ISO 11960:2004

INTERNATIONAL ISO
STANDARD 11960
Third edition
2004-12-15
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 2004
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2004
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2004 – All rights reserved

Contents Page
Foreword. vi
Introduction . vii
1 Scope. 1
2 Conformance . 2
2.1 Normative references . 2
2.2 Units of measurement . 2
3 Normative references . 2
4 Terms, definitions, symbols and abbreviated terms. 4
4.1 Terms and definitions. 4
4.2 Symbols and abbreviated terms. 8
5 Information to be supplied by the purchaser.9
5.1 Casing . 9
5.2 Tubing . 11
5.3 Coupling stock and accessories . 12
6 Process of manufacture . 12
6.1 General. 12
6.2 Heat treatment . 13
6.3 Straightening . 13
6.4 Traceability . 14
6.5 Processes requiring validation. 15
7 Material requirements. 15
7.1 Chemical composition. 15
7.2 Tensile properties . 15
7.3 Charpy V-notch test — General requirements. 16
7.4 Charpy V-notch test — Absorbed energy requirements for coupling stock, coupling
blanks and couplings . 17
7.5 Charpy V-notch test — Absorbed energy requirements for pipe . 18
7.6 Charpy V-notch test — Absorbed energy requirements for casing and tubing accessories . 20
7.7 Maximum hardness. 21
7.8 Hardness variation — Grades C90, T95 and Q125 . 21
7.9 Process control — Grades C90, T95 and Q125. 21
7.10 Hardenability — Minimum percentage martensite for quenched and tempered products . 21
7.11 Grain size — Grades C90 and T95. 22
7.12 Surface condition — Grades L80 9Cr and L80 13Cr. 22
7.13 Flattening — Electric-welded pipe . 22
7.14 Sulfide stress cracking test — Grades C90 and T95. 22
8 Dimensions, masses, tolerances, pipe ends and defects . 24
8.1 Labels and sizes. 24
8.2 Dimensions and masses . 24
8.3 Diameter. 24
8.4 Wall thickness . 25
8.5 Mass . 25
8.6 Length . 25
8.7 Casing jointers . 25
8.8 Height and trim of electric-weld flash. 26
8.9 Straightness . 26
8.10 Drift requirements . 27
8.11 Tolerances on dimensions and masses. 27
8.12 Pipe ends.28
8.13 Defects.30
8.14 Coupling make-up and thread protection.30
9 Couplings .31
9.1 General requirements .31
9.2 Alternative grades or heat treatments.31
9.3 Process of manufacture — Groups 1, 2 and 3 .32
9.4 Process of manufacture — Grade Q125 .32
9.5 Mechanical properties .32
9.6 Dimensions and tolerances.32
9.7 Regular couplings .32
9.8 Special-clearance couplings — Groups 1, 2 and 3.33
9.9 Combination couplings .33
9.10 Reducing couplings — Groups 1, 2 and 3 .33
9.11 Seal-ring couplings .33
9.12 Special-bevel tubing couplings — Groups 1, 2 and 3 .33
9.13 Threading .33
9.14 Surface inspection .34
9.15 Measurement of imperfections .35
9.16 Repair and removal of imperfections and defects.35
9.17 Thread surface treatment — Grade Q125 .35
9.18 Couplings and coupling blank protection — Grades C90, T95 and Q125.35
10 Inspection and testing .35
10.1 Test equipment.35
10.2 Lot definition for testing of mechanical properties .35
10.3 Testing of chemical composition .36
10.4 Tensile tests.37
10.5 Flattening test.39
10.6 Hardness test.40
10.7 Impact test.44
10.8 Grain size determination — Grades C90 and T95.46
10.9 Hardenability — Grades C90 and T95 .46
10.10 Sulfide stress-cracking test — Grades C90 and T95.46
10.11 Metallographic evaluation — EW Grades P110 and Q125 .46
10.12 Hydrostatic tests .46
10.13 Dimensional testing .48
10.14 Visual inspection.51
10.15 Non-destructive examination (NDE).51
11 Marking.58
11.1 General .58
11.2 Stamp marking requirements.59
11.3 Stencil marking requirements.60
11.4 Colour identification.60
11.5 Thread and end-finish marking — All groups .61
11.6 Pipe-threader marking requirements — All groups.61
12 Coating and protection .62
12.1 Coatings — All groups.62
12.2 Thread protectors.62
13 Documents .63
13.1 Electronic media — All groups .63
13.2 Certification — Groups 1, 2 and 3.63
13.3 Certification requirements — Grade Q125.63
13.4 Retention of records .63
14 Minimum facility requirements for various categories of manufacturer.64
14.1 Pipe mill.64
14.2 Processor .64
14.3 Pipe threader.64
iv © ISO 2004 – All rights reserved

