Home Cart Quotation About-Us
www.ChineseStandard.net
SEARCH

GB/T 21237-2018 English PDF

US$319.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21237-2018: Wide and heavy plates for line pipe of petroleum and natural gas
Status: Valid

GB/T 21237: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 21237-2018319 Add to Cart 4 days Wide and heavy plates for line pipe of petroleum and natural gas Valid
GB/T 21237-2007439 Add to Cart 3 days Wide and heavy plates for line pipe of petroleum and natural gas Obsolete

Similar standards

GB/T 20887.5   GB/T 20887.4   GB/T 20887.7   GB/T 34200   GB/T 25820   

Basic data

Standard ID: GB/T 21237-2018 (GB/T21237-2018)
Description (Translated English): Wide and heavy plates for line pipe of petroleum and natural gas
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H46
Classification of International Standard: 77.140.50
Word Count Estimation: 16,157
Date of Issue: 2018-05-14
Date of Implementation: 2019-02-01
Older Standard (superseded by this standard): GB/T 21237-2007
Quoted Standard: GB/T 223.5; GB/T 223.12; GB/T 223.16; GB/T 223.19; GB/T 223.26; GB/T 223.40; GB/T 223.54; GB/T 223.58; GB/T 223.59; GB/T 223.68; GB/T 223.69; GB/T 223.76; GB/T 223.78; GB/T 228.1; GB/T 229; GB/T 232; GB/T 247; GB/T 709; GB/T 2975; GB/T 4336; GB/T 4340.1
Regulation (derived from): National Standards Announcement No. 6 of 2018
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard stipulates the classification of heavy and thick steel plates for oil and natural gas pipelines and their grades, dimensions, shapes, weights, technical requirements, test methods, inspection rules, packaging, marks, and quality certificates. This standard applies to thick and thick steel plates (hereinafter referred to as steel plates) with thicknesses of 6 mm to 50 mm for petroleum and natural gas pipelines produced in accordance with ISO 3183, GB/T 9711 and API Spec 5L. Other thick steel plates for fluid transport welded pipes are also applicable. Can refer to this standard.

GB/T 21237-2018: Wide and heavy plates for line pipe of petroleum and natural gas

---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.
Wide and heavy plates for line pipe of petroleum and natural gas ICS 77.140.50 H46 National Standards of People's Republic of China Replace GB/T 21237-2007 Wide and thick steel plate for oil and gas transmission pipe Published on.2018-05-14 Implementation of.2019-02-01 State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 21237-2007 "wide and thick steel plate for oil and gas transmission pipe", compared with GB/T 21237-2007, the main The technical changes are as follows. --- Modified the thickness range from 6mm to 50mm (see Chapter 1, Chapter 1 of the.2007 edition); ---Modified the classification, brand representation and code; increase the classification and code, the brand representation method is divided according to different delivery status Different grades (see Chapter 3, Chapter 3 of the.2007 edition); --- Increased the quality level of PSL1, PSL2, PSL1 quality grade increased the grade L210/A and its related regulations; PSL2 quality The grades have increased the two grades of L625M/X90M and L830M/X120M and their related regulations (see Table 1, Table 2, Table 3, Table 4); ---Modified the content of the order (see Chapter 4, Chapter 4 of the.2007 edition); --- Revised the size, shape, weight and tolerance requirements (see Chapter 5, Chapter 5 of the.2007 edition); --- Revised the chemical composition, mechanics and process properties of each grade (Table 2, Table 3, Table 4,.2007 editions Table 1, Table 2, Table 3); --- Revised the provisions of the smelting method (see 6.3,.2007 edition 6.2); ---Modified the delivery status (see 6.4,.2007 edition 6.3); --- Increased grain size, non-metallic inclusions and banded structure (see 6.6, 6.7, 6.8); --- Revised the requirements for surface quality and special requirements (see 6.9, 6.10,.2007 edition 6.5, 6.7); --- Revised the provisions of test methods, packaging, marking and quality certificates (see Chapter 9, Chapter 9 of the.2007 edition); --- Added provisions for numerical rounding rules (see 8.5); --- Removed Appendix A of the original standard (Appendix A of.2007). This standard was proposed by the China Iron and Steel Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This standard was drafted. Shougang Group Co., Ltd., Metallurgical Industry Information Standards Institute, Jiangsu Shagang Group Co., Ltd., Hunan Hualing Xiangtan Iron and Steel Co., Ltd., Guangzheng Energy Co., Ltd., Steel Research Institute Testing Technology Co., Ltd., Ma Steel (Group) Holdings Co., Ltd. The main drafters of this standard. Shi Li, Shen Qinyi, Li Shaobo, Zhang Weixu, Li Xiaobo, Luo Deng, Zhou Dong, Xu Peng, Li Zhongyi, Ding Wenhua, Nie Wenjin, Xiong Xiangjiang, Ma Changwen, Jia Zhigang. The previous versions of the standards replaced by this standard are. ---GB/T 21237-1997, GB/T 21237-2007. Wide and thick steel plate for oil and gas transmission pipe

