Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells (ISO 11960:2020)

This document specifies the technical delivery conditions for steel pipes (casing, tubing and pup joints),
coupling stock, coupling material and accessory material.
By agreement between the purchaser and manufacturer, this document can also be applied to other
plain-end pipe sizes and wall thicknesses.
This document is applicable to the following connections:
— short round thread casing (SC);
— long round thread casing (LC);
— buttress thread casing (BC);
— non-upset tubing (NU);
— external upset tubing (EU);
— integral-joint tubing (IJ).
NOTE 1 For further information, see API Spec 5B.
For such connections, this document specifies the technical delivery conditions for couplings and
thread protection.
NOTE 2 Supplementary requirements that can optionally be agreed for enhanced leak resistance connections
(LC) are given in A.9 SR22.
This document can also be applied to tubulars with connections not covered by ISO or API standards.
This document is applicable to products including the following grades of pipe: H40, J55, K55, N80, L80,
C90, R95, T95, P110, C110 and Q125.
This document is not applicable to threading requirements.
NOTE 3 Dimensional requirements on threads and thread gauges, stipulations on gauging practice, gauge
specifications, as well as, instruments and methods for inspection of threads are given in API Spec 5B.

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)

Industrija nafte in zemeljskega plina - Jeklene cevi, ki se uporabljajo kot zaščitne cevi ali cevovodi za vrtine (ISO 11960:2020)

General Information

Status
Published
Public Enquiry End Date
30-Sep-2018
Publication Date
04-May-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
03-May-2021
Due Date
08-Jul-2021
Completion Date
05-May-2021

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SLOVENSKI STANDARD
SIST EN ISO 11960:2021
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
SIST EN ISO 11960:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 11960:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 11960:2021
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.
---------------------- Page: 3 ----------------------
SIST EN ISO 11960:2021
EN ISO 11960:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 11960:2021
EN ISO 11960:2021 (E)
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.

---------------------- Page: 5 ----------------------
SIST EN ISO 11960:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 11960:2021
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
---------------------- Page: 7 ----------------------
SIST EN ISO 11960:2021
ISO 11960:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
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
---------------------- Page: 8 ----------------------
SIST EN ISO 11960:2021
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 2020 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 11960:2021
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
---------------------- Page: 10 ----------------------
SIST EN ISO 11960:2021
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 ...........................................................................

...

SLOVENSKI STANDARD
oSIST prEN ISO 11960:2018
01-september-2018

,QGXVWULMDQDIWHLQ]HPHOMVNHJDSOLQD-HNOHQHFHYLNLVHXSRUDEOMDMRNRW]DãþLWQH

FHYLDOLFHYRYRGL]DYUWLQH ,62',6

Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells

(ISO/DIS 11960:2018)

Erdöl- und Erdgasindustrie - Stahlrohre zur Verwendung als Futter - oder Steigrohre für

Bohrungen (ISO/DIS 11960:2018)

Industries du pétrole et du gaz naturel - Tubes d'acier utilisés comme cuvelage ou tubes

de production dans les puits (ISO/DIS 11960:2018)
Ta slovenski standard je istoveten z: prEN ISO 11960
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
oSIST prEN ISO 11960:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 11960:2018
---------------------- Page: 2 ----------------------
oSIST prEN ISO 11960:2018
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11960
ISO/TC 67/SC 5 Secretariat: JISC
Voting begins Voting terminates on:
on: 2018-07-26 2018-10-18
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
ICS: 75.180.10; 77.140.75
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 11960:2018(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2018
---------------------- Page: 3 ----------------------
oSIST prEN ISO 11960:2018
ISO/DIS 11960:2018(E) ISO/DIS 11960:2018(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 meaning of ISO specific terms and expressions related to conformity assessment,

as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)

see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 67, Materials, equipment and offshore structures for

petroleum and petrochemical and natural gas industries, Subcommittee SC 5, Casing, tubing and drill pipe.

This sixth edition cancels and replaces the fifth edition (ISO 11960:2014).