14.4 Coupling, pup-joint or accessory manufacturer. 64
Annex A (normative) Supplementary requirements . 66
Annex B (normative) Purchaser inspection. 80
Annex C (normative) Tables in SI units. 81
Annex D (normative) Figures in SI (USC) units. 154
Annex E (normative) Tables in USC units. 184
Annex F (informative) Marking instructions for API licensees . 258
Annex G (informative) Procedures used to convert from USC units to SI units. 263
Annex H (normative) Product Specification Levels. 276
Annex I (normative) Requirements for thread protector design validation . 283
Annex J (informative) Summary of Product Specification Level (PSL) requirements . 287
Bibliography . 291

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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 11960 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 5, Casing, tubing and drill pipe.
This third edition cancels and replaces the second edition (ISO 11960:2001), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 11960:2001/Cor.1:2002.
It is the intent of TC 67 that the second and third editions of ISO 11960 both be applicable, at the option of the
purchaser (as defined in 4.1.35), for a period of six months from the first day of the calendar quarter
immediately following the date of publication of this third edition, after which period the second edition will no
longer be applicable.
vi © ISO 2004 – All rights reserved

Introduction
This International Standard is based on API 5CT (Specification for Casing and Tubing).
Users of this International Standard should be aware that further or differing requirements may 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
may be particularly applicable where there is innovative or developing technology. Where an alternative is
offered, the vendor should 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.

INTERNATIONAL STANDARD ISO 11960:2004(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,
plain-end casing liners and pup joints), coupling stock and accessories and establishes requirements for three
Product Specification Levels (PSL-1, PSL-2, PSL-3). The requirements for PSL-1 are the basis of this
International Standard. The requirements that define different levels of standard technical requirements for
PSL-2 and PSL-3, for all Grades except H-40 and L-80 9Cr, are contained in Annex H.
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 to C.3 and Tables E.1 to E.3.
By agreement between the purchaser and manufacturer, this International Standard can also be applied to
other plain-end pipe sizes and wall thicknesses.
This International Standard is applicable to the following connections in accordance with API Spec 5B:
 short round thread casing (STC);
 long round thread casing (LC);
 buttress thread casing (BC);
 extreme-line casing (XC);
 non-upset tubing (NU);
 external upset tubing (EU);
 integral joint tubing (IJ).
For such connections, this International Standard specifies the technical delivery conditions for couplings and
thread protection. Supplementary requirements that may optionally be agreed for enhanced leak resistance
connections are given in Annex A.11 (SR22).
This International Standard can also be applied to tubulars with connections not covered by ISO/API
standards.
1.2 The four groups of products to which this International Standard is applicable include the following
grades of pipe:
 Group 1: All casing and tubing in Grades H, J, K and N;
 Group 2: All casing and tubing in Grades C, L, M and T;
 Group 3: All casing and tubing in Grade P;
 Group 4: All casing in Grade Q.
1.3 Casing sizes larger than Label 1: 4-1/2 but smaller than Label 1: 10-3/4 may be specified by the
purchaser to be used in tubing service, see Tables C.1, C.24, C.30 and C.31 or Tables E.1, E.24, E.30 and
E.31.
1.4 Supplementary requirements that may optionally be agreed between purchaser and manufacturer for
non-destructive examination, coupling blanks, upset casing, electric-welded casing, impact testing, seal ring
couplings and certificates are given in Annex A.
1.5 This International Standard is not applicable to threading requirements.
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 Normative references
In the interests of world-wide application of this International Standard, ISO/TC 67 has decided, after detailed
technical analysis, that certain of the 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 31-0, Quantities and units — Part 0: General principles
ISO 643, Steels — Micrographic determination of the apparent grain size
2 © ISO 2004 – All rights reserved