1 Scope

This standard specifies the classification and brand representation method, size, shape, weight and technical requirements of wide and thick steel plates for oil and natural gas transmission pipes. Test methods, inspection rules, packaging, marking and quality certificates. This standard applies to the thickness of oil and natural gas transmission pipes produced according to ISO 3183, GB/T 9711 and APISpec5L standards. For wide and thick steel plates of 6mm~50mm (hereinafter referred to as steel plates), other thick and thick steel plates for fluid conveying welded pipes can also refer to this standard.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 223.5 Determination of acid-dissolved silicon and total silicon content - Reducing silyl molybdate spectrophotometric method GB/T 223.12 Methods for chemical analysis of steels and alloys - Sodium carbonate separation - Diphenylcarbonyl hydrazide photometric method GB/T 223.16 Methods for chemical analysis of steels and alloys - Determination of titanium content by chromotropic acid photometric method GB/T 223.19 Methods for chemical analysis of steels and alloys - s. GB/T 223.26 Determination of molybdenum content of steels and alloys - thiocyanate spectrophotometric method GB/T 223.40 Determination of bismuth content of steels and alloys GB/T 223.54 Determination of nickel content by flame atomic absorption spectrophotometry GB/T 223.58 Determination of manganese content - Sodium arsenite - Sodium nitrite titration method GB/T 223.59 Determination of phosphorus content in steels and alloys - phosphine molybdenum blue spectrophotometric method and bismuth phosphomolybdate blue spectrophotometric method GB/T 223.68 Steel and alloy chemical analysis method - Determination of sulfur content by potassium iodate titration after combustion in tubular furnace GB/T 223.69 Determination of carbon content of steels and alloys GB/T 223.76 Determination of vanadium content by flame atomic absorption spectrometry GB/T 223.78 Determination of boron content by direct photometric method with curcumin GB/T 228.1 tensile testing of metallic materials - Part 1 GB/T 229 metal material Charpy pendulum impact test method GB/T 232 metal material bending test method General provisions of GB/T 247 steel and steel strip packaging, marking and quality certificates GB/T 709 hot rolled steel sheet and strip size, shape, weight and tolerance GB/T 2975 steel and steel products mechanical properties test sampling position and sample preparation GB/T 4336 Determination of multi-element content of carbon steel and medium-low alloy steels by spark discharge atomic emission spectrometry (conventional method) GB/T 4340.1 Vickers hardness test for metallic materials - Part 1. Test methods GB/T 6394 method for determination of average grain size of metals GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values GB/T 8363 ferritic steel drop hammer tear test method GB/T 10561 Steel - Determination of non-metallic inclusions - Determination of standard Microstructure evaluation method of GB/T 13299 steel GB/T 14977 General requirements for surface quality of hot rolled steel sheets General technical requirements for the delivery of GB/T 17505 steel and steel products GB/T 20066 Sampling and sample preparation method for samples for determination of chemical composition of steel and iron GB/T 20123 Determination of total carbon and sulfur content of steels - Infrared absorption method after high-frequency induction furnace combustion (conventional method) GB/T 20125 Determination of multi-element of low-alloy steels by inductively coupled plasma atomic spectroscopy

