GB/T 5312-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 5312-2025	539	Add to Cart	5 days	Seamless steel tubes and pipes for ship	Valid
GB/T 5312-2009	85	Add to Cart	Auto, < 3 mins	Carbon and carbon-manganese steel seamless steel tubes and pipes for ship	Valid
GB/T 5312-1999	519	Add to Cart	4 days	Carbon and carbon--Manganese steel seamless steel tubes and pipes for ship	Obsolete
GB/T 5312-1985	RFQ	ASK	3 days	Carbon steel seamless steel tubes for ship	Obsolete

Similar standards

GB/T 5312   GB/T 5310   GB 6479   GB/T 5312   GB/T 5310   GB/T 3091   

Basic data

Standard ID: GB/T 5312-2025 (GB/T5312-2025)
Description (Translated English): Seamless steel tubes and pipes for ship
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H48
Classification of International Standard: 77.140.75
Word Count Estimation: 27,260
Date of Issue: 2025-08-29
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 5312-2009, GB/T 31928-2015
Issuing agency(ies): State Administration for Market Regulation; Standardization Administration of China

GB/T 5312-2025: Seamless steel tubes and pipes for ship

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ICS 77.140.75 CCSH48 National Standards of the People's Republic of China Replaces GB/T 5312-2009 and GB/T 31928-2015 Seamless steel pipes for ships Published on 2025-08-29 Implemented on 2026-03-01 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of Contents

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions, Symbols 2 4.Classification and Codes 2 5.Order details 3 6 Manufacturing process 4 7 Technical Requirements 5 8 Sample 17 9.Test Methods 17 10 Inspection Rule 18 11 Packaging, labeling, and quality certificates 18 Appendix A (Informative) Special Requirements for Ordering 19 Appendix B (Informative) High Temperature Specified Plastic Tensile Strength 20 References 21

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB/T 5312-2009 Seamless Carbon Steel and Carbon Manganese Steel Tubes for Shipbuilding and GB/T 31928-2015 Stainless Steel Tubes for Shipbuilding. Seamless steel pipes. This document is based on GB/T 5312-2009, and integrates the content of GB/T 31928-2015. Compared with GB/T 31928-2015, apart from structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application has been changed (see Chapter 1 of GB/T 5312-2009 and GB/T 31928-2015); b) Added terms and definitions (see Chapter 3); c) The manufacturing method code has been changed (see 4.2, 3.1 of GB/T 5312-2009); d) The order details have been changed (see Chapter 5, Chapter 4 of GB/T 5312-2009 and GB/T 31928-2015); e) Added steel grades and corresponding technical requirements (see Tables 2-5); f) The density of stainless steel was changed (see Table 2, Table 5 of GB/T 31928-2015); g) The hydraulic test requirements and allowable stresses have been changed (see 7.3, 6.5 of GB/T 5312-2009 and GB/T 31928-2015). 6.5); h) The bending test requirements have been changed (see 7.4.2, 6.6.2 of GB/T 5312-2009 and 6.6.2 of GB/T 31928-2015); i) The requirements for pitting corrosion testing have been changed (see 7.6, 6.8 of GB/T 31928-2015); j) Surface quality requirements have been changed (see 7.8, 6.7 of GB/T 5312-2009 and 6.10 of GB/T 31928-2015); k) Dimensional tolerances have been changed (see Tables 8 and 9, Table 2 of GB/T 5312-2009 and Table 2 of GB/T 31928-2015). Table 3); l) A new chapter on "Samples" has been added (see Chapter 8); m) The sampling quantity has been changed (see Table 10, Table 7 of GB/T 5312-2009 and Table 6 of GB/T 31928-2015); n) The batching rules have been changed (see 10.2, 8.2 of GB/T 5312-2009 and 8.2 of GB/T 31928-2015). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Iron and Steel Association. This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This document was drafted by. Baoshan Iron & Steel Co., Ltd., Zhejiang Jiuli Special Materials Technology Co., Ltd., and Hengyang Valin Steel Pipe Co., Ltd. Company, Chengde Jianlong Special Steel Co., Ltd., Shengdexintai New Materials Co., Ltd., Steel Research Nake Testing Technology Co., Ltd., Baoyin Special Steel Materials Technology Co., Ltd., Zhejiang Bosheng Steel Industry Group Co., Ltd., Jiangyin Nanfang Stainless Steel Pipe Co., Ltd., Zhonggang Stainless Steel Pipe Industry Co., Ltd. Shanxi Technology Co., Ltd., Zhejiang Dewei Stainless Steel Pipe Industry Co., Ltd., Zhejiang Jinxin Stainless Steel Manufacturing Co., Ltd., Jiangsu Wujin Stainless Steel Co., Ltd. Co., Ltd., China Iron & Steel Research Institute Co., Ltd., Zhejiang Zhongda New Materials Co., Ltd., ZTE Energy Equipment Co., Ltd., Shangshang Desheng Group Co., Ltd., Shanxi Taigang Stainless Steel Pipe Co., Ltd., Zhejiang Huatian Special Materials Co., Ltd., Qingshan Steel Pipe Co., Ltd., Zhejiang Yongshang Special Materials Co., Ltd., China Classification Society, Pengye Holding Group Co., Ltd., Changzhou Changbao Precision Steel Pipe Co., Ltd., Taiyuan Zhongjintian Weihai Stainless Steel Pipe Co., Ltd., Zhejiang Zhuoye Energy Equipment Co., Ltd., Fujian Qingtuo Special Steel Technology Research Co., Ltd., Jiangsu Xinchangjiang Seamless Steel Pipe Manufacturing Co., Ltd., Suzhou Huachuang Special Materials Co., Ltd., Jiangsu Yinhuan Precision Steel Pipe Co., Ltd., Jiangsu Jieda Special New Materials Co., Ltd. Materials Co., Ltd., Zhejiang Chuangyue Metal Materials Co., Ltd., Metallurgical Industry Information and Standards Research Institute, Jiaxing Jinjia Shipbuilding Co., Ltd. Limited Company, China Merchants Jinling Dingheng Shipbuilding (Yangzhou) Co., Ltd. The main drafters of this document are. Xu Qing, Dai Wei, Shao Yu, Peng Yang, Liu Yuwei, Zhou Wenqing, Liu Chunhui, Luo Jing, Zhuang Zhuojun, Wang Chaosheng, and Xue Jianjun. Wang Ruisen, Shen Li, Fan Changjiang, Lu Hongping, Bao Hansheng, Chen Xiaofu, Qiu Yunlong, Ji Xuewen, Han Zijian, Cheng Jianchi, Chen Tao, Zhang Ting, Pan Zhangren, Zhong Chao, Zhao Ze, Lin Rihe, Jiang Laizhu, Yin Xianli, Wu Kaichuan, Liu Yu, Xue Jianliang, Cheng Dongyue, Li Qi, Lu Haijun, Yu Anhua, Liu Jilin, Zhang Libin Li Ziming, Wu Qingsong, Xu Lexie, Qian Hangyu, Cao Yuxin, Feng Jiamin, Lou Zhen, Gao Jiangjun, Feng Han, Zhu Weifei, Qiao Xiaojun, Cao Xinming, Lei Zhishen Li Jigang, Chen Chen, Jiang Chengyang, Liu Liang, Lu Dajun, Shao Qi, Luo Suzhen, Peng Xianming, Wu Lihua, Wang Xiaobing, Li Zhao, Huang Wujun, Wang Wei, Li Zhigang Chen Weiguang, Xue Jianzhong, Zou Jianxin, Liu Cong. The document replaced by this document has been released in the following versions. ---GB/T 5312, first published in 1985, first revised in.1999, and second revised in.2009; ---GB/T 31928, first published in.2015. Seamless steel pipes for ships 1.Scope This document specifies the classification, designation, ordering details, manufacturing process, technical requirements, inspection rules, packaging, and marking of seamless steel pipes for marine applications. The quality certificate describes the corresponding test methods. This document applies to seamless steel pipes made of carbon steel, carbon manganese steel, alloy steel, and stainless steel (hereinafter referred to as seamless steel pipes) used in the manufacture of marine pressure piping systems, boilers, and superheaters. (Referring to steel pipes).