ISO 6506-1, Metallic materials — Brinell hardness test — Part 1:Test method
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 6892, Metallic materials — Tensile testing at ambient temperature
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 9303, Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes — Full
peripheral ultrasonic testing for the detection of longitudinal imperfections
ISO 9304, Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes — Eddy
current testing for the detection of imperfections
ISO 9305, Seamless steel tubes for pressure purposes — Full peripheral ultrasonic testing for the detection of
transverse imperfections
ISO 9402, Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes — Full
peripheral magnetic transducer/flux leakage testing of ferromagnetic steel tubes for the detection of
longitudinal imperfections
ISO 9598, Seamless steel tubes for pressure purposes — Full peripheral magnetic transducer/flux leakage
testing of ferromagnetic steel tubes for the detection of transverse imperfections
ISO 9764, Electric resistance and induction welded steel tubes for pressure purposes — Ultrasonic testing of
the weld seam for the detection of longitudinal imperfections
ISO/TR 9769, Steel and iron — Review of available methods of analysis
ISO 10400, Petroleum and natural gas industries — Formulae and calculation for casing, tubing, drill pipe and
line pipe properties
ISO 11484, Steel tubes for pressure purposes — Qualification and certification of non-destructive testing
(NDT) personnel
ISO 13665, Seamless and welded steel tubes for pressure purposes — Magnetic particle inspection of the
tube body for the detection of surface imperfections
ISO 13678, Petroleum and natural gas industries — Evaluation and testing of thread compounds for use with
casing, tubing and line pipe
ANSI-NACE TM0177:1996, Laboratory testing of metals for resistance to sulfide stress cracking at ambient
temperature in H S environment
API Bull 5C2, Bulletin on performance properties of casing, tubing and drill pipe
API Bull 5C3, Bulletin on formulas and calculations for casing, tubing, drill pipe and line pipe properties (plus
Supplement 1)
API Spec 5B, Specification for threading, gauging and thread inspection of casing, tubing and line pipe
threads
API Std 5T1, Imperfection terminology
ASNT SNT-TC-1A:1984, Recommended practice, personnel qualification and certification in 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, 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 and Rockwell superficial 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 system
ASTM E112, Standard test methods for determining average grain size
ASTM E213, Standard practice for ultrasonic examination of metal pipe and tubing
ASTM E273, Standard practice for ultrasonic examination 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 E570, Standard practice for flux leakage examination of ferromagnetic steel tubular products
ASTM E709, Standard guide for magnetic particle examination
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 Environmental Test Methods, March 10, 1975
4 Terms, definitions, symbols and abbreviated terms
4.1 Terms and definitions
For the purposes of this document, the terms and definitions in ASTM A941 for heat treatment operations and
the following apply.
4.1.1
accessory material
seamless standard casing or tubing, or seamless thick-wall tubes or mechanical tubes, or bar stock or hot
forgings used for the manufacture of accessories
4.1.2
API threads
threads as specified in API Spec 5B
4 © ISO 2004 – All rights reserved