It is the intention of ISO/TC 67 that either this edition or the previous edition of ISO 11960 be applicable, at the

option of the purchaser (as defined in 4.1.39), for a period of six months from the first day of the calendar

quarter immediately following the date of publication of this edition, after which period the previous edition will

no longer be applicable.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
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 2018 – All rights reserved
© ISO 2017 – All rights reserved iii
---------------------- Page: 4 ----------------------
oSIST prEN ISO 11960:2018
---------------------- Page: 5 ----------------------
oSIST prEN ISO 11960:2018
ISO/DIS 11960:2018(E)
Contents Page
To be edited once document is finalized
ii © ISO 2018 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 11960:2018
ISO/DIS 11960:2018(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 meaning of ISO specific terms and expressions related to conformity assessment,

as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)

see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 67, Materials, equipment and offshore structures for

petroleum and petrochemical and natural gas industries, Subcommittee SC 5, Casing, tubing and drill pipe.

This sixth edition cancels and replaces the fifth edition (ISO 11960:2014).

It is the intention of ISO/TC 67 that either this edition or the previous edition of ISO 11960 be applicable, at the

option of the purchaser (as defined in 4.1.39), for a period of six months from the first day of the calendar

quarter immediately following the date of publication of this edition, after which period the previous edition will

no longer be applicable.
© ISO 2018 – All rights reserved iii
---------------------- Page: 7 ----------------------
oSIST prEN ISO 11960:2018
ISO/DIS 11960:2018(E)
Introduction

Users of this International Standard are advised that further or differing requirements can be needed for

individual applications. This International Standard is not intended to inhibit a vendor from offering, or the

purchaser from accepting, alternative equipment or engineering solutions for the individual application. This

can be particularly applicable where there is innovative or developing technology. Where an alternative is

offered, it is advisable that the vendor identify any variations from this International Standard and provide

details.

This International Standard includes requirements of various nature. These are identified by the use of certain

verbal forms:
 SHALL is used to indicate that a provision is MANDATORY;

 SHOULD is used to indicate that a provision is not mandatory, but RECOMMENDED as good practice;

 MAY is used to indicate that a provision is OPTIONAL.

While efforts have been made to ensure the accuracy of the changes indicated, the user of this International

Standard is advised to consider the total technical content and not only the changes identified. The user is

ultimately responsible for recognising any differences between this edition and the previous edition of this

International Standard. ISO expressly disclaims any liability or responsibility for loss or damage resulting from

inappropriate use of this International Standard on the basis of any inaccuracy in the changes identified.

iv © ISO 2018 – All rights reserved
---------------------- Page: 8 ----------------------
oSIST prEN ISO 11960:2018
DRAFT INTERNATIONAL STANDARD ISO/DIS 11960:2018(E)
Petroleum and natural gas industries — Steel pipes for use as
casing or tubing for wells
1 Scope

1.1 This International Standard specifies the technical delivery conditions for steel pipes (casing, tubing and

pup joints), coupling stock, coupling material and accessory material.

For pipes covered by this International Standard, the sizes, masses and wall thicknesses, as well as, grades

and applicable end-finishes are listed in Tables C.1 and C.2 and Tables E.1 and E.2.

By agreement between the purchaser and manufacturer, this International Standard can also be applied to

other plain-end pipe sizes and wall thicknesses.
API Spec 5L pipe may be ordered as casing in accordance with API RP 5C6.

This International Standard is applicable to the following connections in accordance with API Spec 5B:

 short round thread casing (SC);
 long round thread casing (LC);
 buttress thread casing (BC);
 non-upset tubing (NU);
 external upset tubing (EU);
 integral tubing (IJ).

For such connections, this International Standard specifies the technical delivery conditions for couplings and

thread protection. Supplementary requirements that can optionally be agreed for enhanced leak resistance

connections (LC) are given in A.9 SR22.

This International Standard can also be applied to tubulars with connections not covered by ISO/API

standards.

1.2 The products to which this International Standard is applicable include the following grades of pipe: H40,

J55, K55, N80, L80, C90, R95, T95, P110, C110 and Q125.

1.3 Casing sizes larger than Label 1: 4-1/2 but smaller than Label 1: 10-3/4 can be specified by the

purchaser to be used in tubing service, see Tables C.1, C.23, C.27 and C.28 or Tables E.1, E.23, E.27 and

E.28.

1.4 Supplementary requirements that can optionally be agreed between purchaser and manufacturer for

non-destructive examination, fully machined coupling blanks, upset casing, electric-welded casing, tubing and

pup joints, impact testing, seal ring couplings,enhanced leak resistance, tensile testing, sulfide stress cracking

testing, yield strength, hardenability and hardness testing are given in Annex A.

