SIST EN ISO 11960:2021

SLOVENSKI STANDARD
01-junij-2021
Nadomešča:
SIST EN ISO 11960:2014
Industrija nafte in zemeljskega plina - Jeklene cevi, ki se uporabljajo kot zaščitne
cevi ali cevovodi za vrtine (ISO 11960:2020)
Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells
(ISO 11960:2020)
Erdöl- und Erdgasindustrie - Stahlrohre zur Verwendung als Futter - oder Steigrohre für
Bohrungen (ISO 11960:2020)
Industries du pétrole et du gaz naturel - Tubes d'acier utilisés comme cuvelage ou tubes
de production dans les puits (ISO 11960:2020)
Ta slovenski standard je istoveten z: EN ISO 11960:2021
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction 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 11960
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 75.180.10; 77.140.75 Supersedes EN ISO 11960:2014
English Version
Petroleum and natural gas industries - Steel pipes for use
as casing or tubing for wells (ISO 11960:2020)
Industries du pétrole et du gaz naturel - Tubes d'acier Erdöl- und Erdgasindustrie - Stahlrohre zur
utilisés comme cuvelage ou tubes de production dans Verwendung als Futter - oder Steigrohre für
les puits (ISO 11960:2020) Bohrungen (ISO 11960:2020)
This European Standard was approved by CEN on 16 April 2021.

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 CEN-CENELEC 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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11960:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11960:2021) 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 CEN/TC 12 “Materials, equipment and offshore structures for
petroleum, petrochemical and natural gas industries” the secretariat of which is held by NEN.
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 October 2021, and conflicting national standards shall
be withdrawn at the latest by October 2021.
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.
This document supersedes EN ISO 11960:2014.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 11960:2020 has been approved by CEN as EN ISO 11960:2021 without any modification.

INTERNATIONAL ISO
STANDARD 11960
Sixth edition
2020-03
Petroleum and natural gas
industries — Steel pipes for use as
casing or tubing for wells
Industries du pétrole et du gaz naturel — Tubes d'acier utilisés
comme cuvelage ou tubes de production dans les puits
Reference number
ISO 11960:2020(E)
©
ISO 2020
ISO 11960:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 11960:2020(E)
Contents Page
Foreword .x
Introduction .xi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 3
3.1 Terms and definitions . 3
3.2 Symbols and abbreviated terms. 7
4 Conformance . 8
4.1 Dual referencing of normative references . 8
4.2 Units of measurement . . 9
5 Information to be supplied by the purchaser. 9
5.1 Grades C90, T95 and C110 . 9
5.2 Casing . 9
5.3 Tubing .11
5.4 Coupling stock, coupling material and accessory material .13
6 Process of manufacture .14
6.1 General .14
6.2 Heat treatment .14
6.2.1 General.14
6.2.2 Grades J55, K55, N80 all types and R95 .15
6.2.3 Grades L80 all types, C90, T95 and C110 .15
6.3 Straightening .15
6.3.1 Grades H40, J55, K55, N80 all types .15
6.3.2 Grades R95 and P110 .15
6.3.3 Grade L80 .15
6.3.4 Grades C90, T95 and C110 .16
6.3.5 Grade Q125 .16
6.4 Traceability .16
6.4.1 General.16
6.4.2 Serialization of Grades C90, T95, C110 and Q125 .16