4.1.3
carload
quantity of pipe loaded on a railway car for shipment from the pipe-making facilities
4.1.4
casing
pipe run from the surface and intended to line the walls of a drilled well
4.1.5
casing and tubing accessory
one-piece tubular section used in a pipe string to provide mechanical and pressure integrity within the pipe
string and facilitate the performance of some other function required of that pipe string
EXAMPLES Crossover connectors, swages, nipples, flow couplings, blast joints, etc.
NOTE Accessories exclude the other tubular products specifically defined in this International Standard or products
included in other ISO (API) specifications.
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 stock
seamless thick-wall tube or mechanical tube used for the manufacture of coupling blanks
4.1.11
defect
imperfection of sufficient magnitude to warrant rejection of the product based on criteria defined in this
International Standard
4.1.12
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
4.1.13
handling tight
sufficiently tight that the coupling cannot be removed except by the use of a wrench
4.1.14
heat
metal produced by a single cycle of a batch melting process
4.1.15
heat analysis
chemical analysis representative of a heat as reported by the metal producer
4.1.16
imperfection
discontinuity in the product wall or on the product surface that can be detected by a NDE method included in
Table C.62 or Table E.62 of this International Standard
4.1.17
inspection
process of measuring, examining, testing, gauging or otherwise comparing a unit of product with the
applicable requirements
4.1.18
inspection lot
definite quantity of product manufactured under conditions that are considered uniform for the attribute to be
inspected
4.1.19
inspection lot sample
one or more units of product selected from an inspection lot to represent that inspection lot
4.1.20
inspection lot size
number of units of product in an inspection lot
4.1.21
interrupted quenching
quenching in which the pipe being quenched is removed from the quenching medium while the pipe is at a
temperature substantially higher than that of the quenching medium
4.1.22
label 1
dimensionless designation for the size or specified outside diameter that may be used when ordering pipe
4.1.23
label 2
dimensionless designation for the mass per unit length that may be used when ordering pipe
4.1.24
length
piece of pipe that may be plain-end, threaded, or threaded and coupled, that is in accordance with the range
requirements in Table C.30 or Table E.30 of this International Standard
4.1.25
linear imperfection
imperfection which includes, but is not limited to, seams, laps, cracks, plug scores, cuts and gouges
NOTE See API Std 5T1.
4.1.26
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.
6 © ISO 2004 – All rights reserved

4.1.27
non-linear imperfection
imperfection which includes, but is not limited to, pits and round-bottom die stamping
NOTE See API Std 5T1.
4.1.28
pipe
casing, tubing, plain-end casing liners and pup joints as a group
4.1.29
pipe mill
firm, company or corporation that operates pipe-making facilities
4.1.30
plain-end casing liner
casing provided unthreaded and with a wall thickness often greater than that specified for J55
4.1.31
processor
firm, company or corporation that operates facilities capable of heat-treating pipe made by a pipe mill
4.1.32
product
pipe, coupling, accessory, coupling stock or coupling blank, either individually or collectively as applicable
4.1.33
pup joint
casing, tubing or plain-end casing liner of length shorter than Range 1
4.1.34
pup-joint material
standard casing or tubing, or thick-wall tubes or mechanical tubes, or bar stock used for the manufacture of
pup joints
4.1.35
purchaser
party responsible for both the definition of requirements for a product order and for payment for that order
4.1.36
quench crack
crack in steel resulting from stresses produced during the transformation from austenite to martensite
NOTE This transformation is accompanied by an increase in volume.
4.1.37
seamless pipe
wrought steel tubular product made without a weld seam
NOTE 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.
4.1.38
skelp
hot-rolled steel strip used for manufacturing EW pipe
4.1.39
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
4.1.40
thread protector
cap or insert used to protect threads and seals during handling, transportation and storage
4.1.41
tubing
pipe placed within a well and serving to produce well fluids or to inject fluids
4.1.42
upper critical temperature
Ar
temperature at which austenite begins to transform to ferrite during cooling
4.2 Symbols and abbreviated terms
BC buttress thread casing connection
C Charpy V-notch impact test minimum absorbed energy
V
CVN Charpy V-notch
D specified outside diameter for pipe
d calculated inside diameter
EMI electromagnetic inspection
EU external upset tubing connection
EW electric-welded process
FBH flat-bottomed hole
HBW Brinell hardness, when testing with a tungsten carbide ball
HRC Rockwell hardness C-scale
ID inside diameter
IJ integral joint tubing connection
k a constant used in the calculation of elongation
LC long round thread casing connection
N ·heat-treat processÒ full-length normalized
N&T normalized and tempered
NDE non-destructive examination
NU non-upset tubing connection
OD outside diameter
PSL product specification level
Q quenched and tempered
S seamless process (when not referencing the chemical element sulfur)
8 © ISO 2004 – All rights reserved