3 classification and brand representation

3.1 Classification 3.1.1 According to the quality level. a) quality level 1 (PSL1); b) Quality Level 2 (PSL2). Note. PSL2 includes increased chemical composition, mechanical properties, toughness, grain size, non-metallic inclusions, hardness and other requirements. Not indicated for a particular PSL The horizontal requirements are equally applicable to PSL1 and PSL2. 3.1.2 According to product use. a) steel for natural gas transmission pipelines; b) steel for crude oil and refined oil pipelines; c) Other fluid conveying steel for welded pipes. 3.1.3 According to the delivery status. a) hot rolling (R); b) normalizing and normalizing rolling (N); c) thermomechanical rolling (M); d) Quenching and tempering (Q). 3.1.4 By edge status. a) trimming (EC); b) Uncut (EM). 3.2 Brand representation 3.2.1 The steel grade is represented by the first English letter of the “Line” representing the transfer line, the minimum yield strength value specified by the steel pipe, and the delivery status (only Applicable to PSL2 quality grade) three parts. Example. L415M. L --- represents the first English letter of the pipeline "Line"; 415--- represents the minimum yield strength value specified in the steel pipe, the unit is MPa (MPa); M --- represents the delivery status of the thermomechanical rolling state (TMCP). 3.2.2 In addition to the 3.2.1 naming, other frequently used grades are also given in Table 1. The grade is specified by the “X” representing the pipeline steel and the steel pipe. The minimum yield strength value and delivery status (only applicable to the PSL2 quality level) are composed of three parts. Example. X60M. X --- represents pipeline steel; 60 --- represents the minimum yield strength value specified by the steel pipe, the unit is ksi (1ksi = 6.895MPa); M --- represents the delivery status of the thermomechanical rolling state (TMCP). Note. The specified minimum yield strength is not included in the steel grade A and steel grade B grades. 3.2.3 The delivery status and grades of PSL1 and PSL2 grade steels are shown in Table 1. 3.2.4 Refer to Appendix A for a comparison table between this standard grade and related standard grades. Table 1 PSL1 and PSL2 quality grade delivery status and grades Quality grade delivery status grade quality grade delivery status grade PSL1 Hot rolling, normalizing, Normalizing rolling Hot rolling, normalizing, Normalizing rolling, Thermomechanical rolling L210/A L245/B L290/X42 L320/X46 L360/X52 L390/X56 L415/X60 L450/X65 L485/X70 PSL2 Hot rolling Normalizing, normalizing rolling Thermomechanical rolling Quenching and tempering L245R/BR, L290R/X42R L245N/BN, L290N/X42N, L320N/X46N, L360N/X52N, L390N/X56N, L415N/X60N L245M/BM, L290M/X42M, L320M/X46M, L360M/X52M, L390M/X56M, L415M/X60M, L450M/X65M, L485M/X70M, L555M/X80M, L625M/X90M, L690M/X100M, L830M/X120M L245Q/BQ, L290Q/X42Q, L320Q/X46Q, L360Q/X52Q, L390Q/X56Q, L415Q/X60Q, L450Q/X65Q, L485Q/X70Q, L555Q/X80Q

4 Ordering content

Contracts or orders ordered in accordance with this standard shall include the following information. a) the standard number; b) quality level; c) brand; d) specifications and thickness accuracy; e) delivery status; f) weight; g) edge state; h) the direction of the sample of the tensile, impact, and falling weight; i) Use (gas, oil, other fluids with similar requirements); j) Special requirements. 5 size, shape, weight 5.1 The size, shape, weight and tolerance of the steel plate shall comply with the provisions of GB/T 709. 5.2 According to the requirements of the purchaser, the steel plates of other sizes, shapes and tolerances may be negotiated by the supplier and the buyer and indicated in the contract.

