ISO/TC 67/SC 5 - Casing, tubing and drill pipe

This document provides procedures for assessment of casing connections for those field applications in which the operating temperatures cyclically vary between minimum values appreciably below 180 °C and maximum values that range from 180 °C to 350 °C or above, and in which the primary axial loading on the casing-connection system is strain-based and driven by constrained thermal expansion and leads to a stress state that exceeds the casing-connection system's yield envelope. NOTE This document can be considered complementary to ISO 13679 (and its core content per API Specification 5C5), which applies to classic elastic-design applications. This document contains an evaluation procedure for a candidate connection comprising of uniquely defined pin, box and interfacial components. The evaluation procedure includes: — Material property tests to assess relevant properties of the candidate connection pin and box components; — Analytical tasks to determine configuration of connection samples for physical tests, which are chosen based on worst-case combinations of the connection geometry and material properties; — Full-scale testing tasks to measure the candidate connection galling resistance, structural integrity and sealability under loading representative of connection assembly and thermal well service. This document does not address impacts of external pressure, incomplete lateral pipe support, rotational fatigue, formation-induced shear, or environmentally-induced corrosion or cracking. Clause 6 describes fundamental assumptions adopted in this document.

This document specifies requirements for ceramic lined tubing (CLT) used in the petroleum and natural gas industries, including configuration and materials, manufacturing, inspection and testing, marking, packaging, transportation, and storage. This document is applicable to CLT manufactured by centrifugal self-propagating high-temperature synthesis. The applicable outside diameter of CLT ranges from 42,16 mm (1,66 inch) to 114,3 mm (4-1/2 inch). The steel grades include H40, J55, and N80 type 1. NOTE Applicability of this document to other sizes and higher steel grades can be by agreement between the manufacturer and the purchaser. CLT is suitable for extracting multiphase fluid, hydrocarbon gas, hydrocarbon liquid, and water under corrosive, abrasive, wax deposition, scaling, and high temperature environments.

This document specifies the technical delivery conditions for corrosion-resistant alloy seamless tubular products for casing, tubing, coupling stock and accessory material (including coupling stock and accessory material from bar) for two product specification levels: — PSL-1, which is the basis of this document; — PSL-2, which provides additional requirements for a product that is intended to be both corrosion and cracking resistant for the environments and qualification method specified in Annex G and in the ISO 15156 series. At the option of the manufacturer, PSL-2 products can be provided in lieu of PSL-1. NOTE 1 The corrosion-resistant alloys included in this document are special alloys in accordance with ISO 4948-1 and ISO 4948-2. NOTE 2 For the purpose of this document, NACE MR0175 is equivalent to the ISO 15156 series. NOTE 3 Accessory products can be manufactured from coupling stock and tubular material, or from solid bar stock or from bored and heat heat-treated bar stock as covered in Annex F. This document contains no provisions relating to the connection of individual lengths of pipe. This document contains provisions relating to marking of tubing and casing after threading. This document is applicable to the following five groups of products: a) group 1, which is composed of stainless alloys with a martensitic or martensitic/ferritic structure; b) group 2, which is composed of stainless alloys with a ferritic-austenitic structure, such as duplex and super-duplex stainless alloy; c) group 3, which is composed of stainless alloys with an austenitic structure (iron base); d) group 4, which is composed of nickel-based alloys with an austenitic structure (nickel base); e) group 5, which is composed of bar only (Annex F) in age-hardened (AH) nickel-based alloys with austenitic structure. NOTE 4 Not all PSL-1 categories and grades can be made cracking resistant in accordance with the ISO 15156 series and are, therefore, not included in PSL-2.

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.

This document specifies tests to perform in order to determine the galling tendency, sealing performance and structural integrity of casing and tubing connections. "Casing" and "tubing" apply to the service application and not to the diameter of the pipe. This document covers the testing of connections for the most commonly encountered well conditions. Not all possible service scenarios are included. For example, the presence of a corrosive fluid, which can influence the service performance of a connection, is not considered. This document supplements API RP 5C5:2017, the requirements of which are applicable with the exceptions specified in this document.