Sc minimum acceptable result of the ANSI-NACE TM0177:1996 Method B test
SCC special clearance coupling
SSC sulfide stress cracking
STC short round thread casing connection
t specified wall thickness
T&C threaded and coupled
USC United States customary (units)
UT ultrasonic testing
W specified outside diameter for couplings with API threads other than special clearance couplings
W specified outside diameter of special clearance couplings with API threads
c
XC extreme line casing connection
YS specified maximum yield strength
max
YS specified minimum yield strength
min
5 Information to be supplied by the purchaser
5.1 Casing
5.1.1 When enquiring or placing orders for pipe to be manufactured in accordance with this International
Standard, the purchaser shall specify the following:
Requirement Reference
Standard ISO 11960 or API 5CT
Quantity
Type of pipe or couplings
Casing:
Threaded or plain-end 8.12
Type of connection: round (short or long), buttress, 8.12, Table C.1 or Table E.1
extreme-line threads, or other connection
With or without couplings 8.12
Special clearance couplings 9.8, Tables C.1, C.36 or Tables E.1,
E.36
Liners: 8.12.1, Table C.2 or Table E.2
Label 1 or specified outside diameter Tables C.1, C.2 or Tables E.1, E.2
Label 2 or specified mass or wall thickness Tables C.1, C.2 or Tables E.1, E.2
Grade and type where applicable Tables C.1, C.2, C.5 or Tables E.1,
E.2, E.5
Range length 8.6, Table C.30 or Table E.30
Seamless or electric-welded 6.1, Table C.4 or Table E.4
Critical thickness for special end-finish couplings, stock or blanks 7.6.6
Critical thickness for special end-finish accessories 7.6.6
Wall thickness verification of special end-finish accessories 10.13.4
Delivery date and shipping instructions
Inspection by purchaser Annex B
5.1.2 The purchaser shall also state on the purchase agreement the requirements, where applicable,
concerning the following stipulations, which are at the purchaser’s option:
Requirement Reference
Heat treatment 6.2
Lower alternative impact test temperature 7.3.7
Casing jointers 8.7
Alternative drifting requirements 8.10
Casing with couplings detached 8.14
Coupling make-up (other than power-tight) 8.14
Coupling blanks 9.2, A.4 (SR9)
Seal ring couplings 9.11, A.8 (SR13)
Heat and supplementary analyses 10.3
Additional markings 11
Pipe coatings 12.1
Material certification 13.2, A.9 (SR15)
PSL 2 or 3 Annex H
5.1.3 The following may be agreed between purchaser and manufacturer:
Requirement Reference
Cold rotary straightening - Grade Q125 6.3.5
Statistical impact testing 7.3.8, A.7 (SR12)
Impact of Group 1 non-heat-treated pipe 7.5.1, A.10 (SR16)
Sulfide stress cracking test - Grades C90 and T95 7.14
Length of accessories 8.6
Thread and storage compound 8.14
Waiving NDE of Group 1 couplings in Grades H40, J55 and K55 9.14.3
Coupling thread plating - Grade Q125 only 9.17
Additional hardness testing - Grades M65 and L80 10.6.2
Additional hardness testing - Grades C90 and T95 10.6.2
Reduced section tensile specimens – Grade Q125 10.4.6
Hydrostatic pressure test for handling-tight make-up, accessories and 10.12.2
Group 4 pup-joints
Alternative hydrostatic test pressures 10.12.3
Plain-end Grade Q125 casing hydrostatic testing 10.12.2
Non-destructive examination 10.15, A.2 (SR1), A.3 (SR2),
A.5 (SR10) and A.6 (SR11)
Marking requirements 11.1
Thread protectors 12.2
Coupling blanks – Grade Q125 only A.4 (SR9)
Upset casing – Grade Q125 only A.5 (SR10)
Electric-weld casing – Grades P110 and Q125 A.6 (SR11)
Alternative F factor in SR 12 – Grade Q125 A.7 (SR12.2)
Special end-finish for casing, couplings, pup joints or accessories 8.12.8, 9.13.2
Quality assurance requirements
Special size and wall thickness 8.2
Enhanced leak resistance LTC connections A.11 (SR22)
10 © ISO 2004 – All rights reserved

5.2 Tubing
5.2.1 When enquiring or placing orders for pipe to be manufactured in accordance with this International
Standard, the purchaser shall specify the following:
Requirement Reference
Standard ISO 11960 or API 5CT
Quantity
Type of pipe or couplings
Tubing:
Non-upset, external-upset or integral joint Table C.3 or Table E.3
Threaded, plain-end, or other connection
...