GB/T 9253-2022 English PDFGB/T 9253: Historical versions
Basic dataStandard ID: GB/T 9253-2022 (GB/T9253-2022)Description (Translated English): Petroleum and natural gas industries - Threading, gauging and thread inspection of casing, tubing, and line pipe threads Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: E92 Classification of International Standard: 75.180.10 Word Count Estimation: 138,167 Date of Issue: 2022-12-30 Date of Implementation: 2023-04-01 Older Standard (superseded by this standard): GB/T 9253.2-2017 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 9253-2022: Petroleum and natural gas industries - Threading, gauging and thread inspection of casing, tubing, and line pipe threads---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 75.180.10 CCSE92 National Standards of People's Republic of China Replace GB/T 9253.2-2017 Casing, tubing and line pipe for the oil and gas industry Thread processing, measurement and inspection Posted on 2022-12-30 2023-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee table of contentsPreface III 1 Scope 1 2 Normative references 1 3 Terms, Definitions, Symbols and Abbreviations 1 3.1 Terms and Definitions 1 3.2 Symbols and abbreviations 5 4 General principles 6 5 Thread dimensions and tolerances --- line pipe, round thread casing and oil pipe, buttress thread casing 7 5.1 Thread design 7 5.2 Thread profile, dimensions and tolerances 7 5.3 Thread accuracy 7 5.4 Thread measurement 19 5.5 Visual inspection 19 5.6 Chamfering 20 5.7 Internal thread 20 5.8 Thread surface treatment 20 5.9 Thread control 20 5.10 Thread parameters 20 5.11 Coupling axes do not coincide 21 5.12 Inspection of misalignment of coupling axes (optional) 21 5.13 Rejection of non-coincident male thread axes (at the option of the purchaser) 21 5.14 Full top thread length 21 5.15 Round nose end 21 6 Thread inspection (line pipe, round thread casing and oil pipe, buttress type thread casing thread single parameter inspection) 21 6.1 Precautions 21 6.2 Measurement position 22 6.3 Measurement of taper 24 6.4 Pitch measurement 29 6.5 Profile height and crest height measurement 31 6.6 Angle and thread profile measurement 39 6.7 Partial trapezoidal single surface profile gauge 41 6.8 Coincidence of coupling thread axes 43 6.9 Calibration of instruments and indicators 45 7 Measuring method of thread top diameter, ovality and thread size (tight distance) 45 7.1 General 45 7.2 Measurement requirements 45 7.3 Top diameter measurement position 46 7.4 Thread diameter gauge requirements 46 7.5 average top diameter 47 7.6 Ovality 47 7.7 Influence of Thread Ovality 48 7.8 Changes in close distance due to thread ovality 48 7.9 Requirements for thread (close pitch) gauges 50 7.10 Tolerance 50 7.11 Gauge Calibration Hold 50 7.12 Gauge acceptance 50 7.13 Changes in S-values 53 7.14 Recalibration 53 8 Gauge specification (line pipe, round thread casing and oil pipe, buttress thread casing) 53 8.1 Calibration gauge 53 8.2 Work gauges 59 8.3 Pitch 60 8.4 Taper 60 8.5 profile height 60 8.6 Tooth bottom shape 60 8.7 Gauge length 60 8.8 Calibration plug gauge --- centering device 60 8.9 Close pairing distance 61 8.10 Mark 61 8.11 Marking of the top diameter gauge setting standard block 62 9 API gauge calibration 62 9.1 Calibration mechanism 62 9.2 Calibration 62 9.3 Close distance 62 9.4 Markup Verification 63 9.5 Standard blocks 63 10 thread mark 63 Appendix A (Normative) Supplementary Requirements for Enhanced Anti-Leakage LC Casing Thread 64 A.1 General requirements 64 A.2 Enhanced anti-leakage LC connection 64 Appendix B (Normative) International System of Units (SI) Data Sheet 67 Appendix C (Normative) US Customary System Data Sheet 100 References 133forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document replaces GB/T 9253.2-2017 "Machining, Measurement and Inspection of Casing, Tubing and Line Pipe Threads in Oil and Gas Industry Test". Compared with GB/T 9253.2-2017, except for structural adjustment and editorial changes, the main technical changes in this document are as follows. a) Delete the content of the direct connection bushing (see Chapter 1, Appendix F of the.2017 edition); b) Added crest height, crest diameter, crest flattening height, effective thread length, hand tightness, close distance, vanishing point, ellipticity, complete thread length Terms and definitions such as degree, pitch cone, machine tightness, taper, number of teeth, etc. (see 3.1); c) Added abbreviations such as BC, LC, LP, MOW, Rd, SC, TECL, TPI (see 3.2); d) Schematic diagrams of measurement distance (see Figure 14~17) and schematic diagrams of single-item calibration (see Figure 23~24, Figure 29~ Figure 34) and a schematic diagram of thread measurement (see Figure 25 to Figure 28, Figure 39 to Figure 46, Figure 49, Figure 52 to Figure 59); e) Added requirements for thread crest height gauges and standard blocks, and requirements for crest height measurement (see 6.5, Figure 28, Figure 31, Figure 34, Figure 35, Figure 39, Figure 43); f) The