This document specifies the technical delivery conditions for steel drill-pipes with upset pipe-body ends and weld-on tool joints for use in drilling and production operations in petroleum and natural gas industries for three product specification levels (PSL-1, PSL-2 and PSL-3). The requirements for PSL-1 form the basis of this document. The requirements that define different levels of standard technical requirements for PSL-2 and PSL-3 are in Annex G. This document covers the following grades of drill-pipe: — grade E drill-pipe; — high-strength grades of drill-pipe, grades X, G and S; — enhanced H2S resistance drill pipe, grades D and F. A typical drill-pipe configuration is given, showing main elements and lengths (see Figure B.1). The main dimensions and masses of the grades of drill-pipe are given in both SI units (see Table A.1) and in USC units (see Table C.1). This document can also be used for drill-pipe with tool joints not specified by ISO or API standards. By agreement between purchaser and manufacturer, this document can also be applied to other drill-pipe body and/or tool-joint dimensions. This document lists supplementary requirements that can optionally be agreed between purchaser and manufacturer, for testing, performance verification and non-destructive examination (see Annex E). This document does not consider performance properties, nor performance degradation of the product when in service. NOTE 1 In this document, drill-pipe is designated by label 1, label 2, grade of material (E, X, G, S, D and F), upset type and type of rotary shouldered connection. Designations are used for the purpose of identification in ordering. NOTE 2 Reference can be made to ISO 10424-2 or API Spec 7-2 for the detailed requirements for the threading of drill-pipe tool joints. NOTE 3 Reference can be made to API RP 7G for the performance properties of the drill-pipe.

This document illustrates the formulae and templates necessary to calculate the various pipe properties given in International Standards, including — pipe performance properties, such as axial strength, internal pressure resistance and collapse resistance, — minimum physical properties, — product assembly force (torque), — product test pressures, — critical product dimensions related to testing criteria, — critical dimensions of testing equipment, and — critical dimensions of test samples. For formulae related to performance properties, extensive background information is also provided regarding their development and use. Formulae presented here are intended for use with pipe manufactured in accordance with ISO 11960 or API 5CT, ISO 11961 or API 5D, and ISO 3183 or API 5L, as applicable. These formulae and templates can be extended to other pipe with due caution. Pipe cold-worked during production is included in the scope of this document (e.g. cold rotary straightened pipe). Pipe modified by cold working after production, such as expandable tubulars and coiled tubing, is beyond the scope of this document. Application of performance property formulae in this document to line pipe and other pipe is restricted to their use as casing/tubing in a well or laboratory test, and requires due caution to match the heat-treat process, straightening process, yield strength, etc., with the closest appropriate casing/tubing product. Similar caution is exercised when using the performance formulae for drill pipe. This document and the formulae contained herein relate the input pipe manufacturing parameters in ISO 11960 or API 5CT, ISO 11961 or API 5D, and ISO 3183 or API 5L to expected pipe performance. The design formulae in this document are not to be understood as a manufacturing warranty. Manufacturers are typically licensed to produce tubular products in accordance with manufacturing specifications which control the dimensions and physical properties of their product. Design formulae, on the other hand, are a reference point for users to characterize tubular performance and begin their own well design or research of pipe input properties. This document is not a design code. It only provides formulae and templates for calculating the properties of tubulars intended for use in downhole applications. This document does not provide any guidance about loads that can be encountered by tubulars or about safety margins needed for acceptable design. Users are responsible for defining appropriate design loads and selecting adequate safety factors to develop safe and efficient designs. The design loads and safety factors will likely be selected based on historical practice, local regulatory requirements, and specific well conditions. All formulae and listed values for performance properties in this document assume a benign environment and material properties conforming to ISO 11960 or API 5CT, ISO 11961 or API 5D and ISO 3183 or API 5L. Other environments can require additional analyses, such as that outlined in Annex D. Pipe performance properties under dynamic loads and pipe connection sealing resistance are excluded from the scope of this document. Throughout this document tensile stresses are positive.

ISO 13678:2010 provides requirements, recommendations and methods for the testing of thread compounds intended for use on threaded casing, tubing, and line pipe connections; and for thread compounds intended for use on rotary shouldered connections. The tests outlined are used to evaluate the critical performance properties and physical and chemical characteristics of thread compounds under laboratory conditions. These test methods are primarily intended for thread compounds formulated with a lubricating base grease and are not applicable to some materials used for lubricating and/or sealing thread connections. It is recognized that many areas can have environmental requirements for products of this type. ISO 13678:2010 does not include requirements for environmental compliance. It is the responsibility of the end user to investigate these requirements and to select, use and dispose of the thread compounds and related waste materials accordingly.