6 Technical requirements

6.1 Chemical composition 6.1.1 The chemical composition (melting analysis and product analysis) of PSL1 steel plate shall comply with the requirements of Table 2. 6.1.2 The chemical composition (melting analysis and product analysis) of PSL2 steel plate shall comply with the requirements of Table 3. 6.1.3 When the thickness of the steel plate is greater than 25.0mm, the chemical composition may be determined by the supplier and the buyer. 6.1.4 The supplier may only provide smelting analysis and carbon equivalent based on smelting analysis, but should ensure that the product analysis requirements are met, if the user needs to For product analysis results, the two parties will negotiate separately. 6.1.5 According to the requirements of the purchaser, after negotiation between the supplier and the buyer and indicating in the contract, the supply of two consecutive grades between Table 2 or Table 3 may be provided. Middle grade. Its chemical composition shall be in accordance with the agreement and shall be in accordance with the provisions of Table 2 or Table 3. 6.1.6 For L290/X42 and higher steel grades, the elements listed in Table 2 or Table 3 (including niobium, vanadium, titanium) may be added after negotiation between the supplier and the purchaser. Other elements outside. Table 2 PSL1 chemical composition (melting analysis and product analysis) Brand Chemical composition a, g (mass fraction) /% Cb Mnb PSV Nb Ti no greater than L210/A 0.22 0.90 0.030 0.030 - - - L245/B 0.26 1.20 0.030 0.030 c,dc,dd L290/X42 0.26 1.30 0.030 0.030 ddd L320/X46 0.26 1.40 0.030 0.030 ddd L360/X52 0.26 1.40 0.030 0.030 ddd L390/X56 0.26 1.40 0.030 0.030 ddd L415/X60 0.26e 1.40e 0.030 0.030 fff L450/X65 0.26e 1.45e 0.030 0.030 fff L485/X70 0.26e 1.65e 0.030 0.030 fff a The maximum content of copper is 0.50%; the maximum content of nickel is 0.50%; the maximum content of chromium is 0.50%; the maximum content of molybdenum is 0.15%. b The carbon content is reduced by 0.01% for the specified maximum carbon content, and the manganese content is allowed to be 0.05% higher than the specified maximum manganese content, but for L245/B, L290/X42, For L320/X46 and L360/X52, the maximum manganese content should not exceed 1.65%; for L390/X56, L415/X60 and L450/X65, the maximum manganese content should be Not more than 1.75%; for L485/X70, the manganese content should not exceed 2.00%. c Unless otherwise agreed, the total content of antimony and vanadium shall not exceed 0.06%. d The total content of niobium, vanadium and titanium should not exceed 0.15%. e Unless otherwise agreed. f Unless otherwise agreed, the total content of antimony, vanadium and titanium shall not exceed 0.15%. g Unless otherwise specified, boron should not be intentionally added and the residual boron content should be no more than 0.001%. 6.2 Carbon equivalent of PSL2 steel 6.2.1 Carbon equivalents should be calculated as follows. a) When the carbon content is not more than 0.12%, the carbon equivalent CEpcm shall be calculated according to formula (1). CEPcm=C Si Mn Cu Cr Ni Mo 10 5B (1) If the smelting analysis result of B is less than 0.0005%, the B content can be regarded as zero when calculating CEpcm. b) When the carbon content is greater than 0.12%, the carbon equivalent CEIIW shall be calculated according to formula (2). CEIIW=C Mn Cr Mo V Cu Ni (2) 6.2.2 The carbon equivalent of each grade shall comply with the requirements of Table 3. Table 3 PSL2 chemical composition (melting analysis and product analysis) and carbon equivalent Brand Chemical composition (mass fraction) /%, not more than carbon equivalent a /%, not greater than Cb Si Mnb PSV Nb Ti Other CEIIW CEPcm L245R/BR 0.24 0.40 1.20 0.025 0.015 cc 0.04 e,k 0.43 0.25 L290R/X42R 0.24 0.40 1.20 0.025 0.015 0.06 0.05 0.04 e,k 0.43 0.25 L245N/BN 0.24 0.40 1.20 0.025 0.015 cc 0.04 e,k 0.43 0.25 L290N/X42N 0.24 0.40 1.20 0.025 0.015 0.06 0.05 0.04 e,k 0.43 0.25 L320N/X46N 0.24 0.40 1.40 0.025 0.015 0.07 0.05 0.04 d,e,k 0.43 0.25 L360N/X52N 0.24 0.45 1.40 0.025 0.015 0.10 0.05 0.04 d,e,k 0.43 0.25 L390N/X56N 0.24 0.45 1.40 0.025 0.015 0.10f 0.05 0.04 d,e,k 0.43 0.25 L415N/X60N 0.24f 0.45f 1.40f 0.025 0.015 0.10f 0.05f 0.04fg,h,k By agreement L245Q/BQ 0.18 0.45 1.40 0.025 0.015 0.05 0.05 0.04 e,k 0.43 0.25 L290Q/X42Q 0.18 0.45 1.40 0.025 0.015 0.05 0.05 0.04 e,k 0.43 0.25 L320Q/X46Q 0.18 0.45 1.40 0.025 0.015 0.05 0.05 0.04 e,k 0.43 0.25 L360Q/X52Q 0.18 0.45 1.50 0.025 0.015 0.05 0.05 0.04 e,k 0.43 0.25 L390Q/X56Q 0.18 