6.5 Processes requiring validation .16
7 Material requirements .17
7.1 Chemical composition .17
7.2 Tensile properties .17
7.2.1 General.17
7.2.2 Elongation .17
7.2.3 Yield strength . . .17
7.2.4 Statistical tensile testing — Grades C90, T95 and C110 .18
7.3 Charpy V-notch test — General requirements .18
7.3.1 Evaluation of test results .18
7.3.2 Critical thickness.18
7.3.3 Specimen size and orientation .18
7.3.4 Hierarchy of test specimens .18
7.3.5 Alternative size impact test specimens .19
7.3.6 Sub-size test specimens .19
7.3.7 Test temperature .19
7.3.8 Statistical impact testing .19
7.3.9 Reference information .19
7.4 Charpy V-notch — Absorbed energy requirements for coupling stock, coupling
material, coupling blanks and couplings .19
7.4.1 General.19
7.4.2 Grade H40 .19
ISO 11960:2020(E)
7.4.3 Grades J55 and K55 for API threads . .19
7.4.4 Grades N80 all Types, R95, L80 all Types, C90, T95, P110 and Q125 for
API threads .20
7.4.5 Special end-finish .20
7.5 Charpy V-notch — Absorbed energy requirements for pipe . .20
7.5.1 Grades H40, J55 and K55 .20
7.5.2 Grades N80 all Types, R95, L80, C90, T95 and P110 .20
7.5.3 Grades C110 and Q125 .21
7.5.4 Test specimen .21
7.5.5 Testing conditions .22
7.6 Charpy V-notch — Absorbed energy requirements for accessory material .22
7.6.1 Accessory material — General .22
7.6.2 Accessory material for accessories with internal API threads except
integral tubing connections .22
7.6.3 Accessory material for accessories with internal special end-finish
tapered interference-type threads .22
7.6.4 Accessory material for accessories with external threads .22
7.6.5 Accessory material for accessories with either integral tubing connections
or internal special end-finish connections that do not have thread interference 22
7.6.6 Critical thickness for accessory material and special end-finish material .22
7.7 Maximum hardness .23
7.7.1 Grades L80 all types, C90, T95 and C110 .23
7.7.2 Grade Q125 — All products .23
7.8 Hardness variation — Grades C90, T95, C110 and Q125 .23
7.9 Process control — Grades C90, T95, C110 and Q125 . .23
7.10 Hardenability — Minimum percentage martensite for quenched and tempered
products .24
7.10.1 Grade L80 Type 1 .24
7.10.2 Grades C90 and T95 .24
7.10.3 Grade C110.24
7.10.4 All grades except Grades L80, C90, T95 and C110 .24
7.11 Grain size — Grades C90, T95 and C110 .25
7.12 Surface condition — Grade L80 13Cr .25
7.13 Flattening — Electric-welded pipe .25
7.14 Sulfide stress cracking test — Grades C90, T95 and C110 .25
7.14.1 General guidance .25
7.14.2 Test and retest requirements and recommendations .25
7.14.3 Test sample selection and location .26
7.14.4 Test solution.26
7.14.5 Minimum SSC requirements .27
7.14.6 Invalidation of tests .28
7.14.7 Additional testing provisions for ANSI/NACE TM0177-2016 Method D .28
8 Dimensions, masses, tolerances, product ends and defects.28
8.1 Labels and sizes .28
8.2 Dimensions and masses .28
8.3 Diameter .29
8.3.1 Measurement and design .29
8.3.2 Requirements .29
8.4 Wall thickness .29
8.5 Mass .29
8.6 Length .30
8.7 Casing jointers .30
8.8 Height and trim of electric-weld flash .30
8.8.1 Trimming electric-weld flash .30
8.8.2 Grades H40, J55, K55, N80 all types, R95, and L80 Type 1 .30
8.8.3 Grades P110 and Q125 .31
8.8.4 Disposition .31
8.9 Straightness .31
iv © ISO 2020 – All rights reserved