1.5 This International Standard is not applicable to threading requirements.
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oSIST prEN ISO 11960:2018
ISO/DIS 11960:2018(E)

NOTE Dimensional requirements on threads and thread gauges, stipulations on gauging practice, gauge

specifications, as well as, instruments and methods for inspection of threads are given in API Spec 5B.

2 Conformance
2.1 Dual referencing of normative references

In the interests of world-wide application of this International Standard, ISO/TC 67 has decided, after detailed

technical analysis, that certain normative documents listed in Clause 3 and prepared by ISO/TC 67 or other

ISO Technical Committee are interchangeable in the context of the relevant requirement with the relevant

document prepared by the American Petroleum Institute (API), the American Society for Testing and Materials

(ASTM) or the American National Standards Institute (ANSI). These latter documents are cited in the running

text following the ISO reference and preceded by “or”, for example “ISO XXXX or API YYYY”. Application of

an alternative normative document cited in this manner will lead to technical results different from the use of

the preceding ISO reference. However, both results are acceptable and these documents are thus considered

interchangeable in practice.
2.2 Units of measurement

In this International Standard, data are expressed in both the International System (SI) of units and the United

States Customary (USC) system of units. For a specific order item, it is intended that only one system of units

be used, without combining data expressed in the other system.

Products manufactured to specifications expressed in either of these unit systems shall be considered

equivalent and totally interchangeable. Consequently, compliance with the requirements of this International

Standard as expressed in one system provides compliance with requirements expressed in the other system.

For data expressed in the SI, a comma is used as the decimal separator and a space as the thousands

separator. For data expressed in the USC system, a dot (on the line) is used as the decimal separator and a

space as the thousands separator.
In the text, data in SI units are followed by data in USC units in parentheses.

Separate tables for data expressed in SI units and USC units are given in Annex C and Annex E respectively.

Figures are contained in Annex D and express data in both SI and USC units.
3 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.
ISO 80000-1, Quantities and units — Part 1: General
ISO 643, Steels — Micrographic determination of the apparent grain size
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method

ISO 6506-2, Metallic materials — Brinell hardness test — Part 2: Verification and calibration of testing

machines

ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,

K, N, T)

ISO 6508-2, Metallic materials — Rockwell hardness test — Part 2: Verification and calibration of testing

machines and indenters)

ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

2 © ISO 2018 – All rights reserved
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ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1:

Tension/compression testing machines — Verification and calibration of the force-measuring system

ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual

assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel

substrates and of steel substrates after overall removal of previous coatings

ISO 9513, Metallic materials — Calibration of extensometer systems used in uniaxial testing

ISO/TR 9769, Steel and iron — Review of available methods of analysis

ISO/TR 10400, Petroleum and natural gas industries — Formulae and calculations for casing, tubing, drill pipe

and line pipe

ISO 10893-2, Non-destructive testing of steel tubes — Part 2: Automated eddy current testing of seamless

and welded (except submerged arc-welded) steel tubes for the detection of imperfections

ISO 10893-3, Non-destructive testing of steel tubes — Part 3: Automated full peripheral flux leakage testing of

seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection of

longitudinal and/or transversal imperfections

ISO 10893-5, Non-destructive testing of steel tubes — Part 5: Magnetic particle inspection of seamless and

welded ferromagnetic steel tubes for the detection of surface imperfections

ISO 10893-10, Non-destructive testing of steel tubes — Part 10: Automated full peripheral ultrasonic testing of

seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or

transverse imperfections

ISO 10893-11, Non-destructive testing of steel tubes — Part 11: Automatic ultrasonic testing of the weld seam

of welded steel tubes for the detection of longitudinal and/or transverse imperfections

ISO 11484, Steel products — Employer's qualification system for non-destructive testing (NDT) personnel

ISO 13678, Petroleum and natural gas industries — Evaluation and testing of thread compounds for use with

casing, tubing, line pipe and drill stem elements

ISO 15156-2, Petroleum and natural gas industries — Materials for use in H S-containing environments in oil

and gas production — Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons

ISO/IEC 17011, Conformity assessment — General requirements for accreditation bodies accrediting

conformity assessment bodies

ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories

ANSI/NACE TM0177-2016, Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress

Corrosion Cracking in H S Environments

ANSI/NACE MR0175/ISO 15156, Petroleum and natural gas industries — Materials for use in H S-containing

environments in oil and gas production

API RP 5A3, Recommended Practice on Thread Compounds for Casing, Tubing, Line Pipe, and Drill Stem