ISO 15463:2003 specifies requirements and gives recommendations for field inspection and testing of oil country tubular goods (OCTG). ISO 15463:2003 covers the practices and technology commonly used in field inspection; however, certain practices may also be suitable for mill inspections. ISO 15463:2003 covers the qualification of inspection personnel, a description of inspection methods and apparatus calibration and standardization procedures for various inspection methods. The evaluation of imperfections and marking of inspected OCTG are included. ISO 15463:2003 is applicable to field inspection of OCTG and is not applicable for use as a basis for acceptance or rejection (for which the applicable purchasing specification is applicable, see 5.4.2)

ISO 11960:2014 specifies the technical delivery conditions for steel pipes (casing, tubing and pup joints), coupling stock, coupling material and accessory material and establishes requirements for three Product Specification Levels (PSL-1, PSL-2, PSL-3). The requirements for PSL-1 are the basis of ISO 11960:2014. The requirements that define different levels of standard technical requirements for PSL-2 and PSL-3, for all Grades except H-40, L-80 9Cr and C110, are contained in Annex H. By agreement between the purchaser and manufacturer, ISO 11960:2014 can also be applied to other plain-end pipe sizes and wall thicknesses. ISO 11960:2014 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). ISO 11960:2014 can also be applied to tubulars with connections not covered by ISO/API standards. The four groups of products to which ISO 11960:2014 is applicable include the following grades of pipe: Group 1: All casing and tubing in Grades H, J, K, N and R; 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. 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.

ISO/PAS 12835:2013 is intended for assessment of casing connections for those field applications in which the design of the casing-connection system is strain-based, and in which primary axial loading is on the casing-connection system driven by constrained thermal expansion, and in which that primary loading exceeds the casing-connection system's yield envelope. Consequently, ISO/PAS 12835:2013 should be considered as a protocol that is complementary to ISO 13679, which applies to classic elastic-design applications. ISO/PAS 12835:2013 describes the structure of the Thermal Well Casing Connection Evaluation Protocol (TWCCEP) and provides guidelines for its use by new or repeat TWCCEP users, whose familiarity with the TWCCEP provisions might vary. Clause 6 describes fundamental assumptions adopted in the TWCCEP.

ISO 11960:2010 specifies the technical delivery conditions for steel pipes (casing, tubing and pup joints), coupling stock, coupling material and accessory material and establishes requirements for three product specification levels (PSL-1, PSL-2, PSL-3). The requirements for PSL-1 are the basis of ISO 11960:2010. The requirements that define different levels of standard technical requirements for PSL-2 and PSL-3, for all grades except H-40, L-80 9Cr and C110, are contained in Annex H. For pipes covered by ISO 11960:2010, the sizes, masses and wall thicknesses as well as grades and applicable end-finishes are listed. By agreement between the purchaser and manufacturer, ISO 11960:2010 can also be applied to other plain-end pipe sizes and wall thicknesses. ISO 11960:2010 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) and integral tubing connections (IJ). For such connections, ISO 11960:2010 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. ISO 11960:2010 can also be applied to tubulars with connections not covered by ISO/API standards. The four groups of products to which ISO 11960:2010 is applicable include the following grades of pipe: group 1, including all casing and tubing in grades H, J, K, N and R; group 2, including all casing and tubing in grades C, L, M and T; group 3, including all casing and tubing in grade P; and group 4, including all casing in grade Q. Casing sizes larger than label 1: 4-1/2 but smaller than label 1: 10-3/4 can be specified by the purchaser for use in tubing service. 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, test certificates, tensile testing and sulfide stress cracking testing are given. ISO 11960:2010 is not applicable to threading requirements. 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.

ISO 13680:2010 specifies the technical delivery conditions for corrosion-resistant alloy seamless tubulars for casing, tubing and coupling stock for two product specification levels: PSL-1, which is the basis of ISO 13680:2010; PSL-2, which provides additional requirements for a product that is intended to be both corrosion resistant and cracking resistant for the environments and qualification method specified in ISO 15156-3 and Annex G of ISO 13680:2010. At the option of the manufacturer, PSL-2 products can be provided in lieu of PSL-1. The corrosion-resistant alloys included in ISO 13680:2010 are special alloys in accordance with ISO 4948-1 and ISO 4948-2. ISO 13680:2010 is applicable to the following four groups of product: group 1, which is composed of stainless alloys with a martensitic or martensitic/ferritic structure; group 2, which is composed of stainless alloys with a ferritic-austenitic structure, such as duplex and super-duplex stainless alloy; group 3, which is composed of stainless alloys with an austenitic structure (iron base); group 4, which is composed of nickel-based alloys with an austenitic structure (nickel base). ISO 13680:2010 contains no provisions relating to the connection of individual lengths of pipe.

