1、Specification for Casing and TubingAPI SPECIFICATION 5CTNINTH EDITION, JULY 2011EFFECTIVE DATE: JANUARY 1, 2012ERRATA, SEPTEMBER 2012Specification for Casing and TubingUpstream SegmentAPI SPECIFICATION 5CTNINTH EDITION, JULY 2011EFFECTIVE DATE: JANUARY 1, 2012ERRATA, SEPTEMBER 2012Special NotesAPI p
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14、inst liability for infringement of letters patent.Shall: As used in a standard, “shall” denotes a minimum requirement in order to conform to the specification.Should: As used in a standard, “should” denotes a recommendation or that which is advised but not required in orderto conform to the specific
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17、e addressed to the director.Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least every five years. A one-timeextension of up to two years may be added to this review cycle. Status of the publication can be ascertained from theAPI Standards Department, telephone (202)
18、682-8000. A catalog of API publications and materials is publishedannually by API, 1220 L Street, NW, Washington, DC 20005.Suggested revisions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW,Washington, DC 20005, standardsapi.org.iiivContents Page Introduction
19、 viii 1 Scope 1 2 Conformance 2 2.1 Dual referencing of normative references 2 2.2 Units of measurement . 2 3 Normative references 3 4 Terms, definitions, symbols and abbreviated terms . 5 4.1 Terms and definitions . 5 4.2 Symbols and abbreviated terms 9 5 Information to be supplied by the purchaser
20、 . 10 5.1 Grades C90, T95 and C110 . 10 5.2 Casing . 10 5.3 Tubing . 12 5.4 Coupling stock, coupling material and accessory material 13 6 Process of manufacture 14 6.1 General . 14 6.2 Heat treatment 14 6.3 Straightening 15 6.4 Traceability . 16 6.5 Processes requiring validation 16 7 Material requi
21、rements . 17 7.1 Chemical composition 17 7.2 Tensile properties 17 7.3 Charpy V-notch test General requirements . 18 7.4 Charpy V-notch Absorbed energy requirements for coupling stock, coupling material, coupling blanks and couplings 19 7.5 Charpy V-notch Absorbed energy requirements for pipe 21 7.6
22、 Charpy V-notch Absorbed energy requirements for accessory material . 22 7.7 Maximum hardness . 23 7.8 Hardness variation Grades C90, T95, C110 and Q125 24 7.9 Process control Grades C90, T95, C110 and Q125 . 24 7.10 Hardenability Minimum percentage martensite for quenched and tempered products . 24
23、 7.11 Grain size Grades C90, T95 and C110 25 7.12 Surface condition Grades L80 9Cr and L80 13Cr 25 7.13 Flattening Electric-welded pipe . 25 7.14 Sulfide stress cracking test Grades C90, T95 and C110 . 25 8 Dimensions, masses, tolerances, product ends and defects . 28 8.1 Labels and sizes 28 8.2 Dim
24、ensions and masses . 28 8.3 Diameter . 29 8.4 Wall thickness 29 8.5 Mass 29 8.6 Length . 30 8.7 Casing jointers . 30 vi8.8 Height and trim of electric-weld flash . 30 8.9 Straightness 31 8.10 Drift requirements . 31 8.11 Tolerances on dimensions and masses . 31 8.12 Product ends . 33 8.13 Defects .
25、34 8.14 Coupling make-up and thread protection 35 9 Couplings 35 9.1 General requirements . 35 9.2 Alternative grades or heat treatments 35 9.3 Mechanical properties 36 9.4 Dimensions and tolerances . 36 9.5 Regular couplings . 36 9.6 Special-clearance couplings Groups 1, 2 and 3 . 37 9.7 Combinatio
26、n couplings 37 9.8 Reducing couplings Groups 1, 2 and 3 . 37 9.9 Seal-ring couplings . 37 9.10 Special-bevel tubing regular couplings Groups 1, 2 and 3 . 37 9.11 Threading . 37 9.12 Surface inspection 38 9.13 Measurement of imperfections 38 9.14 Repair and removal of imperfections and defects 38 9.1
27、5 Thread surface treatment Grade Q125 . 39 9.16 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 10.3 Testing of chemical composition 40 10.4 Tensile tests 41
28、10.5 Flattening test . 43 10.6 Hardness test 44 10.7 Impact test . 51 10.8 Grain size determination Grades C90, T95 and C110 . 52 10.9 Hardenability Grades C90, T95 and C110 52 10.10 Sulfide stress-cracking test Grades C90, T95 and C110 52 10.11 Metallographic evaluation EW Grades P110 and Q125 53 1
29、0.12 Hydrostatic tests . 53 10.13 Dimensional testing 55 10.14 Visual inspection 58 10.15 Non-destructive examination (NDE) . 58 11 Marking 66 11.1 General . 66 11.2 Stamp marking requirements 67 11.3 Stencil marking requirements . 68 11.4 Colour identification . 69 11.5 Thread and end-finish markin
30、g All groups 70 11.6 Pipe-threader marking requirements All groups 70 12 Coating and protection. 70 12.1 Coatings All groups . 70 12.2 Thread protectors . 71 13 Documents 72 13.1 Electronic media All groups 72 13.2 Certification Groups 1, 2 (except Grade C110) and 3 . 72 vii13.3 Certification requir