ISO 11960:2020(E)
8.9.1 Pipe .31
8.9.2 Coupling stock, coupling material and accessory material .31
8.10 Drift requirements .31
8.11 Tolerances on dimensions and masses .32
8.11.1 Outside diameter .32
8.11.2 Wall thickness .32
8.11.3 Mass .32
8.11.4 Inside diameter .33
8.11.5 Upset dimensions .33
8.11.6 Extended length upsets .33
8.12 Product ends .33
8.12.1 Plain-end pipe .33
8.12.2 Product with API threads .33
8.12.3 Rounded nose .33
8.12.4 Threading .33
8.12.5 Special end finish .34
8.13 Defects .34
8.13.1 Pipe and accessory made from pipe .34
8.13.2 Accessory material not made from pipe, coupling stock and coupling material.34
8.13.3 Process control plan.35
8.14 Coupling make-up and thread protection.35
8.14.1 All Grades except Q125 .35
8.14.2 Grade Q125 .35
9 Couplings .35
9.1 General requirements .35
9.2 Alternative grades or heat treatments .36
9.3 Mechanical properties .36
9.4 Dimensions and tolerances .36
9.4.1 All Grades except Q125 .36
9.4.2 Grade Q125 .37
9.5 Regular couplings .37
9.6 Special-clearance couplings — All Grades except Q125 .37
9.7 Combination couplings .37
9.8 Seal-ring couplings .37
9.9 Special-bevel tubing regular couplings — All Grades .37
9.10 Threading — Couplings .38
9.11 Surface inspection .38
9.12 Measurement of imperfections .38
9.13 Repair and removal of imperfections and defects .39
9.14 Thread surface treatment — Grade Q125 .39
9.15 Couplings and coupling blank protection — Grades C90, T95, C110 and Q125 .39
10 Inspection and testing .39
10.1 Test equipment .39
10.2 Lot definition for testing of mechanical properties .39
10.2.1 Grades H40, J55, K55, N80 all types, L80 Type 1, R95 and P110 —
Coupling stock, coupling material and pipe (except pup joints heat-
treated after cutting to blank or individual length) .39
10.2.2 Grades L80 13Cr, C90, T95, C110 and Q125 — Coupling stock, coupling
material and pipe (except pup joints heat-treated after cutting to blank or
individual length) .39
10.2.3 Coupling blanks, pup joints or accessory material heat-treated after
cutting to blank or individual length .40
10.3 Testing of chemical composition .40
10.3.1 Heat analyses .40
10.3.2 Product analyses .40
10.3.3 Test method .40
10.3.4 Recheck of product analyses — All Grades .41
ISO 11960:2020(E)
10.4 Tensile tests .41
10.4.1 Stress-relief temperature — All grades .41
10.4.2 Heat-control tensile tests — All Grades except Q125 .41
10.4.3 Frequency of testing and location of test specimen — Casing and tubing .41
10.4.4 Frequency of testing and test specimen location — Coupling stock,
coupling material, coupling blanks, pup joints and accessory material .41
10.4.5 Test specimens — General .42
10.4.6 Test specimens — Additional requirements for coupling blanks, coupling
stock coupling material and pup joint and accessory materials — Grades
C110 and Q125 .42
10.4.7 Test method .42
10.4.8 Invalidation of tests .43
10.4.9 Retests — All products (except coupling blanks, coupling stock, coupling
material, pup joints or accessory material) — Grades C90, T95, C110 and
Q125 .43
10.4.10 Retests — Coupling blanks, coupling stock, coupling material, pup joints
or accessory material in Grades C90, T95, C110 and Q125 .43
10.5 Flattening test .43
10.5.1 General requirement for testing .43
10.5.2 Frequency of testing .43
10.5.3 Test specimens.44
10.5.4 Test method for Grades H40, J55, K55, N80 all types, R95, and L80 Type 1 .44
10.5.5 Test method for Grade P110 pipe and Grade Q125 casing .44
10.5.6 Invalidation of tests .44
10.5.7 Retests .44
10.6 Hardness test .44
10.6.1 Frequency of testing — General .44
10.6.2 Frequency of testing — Heat-control tests — Grade L80.45
10.6.3 Frequency of testing — Grade L80 .45
10.6.4 Frequency of testing and test specimen location — Non-upset pipe —
Grades C90, T95 and C110 .45
10.6.5 Frequency of testing and test specimen location — Upset pipe —
Grades C90 and T95 .45
10.6.6 Frequency of testing and test specimen location — Coupling blanks,
coupling stock, coupling material, pup joints and accessory material —
Grades C90, T95 and C110 .45
10.6.7 Frequency of testing — Grade Q125 .46
10.6.8 Test specimens.46
10.6.9 Test method .46
10.6.10 Invalidation of tests .48
10.6.11 Periodic checks of hardness-testing machines .48
10.6.12 Verification of hardness-testing machines and indenters.48
10.6.13 Retests — Grade L80 .49
10.6.14 Retests — Grades C90, T95 and C110 products except for coupling blanks,
pup joints or accessory material heat-treated after cutting to individual
lengths.49
10.6.15 Retests — Grades C90, T95 and C110 coupling blanks, pup joints or
accessory material heat-treated after cutting to individual lengths .50
10.6.16 Retests — Grade Q125 — General .50
10.6.17 Retests — Grade Q125 — Casing, coupling stock and coupling material .50
10.6.18 Retests — Grade Q125 — Coupling blanks, pup joints and accessory material .50
10.6.19 Rejected lots — Grades L80 all types, C90, T95, C110 and Q125 .50
10.7 Impact test .50
10.7.1 Sampling —Grades J55 and K55 .50
10.7.2 Sampling — Grades N80 all types, R95, L80, C90, T95, C110 and P110 .50
10.7.3 Sampling and test specimen location — Grade Q125 .51
10.7.4 Test specimens.51
10.7.5 Test method .51
vi © ISO 2020 – All rights reserved

ISO 11960:2020(E)
10.7.6 Invalidation of tests .51
10.7.7 Retest of a length — All Grades .51
10.7.8 Replacement of a reject length — All Grades .52
10.7.9 Multiple length rejection — Grade Q125 .52
10.8 Grain size determination — Grades C90, T95 and C110 .52
10.8.1 Sampling.52
10.8.2 Test method .52
10.9 Hardenability — Grades C90, T95 and C110 .52
10.10 Sulfide stress-cracking test — Grades C90, T95 and C110 .52
10.11 Metallographic evaluation — All EW Grades .52
10.12 Hydrostatic tests .53
10.12
...