ISO 13678:2009 provides requirements, recommendations and methods for the testing of thread compounds intended for use on ISO/API thread forms, as well as proprietary casing, tubing, line pipe and drill stem elements with rotary shouldered connections. The tests outlined are used to evaluate the critical performance properties and physical and chemical characteristics of thread compounds under laboratory conditions. These test methods are primarily intended for thread compounds formulated with a lubricating base grease and are not applicable to some materials used for lubricating and/or sealing thread connection. It is recognized that many areas can have environmental requirements for products of this type. ISO 13678:2009 does not include requirements for environmental compliance.

ISO 11961:2008 specifies the technical delivery conditions for steel drill pipes with upset pipe body ends and weld-on tool joints for use in drilling and production operations in petroleum and natural gas industries for three product specification levels (PSL-1, PSL-2 and PSL-3). The requirements for PSL-1 form the basis of this ISO 11961:2008 but those that define different levels of standard technical requirements for PSL-2 and PSL-3 are also given. ISO 11961:2008 covers grade E drill pipe and the high-strength grades X, G and S. A typical drill pipe configuration is given, showing main elements and lengths. The main dimensions and masses of the grades of drill pipe are given in both SI units and in USC units. ISO 11961:2008 can also be used for drill pipe with tool joints not specified by ISO or API standards. By agreement between purchaser and manufacturer, ISO 11961:2008 can also be applied to other drill-pipe body and/or tool-joint dimensions. ISO 11961:2008 lists supplementary requirements that can optionally be agreed between purchaser and manufacturer, for testing, performance verification and non-destructive examination. ISO 11961:2008 does not consider performance properties.

ISO 13680:2008 specifies the technical delivery conditions for corrosion-resistant alloy seamless tubulars for casing, tubing and coupling stock for two product specification levels: PSL-1, which is the basis of ISO 13680:2008; PSL-2, which provides additional requirements for a product that is intended to be both corrosion resistant and cracking resistant for the environments and qualification method specified in ISO 15156-3 and Annex G of ISO 13680:2008. At the option of the manufacturer, PSL-2 products can be provided in lieu of PSL-1. ISO 13680:2008 is applicable to the following four groups of product: group 1, which is comprised of stainless alloys with a martensitic or martensitic/ferritic structure; group 2, which is comprised of stainless alloys with a ferritic-austenitic structure, such as duplex and super-duplex stainless alloy; group 3, which is comprised of stainless alloys with an austenitic structure (iron base); group 4, which is comprised of nickel-based alloys with an austenitic structure (nickel base). ISO 13680:2008 contains no provisions relating to the connection of individual lengths of pipe.

ISO/TR 10400:2007 illustrates the equations and templates necessary to calculate the various pipe properties given in International Standards, including pipe performance properties, such as axial strength, internal pressure resistance and collapse resistance, minimum physical properties, product assembly force (torque), product test pressures, critical product dimensions related to testing criteria, critical dimensions of testing equipment, and critical dimensions of test samples. For equations related to performance properties, extensive background information is also provided regarding their development and use. Equations presented in ISO/TR 10400:2007 are intended for use with pipe manufactured in accordance with ISO 11960 or API 5CT, ISO 11961 or API 5D, and ISO 3183 or API 5L, as applicable. These equations and templates may be extended to other pipe with due caution. Pipe cold-worked during production is included in the scope of this Technical Report (e.g. cold rotary straightened pipe). Pipe modified by cold working after production, such as expandable tubulars and coiled tubing, is beyond the scope of this Technical Report. Application of performance property equations in ISO/TR 10400:2007 to line pipe and other pipe is restricted to their use as casing/tubing in a well or laboratory test, and requires due caution to match the heat-treat process, straightening process, yield strength, etc., with the closest appropriate casing/tubing product. Similar caution should be exercised when using the performance equations for drill pipe. ISO/TR 10400:2007 and the equations contained herein relate the input pipe manufacturing parameters in ISO 11960 or API 5CT, ISO 11961 or API 5, and ISO 3183 or API 5L to expected pipe performance. The design equations in ISO/TR 10400:2007 are not to be understood as a manufacturing warrantee. Manufacturers are typically licensed to produce tubular products in accordance with manufacturing specifications which control the dimensions and physical properties of their product. Design equations, on the other hand, are a reference point for users to characterize tubular performance and begin their own well design or research of pipe input properties. ISO/TR 10400:2007 is not a design code. It only provides equations and templates for calculating the properties of tubulars intended for use in downhole applications. ISO/TR 10400:2007 does not provide any guidance about loads that may be encountered by tubulars or about safety margins needed for acceptable design. Users are responsible for defining appropriate design loads and selecting adequate safety factors to develop safe and efficient designs. The design loads and safety factors will likely be selected based on historical practice, local regulatory requirements, and specific well conditions. All equations and listed values for performance properties in ISO/TR 10400:2007 assume a benign environment and material properties conforming to ISO 11960 or API 5CT, ISO 11961 or API 5D, and ISO 3183 or API 5L. Other environments may require additional analyses, such as that outlined in Annex D. Pipe performance properties under dynamic loads and pipe connection sealing resistance are excluded from the scope of ISO/TR 10400:2007.