measurement requirements of the thread profile and angle and the measurement requirements of the partial trapezoidal thread profile single-meter gauge have been changed (see 6.6.3, Figure 45~ Figure 46, 6.7.2, Figure 47, Figure 48, 6.6.2, Figure 17, 6.7.2, Figure 18, Figure 19 of the.2017 edition); g) The measurement of thread pitch diameter (top diameter) is added, including. measurement position, gauge requirements, average diameter, ellipticity, ovality and close distance Influence of tolerance and calculation formula (see 7.1~7.8, Figure 54~Figure 59); h) Changed the calibration organization (see 9.1, 9.1 of the.2017 edition), and deleted the API gauge calibration organization requirements (see the appendix of the.2017 edition record B); i) Deleted the shipping instructions for calibration gauges (see Appendix A of the.2017 edition); j) In the size table, the dimensions of crest height, crest diameter C12 at M12 of internal thread, C11 of crest diameter of large end face, crest diameter of C10 at L10 of external thread, Small end top diameter C9 size (see Table B.1 or Table C.1, Table B.4 or Table C.4, Table B.5 or Table C.5, Table B.7 or Table C.7, Table B.8 or Table C.8); k) Increased the tolerances of the average top diameter, ovality, and crest height in the thread size tolerance table, and modified the tolerance of the tooth profile height (see Table B.2 or Table C.2, Table B.6 or Table C.6, Table B.13 or Table C.13); l) Increased the size of the crest height standard calibration block (see Table B.23 or Table C.23); m) Added the maximum ovality size table allowed for various specifications of casing and tubing and the incremental table for a given elliptical alignment distance (see Table B.25 or Table C.25, Table B.27 or Table C.27). Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Petroleum and Natural Gas Standardization Technical Committee (SAC/TC355). This document is drafted by. China Petroleum Engineering Materials Research Institute Co., Ltd., Baoji Petroleum Machinery Co., Ltd., Beijing Longsheng Tyco Petroleum Pipe Technology Co., Ltd., Baoji Petroleum Steel Pipe Co., Ltd., Xi'an Tairui Precision Machinery Technology Co., Ltd., Tianjin Steel Pipe Co., Ltd. Manufacturing Co., Ltd., Xi'an Sanhuan Petroleum Pipe Technology Co., Ltd. The main drafters of this document. Yang Lineng, Fang Wei, Feng Zhenjun, Chen Xinyi, Wei Zunyi, Zhang Tianyun, Yuan Qingying, Zhou Yumeng, Wang Xiaojing, Li Qun, An Jianbo, Lu Hua, Zhao Sen. This document was first published in 1988 as GB/T 9253.2-1988~GB/T 9253.7-1988, and was first revised in.1999 as GB/T 9253.2-1999, the second revision in.2017, this time is the third revision. Casing, tubing and line pipe for the oil and gas industry Thread processing, measurement and inspection1 ScopeThis document specifies the connecting threads of line pipe, round thread casing, round thread oil pipe and trapezoidal thread casing used in the oil and gas industry (abbreviated Requirements for dimensions, tolerances and markings of API threads) and gauges, as well as instruments and methods for inspecting API threads and gauges. This document applies to the processing, measurement and inspection of casing, tubing and line pipe threads for the oil and gas industry. This document also applies to control thread acceptance gauges, including individual parameter gauges and instruments used to inspect API threads.2 Normative referencesThe contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 23512 Evaluation and test of thread compound for casing, tubing, line pipe and drill string components of petroleum and natural gas industry GB/T 27025 General requirements for the competence of testing and calibration laboratories 3 Terms, Definitions, Symbols and Abbreviations 3.1 Terms and Definitions The following terms and definitions apply to this document. 3.1.1 High addendum The distance from the thread pitch cone to the crest cone. Note. The corresponding term is root height, see GB/T 14791 for details. 3.1.2 Angular displacement angular misalignment A measure of the angular misalignment of one or both thread cones of a coupling from the axis of the thread cone of a rotating shaft. 3.1.3 Specification code sizedesignation A dimensionless code for a specification or specified outer diameter. 3.1.4 Black-crested threads black-crested threads A thread in which the crest is incomplete because the original rolled surface has not been removed. Note 1.Non-full top thread has been called black top thread in the past. Note 2.Non-full top threads are not necessarily black top. 3.1.5 Glitchburr Localized rough or thin ridges or protrusions resulting from mechanical damage or machining. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 9253-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 9253-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 9253-2022_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 9253-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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