31、ements Grades C110 and Q125 . 72 13.4 Retention of records . 72 14 Minimum facility requirements for various categories of manufacturer . 72 14.1 Pipe mill 72 14.2 Processor . 72 14.3 Pipe threader 73 14.4 Coupling, pup-joint or accessory manufacturer 73 Annex A (normative) Supplementary requirement
32、s 74 Annex B (normative) Purchaser inspection 91 Annex C (normative) Tables in SI units . 92 Annex D (normative) Figures in SI (USC) units 143 Annex E (normative) Tables in USC units . 171 Annex F (informative) Use of the API Monogram by Licensees . 221 Annex G (informative) Procedures used to conve
33、rt from USC units to SI units 228 Annex H (normative) Product Specification Levels . 240 Annex I (normative) Requirements for thread protector design validation. 248 Annex J (informative) Summary of Product Specification Level (PSL) requirements . 252 Annex K (normative) Modification of the hydrogen
34、 sulfide titration procedures in ANSI-NACE TM0284-2003, Appendix C 260 Annex L (informative) Technical changes from the previous edition 261 Bibliography 270 viiiIntroduction This Standard is based on the Eighth edition of API Spec 5CT. Users of this Standard are advised that further or differing re
35、quirements can be needed for individual applications. This Standard is not intended to inhibit a vendor from offering, or the purchaser from accepting, alternative equipment or engineering solutions for the individual application. This can be particularly applicable where there is innovative or deve
36、loping technology. Where an alternative is offered, it is advisable that the vendor identify any variations from this Standard and provide details. This Standard includes requirements of various nature. These are identified by the use of certain verbal forms: SHALL is used to indicate that a provisi
37、on 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. Details of the major changes (additions, modifications and deletions) agreed by the committee, and which affect the performance of th
38、e products or the technical requirements applicable to the products, are provided for information in Annex L and are indicated in this Standard by the use of grey shading. Grey shading is also used to indicate editorial changes. Where deletions, but no other changes, have been made, vertical bars ar
39、e used in the margin adjacent to the applicable line or at each side of a cell in a table. Where a complete line or paragraph has been deleted, margin bars next to a blank line are used. While efforts have been made to ensure the accuracy of the changes indicated, the user of this Standard is advise
40、d to consider the total technical content and not only the changes identified. Details of the Errata (September 2012) are indicated in this standard by the use of the symboll “12”. The user is ultimately responsible for recognising any differences between this edition and the previous edition of thi
41、s Standard. 1 Petroleum and natural gas industries Steel pipes for use as casing or tubing for wells 1 Scope 1.1 This Standard specifies the technical delivery conditions for steel pipes (casing, tubing and pup joints), coupling stock, coupling material and accessory material and establishes require
42、ments for three Product Specification Levels (PSL-1, PSL-2, PSL-3). The requirements for PSL-1 are the basis of this Standard. 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
43、. For pipes covered by this Standard, the sizes, masses and wall thicknesses as well as grades and applicable end-finishes are listed in Tables C.1 and C.2 and Tables E.1 and E.2. By agreement between the purchaser and manufacturer, this Standard can also be applied to other plain-end pipe sizes and
44、 wall thicknesses. This Standard is applicable to the following connections in accordance with API Spec 5B: short round thread casing (SC); long round thread casing (LC); buttress thread casing (BC); I I non-upset tubing (NU); external upset tubing (EU); integral tubing (IJ). For such connections, t
45、his Standard specifies the technical delivery conditions for couplings and thread protection. Supplementary requirements that can optionally be agreed for enhanced leak resistance connections (LC) are given in A.11 SR22. This Standard can also be applied to tubulars with connections not covered by A
46、PI standards. 1.2 The four groups of products to which this Standard 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; 12 2 SPECIFICATION FO
47、R CASING AND TUBING 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 can be specified by the purchaser to be used in tubing service, see Tables C.1, C.23, C.27 and C.28 or Tables E.1, E.23, E.27 and E.28. 1.4 Supplementary requirements that
48、 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 g
49、iven in Annex A. 1.5 This 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 Dual referencing of normative references In the interests of world-wide application of this Standard, the technical committee has decided, after detailed technical analysis, that certain of the normati