ISO 11960:2004 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 ISO 11960:2004. 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. ISO 11960:2004 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, ISO 11960:2004 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). ISO 11960:2004 can also be applied to tubulars with connections not covered by ISO/API standards. For pipes covered by ISO 11960:2004, the sizes, masses and wall thicknesses as well as grades and applicable end finishes are given. By agreement between the purchaser and manufacturer, ISO 11960:2004 can also be applied to other plain end pipe sizes and wall thicknesses. The four groups of products to which ISO 11960:2004 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. 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. 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. ISO 11960:2004 is not applicable to threading requirements.

ISO 13679:2002 establishes minimum design verification testing procedures and acceptance criteria for casing and tubing connections for the oil and natural gas industries. These physical tests are part of a design verification process and provide objective evidence that the connection conforms to the manufacturer's claimed test load envelope and limit loads. It categorizes test severity into four test classes. It describes a system of identification codes for connections. ISO 13679:2002 does not provide the statistical basis for risk analysis. ISO 13679:2002 addresses only three of the five distinct types of primary loads to which casing and tubing strings are subjected in wells: fluid pressure (internal and/or external), axial force (tension or compression), bending (buckling and/or wellbore deviation), as well as make-up torsion. It does not address rotation torsion, non-axisymetric (area, line or point contact). ISO 13679:2002 specifies tests to be performed to determine the galling tendency, sealing performance and structural integrity of casing and tubing connections that apply to the service application and not to the diameter of the pipe.

La présente Norme Internationale est applicable aux assemblages suivants conformément à l'ISO 10422 ou à l'API Spec 5B : - tube de cuvelage à filetage rond court (STC) - tube de cuvelage à filetage rond long (LC) - tube de cuvelage à filetage Buttress (BC) - tubes de cuvelage extreme-line (XC) ; - tube de production sans refoulement (NU) - tube de production à refoulement extérieur (EU) - tube de production à joint intégral (W). Pour ces assemblages, la présente Norme Internationale spécifie les conditions techniques de livraison des manchons et des protecteurs de filetage. Pour les tubes couverts par la présente Norme internationale, les éléments suivants sont définis : dimensions, masses, épaisseurs, grades et types de finition d'extrémité applicables. La présente Norme Internationale peut être aussi appliquée à des produits tubulaires avec des assemblages non définis dans des normes ISO/API. Les quatre groupes de produits, auxquels la présente Norme internationale est applicable, comprennent les nuances suivantes : - Groupe 1 Tous les tubes de cuvelage et de production de nuances H, J, K et N - Groupe 2 Tous les tubes de cuvelage et de production de nuances C, L, M et T - Groupe 3 Tous les tubes de cuvelage et de production de nuance P - Groupe 4 Tous les tubes de cuvelage de nuance Q. Les dimensions de tubes de cuvelage supérieures à Label 1:4-1/2 mais inférieures à Label 1:10-3/4 peuvent être spécifiées par l'acheteur en tant que «service comme tubes de production» ; voir les Tableaux CA, C.24, C.30 et C.31 ou les Tableaux E.1, E.24, E.30 et E.31.

Specifies the technical delivery conditions for steel drill pipes. Describes the group 1, all grade E pipes, and group 3, all drill pipes in high strength grades X95, G105 and S135.

Specifies the technical delivery conditions for steel pipes (casing, tubing for wells), connectors, couplings and thread protectors. Theading requirements are not considered. Dimensional requirements on threads are given in ISO 10422. Replaces ISO 2645:1975.

Establishes the formulae. Requirements are specified in the fifth edition of API BULLETIN 5C3 (Bul 5C3), Juli 1989, which is adopted as ISO 10400. For the purposes of international standardization, modifications have been made that are outlined.

Specifies dimensional requirements on thread and thread gauges, and covers the instruments and methods for the inspection of threads for line pipe, casing and tubing. Requirements are specified in API Specification STD 5B (STD 5B), thirteenth edition, May 31, 1988 which is adopted as ISO 10422. For the purposes of international standardization, modifications shall apply to specific clauses and paragraphs of API STD 5B. These modifications are outlined.