Elements

API TR 5C3, Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe Used as

Casing or Tubing; and Performance Properties Tables for Casing and Tubing

API Spec 5B, Specification for Threading, Gauging and Thread Inspection of Casing, Tubing, and Line Pipe

Threads
© ISO 2018 – All rights reserved 3
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oSIST prEN ISO 11960:2018
ISO/DIS 11960:2018(E)
API RP 5C6, Welding Connections to Pipe
ASNT SNT-TC-1A, Recommended Practice No. SNT-TC-1A — Non-Destructive Testing

ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products

ASTM A751, Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

ASTM A941, Standard Terminology Relating to Steel, Stainless Steel, Related Alloys and Ferroalloys

ASTM B117, Standard Practice for Operating Salt Spray (Fog) Apparatus
ASTM E4, Standard Practices for Force Verification of Testing Machines
ASTM E10, Standard Test Method for Brinell Hardness of Metallic Materials
ASTM E18, Standard Test Methods for Rockwell Hardness of Metallic Materials

ASTM E23, Standard Test Methods for Notched Bar Impact Testing of Metallic Materials

ASTM E29, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with

Specifications

ASTM E83, Standard Practice for Verification and Classification of Extensometer Systems

ASTM E112, Standard Test Methods for Determining Average Grain Size
ASTM E213, Standard Practice for Ultrasonic Testing of Metal Pipe and Tubing

ASTM E273, Standard Practice for Ultrasonic Testing of the Weld Zone of Welded Pipe and Tubing

ASTM E309, Standard Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic

Saturation
ASTM E543, Standard Specification for Agencies Performing Nondestructive Testing

ASTM E570, Standard Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products

ASTM E709, Standard Guide for Magnetic Particle Testing

IADC/SPE 11396, B.A. Dale, M.C. Moyer, T.W. Sampson, A Test Program for the Evaluation of Oilfield

Thread Protectors, IADC/SPE Drilling Conference, New Orleans, LA, 20-23 February 1983

MIL-STD-810c, Military Standard: Environmental Test Methods, 10 March 1975
4 Terms, definitions, symbols and abbreviated terms
4.1 Terms and definitions

For the purposes of this document, the terms and definitions given in ASTM A941 for heat treatment

operations and the following apply.
4.1.1
accessory material

seamless casing or tubing, or seamless thick-walled tubes or mechanical tubes, or bar stock or hot forgings

used for the manufacture of accessories
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4.1.2
API threads
threads as specified in API Spec 5B
4.1.3
arc burn

localised point of surface melting caused by arcing between an electrode or ground (earth) and the product

surface

Note 1 to entry: Contact marks, which are intermittent marks adjacent to the weld line of EW pipe resulting from electrical

contact between the electrodes supplying the welding current and the pipe surface, or contact marks resulting from the

use of a spectrometer for the detection of steel chemical composition, are not arc burns.

4.1.4
carload

quantity of product loaded on a railway car for shipment from the product-making facilities

4.1.5
casing
pipe run from the surface and intended to line the walls of a drilled well
4.1.6
connection
threaded assembly of tubular components
4.1.7
controlled cooling

cooling from an elevated temperature in a pre-determined manner to avoid hardening, cracking or internal

damage, or to produce a desired microstructure or mechanical properties
4.1.8
coupling
internally threaded cylinder for joining two lengths of threaded pipe
4.1.9
coupling blank
unthreaded material used to produce an individual coupling
4.1.10
coupling material
thick-walled seamless tube used to manufacture coupling blanks

Note 1 to entry: The main difference between coupling material and coupling stock is that coupling material has no

mandatory NDE inspection requirements (see 10.15). See Clause 9 for mandatory NDE requirements for finished

couplings.
4.1.11
coupling stock
coupling material that meets the coupling stock requirements
4.1.12
defect

imperfection of sufficient magnitude to warrant rejection of the product based on criteria defined in this

International Standard
4.1.13
electric-welded pipe

pipe having one longitudinal seam formed by electric-resistance or electric-induction welding, without the

addition of filler metal, wherein the edges to be welded are mechanically pressed together and the heat for

welding is generated by the resistance to flow of electric current
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4.1.14
full-body
complete cross-section of the product
4.1.15
full-length
complete length of the product (end-to-end)
4.1.16
handling tight

sufficiently tight that the coupling cannot be removed except by the use of a wrench

4.1.17
heat
metal produced by a single cycle of a batch melting process
4.1.18
heat analysis
chemical analysis representative of a heat as reported by the metal producer
4.1.19
imperfection

discontinuity in the product wall or on the product surface that can be detected by a NDE method included in

