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

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.

Industries du pétrole et du gaz naturel -- Tubes d'acier utilisés comme cuvelage ou tubes de production dans les puits

General Information

Status
Published
Publication Date
30-Mar-2020
Current Stage
6060 - International Standard published
Start Date
15-Nov-2019
Completion Date
31-Mar-2020
Ref Project

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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: 1 ----------------------
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
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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
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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

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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

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ISO 11960:2020(E)

10.4 Tensile tests ............................................................................................................................................................................................41

10.4.1 Stress-relief temperature — All grades ......................................................................

...

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