0.45 1.50 0.025 0.015 0.07 0.05 0.04 d,e,k 0.43 0.25 L415Q/X60Q 0.18f 0.45f 1.70f 0.025 0.015 gggh,k 0.43 0.25 L450Q/X65Q 0.18f 0.45f 1.70f 0.025 0.015 gggh,k 0.43 0.25 L485Q/X70Q 0.18f 0.45f 1.80f 0.025 0.015 gggh,k 0.43 0.25 L555Q/X80Q 0.18f 0.45f 1.90f 0.025 0.015 gggi,j By agreement L245M/BM 0.22 0.45 1.20 0.025 0.015 0.05 0.05 0.04 e,k 0.43 0.25 L290M/X42M 0.22 0.45 1.30 0.025 0.015 0.05 0.05 0.04 e,k 0.43 0.25 L320M/X46M 0.22 0.45 1.30 0.025 0.015 0.05 0.05 0.04 e,k 0.43 0.25 L360M/X52M 0.22 0.45 1.40 0.025 0.015 ddde,k 0.43 0.25 L390M/X56M 0.22 0.45 1.40 0.025 0.015 ddde,k 0.43 0.25 L415M/X60M 0.12f 0.45f 1.60f 0.025 0.015 gggh,k 0.43 0.25 L450M/X65M 0.12f 0.45f 1.60f 0.025 0.015 gggh,k 0.43 0.25 L485M/X70M 0.12f 0.45f 1.70f 0.025 0.015 gggh,k 0.43 0.25 L555M/X80M 0.12f 0.45f 1.85f 0.025 0.015 gggi,k 0.43f 0.25 Table 3 (continued) Brand Chemical composition (mass fraction) /%, not more than carbon equivalent a /%, not greater than Cb Si Mnb PSV Nb Ti Other CEIIW CEPcm L625M/X90M 0.10 0.55f 2.10f 0.020 0.010 gggi,k L690M/X100M 0.10 0.55f 2.10f 0.020 0.010 gggi,j L830M/X120M 0.10 0.55f 2.10f 0.020 0.010 gggi,j 0.25 0.25 0.25 a When the carbon content is greater than 0.12%, CEIIW is applicable; when the carbon content is not more than 0.12%, CEPcm is applicable. b If the carbon content is reduced by 0.01% for the specified maximum carbon content, the manganese content is allowed to increase by 0.05% than the specified value, but for L245/B, L290/X42, L320/ For X46 and L360/X52, the maximum manganese content should not exceed 1.65%; for L390/X56, L415/X60 and L450/X65, the maximum manganese content should not exceed 1.75%; for L485/X70, L555/X80, the maximum manganese content should not exceed 2.00%; for L625/X90, L690/X100 and L830/X120, The maximum manganese content should not exceed 2.20%. c Unless otherwise agreed, the total content of antimony and vanadium shall not exceed 0.06%. d The total content of niobium, vanadium and titanium should not exceed 0.15%. e Unless otherwise agreed, the maximum copper content is 0.50%; the maximum nickel content is 0.30%; the maximum chromium content is 0.30%; the maximum content of molybdenum is 0.15%. f Unless otherwise agreed. g Unless otherwise agreed, the total content of antimony, vanadium and titanium shall not exceed 0.15%. h Unless otherwise agreed, the maximum copper content is 0.50%; the maximum nickel content is 0.50%; the maximum chromium content is 0.50%; the maximum content of molybdenum is 0.50%. i Unless otherwise agreed, the maximum copper content is 0.50%; the maximum nickel content is 1.00%; the maximum chromium content is 0.50%; the maximum content of molybdenum is 0.50%. j The boron content is not more than 0.004%. k Unless otherwise agreed, boron should not be intentionally added and the residual boron content should be no more than 0.001%. 6.3 Smelting method Steel should be smelted in an oxygen converter or an electric furnace. PSL2 quality grade steel, should be refined outside the furnace, for L485/X70 and higher strength steel grade It should be degassed by vacuum. Unless the buyer has special requirements, the smelting method is chosen by the supplier. 6.4 Delivery status The steel plate shall be delivered in hot rolling, normalizing, normalizing rolling, thermomechanical rolling, quenching and tempering. 6.5 Mechanical and process properties 6.5.1 Mechanical and process performance for intermediate grades between two consecutive grades with a specified total elongation strength higher than L290/X42 Determined by the supply and demand sides. 6.5.2 The mechanical and process properties of PSL1 steel plates are to comply with the requirements of Table 4. Table 4 Mechanical and process properties of PSL1 steel plate Steel grade Tensile test a, b Specifies the total extension strength Rt0.5/MPa not less than Tensile strength Rm/MPa not less than Elongation after break c/% not less than A50mm A 180° bending test (a-sample thickness D-bending head diameter) L210/A 210 335 L245/B 245 415 L290/X42 29......
Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21237-2018_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21237-2018_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 21237-2018_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21237-2018_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. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 21237-2018?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21237-2018 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.