Table C.42 or Table E.42 of this International Standard
4.1.20
inspection

process of measuring, examining, testing, gauging or otherwise comparing a unit of product with the

applicable requirements
4.1.21
inspection lot
lot

definite quantity of product manufactured under conditions that are considered uniform for the attribute to be

inspected
4.1.22
inspection lot sample

one or more units of product selected from an inspection lot to represent that inspection lot

4.1.23
inspection lot size
number of units of product in an inspection lot
4.1.24
interrupted quenching

quenching in which the product being quenched is removed from the quenching medium while the product is

at a temperature substantially higher than that of the quenching medium
4.1.25
label 1

dimensionless designation for the size or specified outside diameter that may be used when ordering pipe

4.1.26
label 2

dimensionless designation for the mass per unit length that may be used when ordering pipe

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4.1.27
length

piece of pipe that may be plain-end, threaded, or threaded and coupled, that is in accordance with the length

requirements in Clause 8.6, Table C.27 or Table E.27 of this International Standard

4.1.28
linear imperfection

imperfection which includes, but is not limited to, seams, laps, cracks, plug scores, cuts and gouges

NOTE See API Std 5T1.
4.1.29
manufacturer

one or more of the following, depending on the context: pipe mill; processor; threader; coupling manufacturer,

pup-joint manufacturer; accessory manufacturer
NOTE See Clause 14.
4.1.30
non-linear imperfection

imperfection which includes, but is not limited to, pits and round-bottom die stamping

Note 1 to entry: See API Std 5T1.
4.1.31
pipe
casing, tubing and pup joints as a group
4.1.32
pipe mill
firm, company or corporation that operates pipe-making facilities
4.1.33
plain-end pipe
pipe, either upset or non-upset, furnished without threads
4.1.34
processor

firm, company or corporation that operates facilities capable of heat-treating products made by a pipe mill

4.1.35
product

pipe, coupling, coupling stock, coupling material, coupling blank or accessory material, either individually or

collectively as applicable
4.1.36
product test block

test block removed from the product, the tensile test specimen or through-wall hardness test ring

4.1.37
pup joint
casing or tubing of length shorter than Range 1
Note 1 to entry: See Table C.27 or Table E.27.
4.1.38
pup-joint material

casing or tubing, or thick-wall tubes or mechanical tubes, or bar stock used for the manufacture of pup joints

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4.1.39
purchaser

party responsible for both the definition of requirements for a product order and for payment for that order

4.1.40
quench crack

crack in steel resulting from stresses produced during the transformation from austenite to martensite

Note 1 to entry: This transformation is accompanied by an increase in volume.
4.1.41
seamless pipe
wrought steel tubular product made without a weld seam

Note 1 to entry: It is manufactured by hot-working steel, and if necessary, by subsequently cold-working or heat-treating,

or a combination of these operations, to produce the desired shape, dimensions and properties.

4.1.42
skelp
hot-rolled steel strip used for manufacturing EW pipe
4.1.43
special end-finish

threads with thread form and features, manufacturing specifications, dimensions, connection make-up and

performance properties which are beyond the scope of this International Standard
4.1.44
standardised test block

test block, certified to a mean hardness number, used for the verification of the performance of hardness

testing machines
4.1.45
thread protector

cap or insert used to protect threads and seals during handling, transportation and storage

4.1.46
tubing
pipe placed in a well to produce or inject fluids
4.1.47
upper critical temperature
temperature at which austenite begins to transform to ferrite during cooling
4.2 Symbols and abbreviated terms
BC API Spec 5B buttress thread casing connection
B maximum bearing face diameter
CS coupling stock
C Charpy V-notch impact test minimum absorbed energy
CVN Charpy V-notch
D specified outside diameter for pipe
d calculated inside diameter
EMI electromagnetic inspection
EU API Spec 5B external upset tubing connection
EW electric-welded process
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HBW Brinell hardness, when testing with a tungsten carbide ball
HRC Rockwell hardness C-scale
ID inside diameter
IJ API Spec 5B integral tubing connection
k a constant used in the calculation of elongation
LC API Spec 5B long round thread casing connection
N N&T normalised and tempered
NDE non-destructive examination
NIST National Institute of Standards and Technology
NU API Spec 5B non-upset tubing connection
OD outside diameter
PE unthreaded pipe either u
...

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