thickness tolerance locally may exceed the
plus tolerance for wall thickne
...