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 222 Permissible Deviations in Chemical Composition of Steel and Alloy Finished Products GB/T 223.9 Determination of Aluminum Content in Iron and Steel and Alloys - Chromium Blue S Spectrophotometric Method GB/T 223.11 Determination of Chromium Content in Iron and Steel and Alloys - Visual Titration or Potentiometric Titration GB/T 223.12 Chemical Analysis Methods for Iron and Steel Alloys - Sodium Carbonate Separation-Diphenylcarbazide Spectrophotometric Determination of Chromium GB/T 223.18 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Copper by Sodium Thiosulfate Separation-Iodometric Method GB/T 223.23 Determination of Nickel Content in Iron and Steel and Alloys - Dimethylglyoxime Spectrophotometric Method GB/T 223.25 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Nickel Content by Gravimetric Method of Dimethylglyoxime GB/T 223.26 Determination of molybdenum content in iron and steel and their alloys - Thiocyanate spectrophotometric method GB/T 223.28 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Molybdenum by α-Benzoxime Gravimetric Method GB/T 223.36 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Nitrogen by Distillation Separation-Neutralization Titration GB/T 223.40 Determination of Niobium Content in Iron and Steel and Alloys - Chlorsulfonylphenol S Spectrophotometric Method GB/T 223.50 Chemical Analysis Methods for Iron and Steel and Alloys - Determination of Phenylacetone-Cetyltrimethylamine Bromide by Direct Spectrophotometric Method Tin quantity GB/T 223.53 Chemical Analysis Methods for Iron and Steel Alloys—Determination of Copper Content by Flame Atomic Absorption Spectrophotometry GB/T 223.59 Determination of phosphorus content in iron and steel and their alloys - Bismuth-phosphomolybdenum blue spectrophotometric method and antimony-phosphomolybdenum blue spectrophotometric method GB/T 223.60 Determination of silicon content in iron and steel and their alloys by gravimetric method GB/T 223.63 Determination of Manganese Content in Iron and Steel and Alloys - Sodium (Potassium) Periodate Spectrophotometric Method GB/T 223.84 Determination of Titanium Content in Iron and Steel and Alloys - Diantipyrine Methane Spectrophotometric Method GB/T 223.85 Determination of sulfur content in iron and steel and their alloys by infrared absorption method after combustion in an induction furnace GB/T 223.86 Determination of total carbon content in iron and steel and their alloys by infrared absorption method after combustion in an induction furnace GB/T 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature GB/T 229 Metallic materials Charpy impact test method GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1.Test method GB/T 231.1 Metallic materials – Brinell hardness test – Part 1.Test method GB/T 232 Metallic Materials - Bending Test Method GB/T 241 Hydraulic test method for metallic tubes ......

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