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GB/T 46439-2025: Seamless stainless steel pipes for hydrogen powered vehicle piping
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 46439-2025	English	359	Add to Cart	4 days [Need to translate]	Seamless stainless steel pipes for hydrogen powered vehicle piping

GB/T 46439-2025: Seamless stainless steel pipes for hydrogen powered vehicle piping

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National Standards of the People's Republic of China ICS 77.140.75CCS H 48 Seamless stainless steel pipes for hydrogen fuel cell vehicle piping Released on October 31, 2025 Implemented on 2026-05-01 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 2 4.Classification and Codes 2 5.Order Details 2 6.Manufacturing Process 2 7 Technical Requirements 3 8.Test Methods 7. 9 Inspection Rules 9 10.Packaging, labeling, and quality certificate.

Foreword

This document conforms to GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting is scheduled. 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/TC 183). This document was drafted by. Ma'anshan Zunma Technology Co., Ltd., Zhejiang Jiuli Special Materials Technology Co., Ltd., and Taizhou Huadi Materials Technology Co., Ltd. Limited Liability Company, Jiangsu Wujin Stainless Steel Co., Ltd., Steel Research Nake Testing Technology Co., Ltd., Zhejiang Yongshang Special Materials Co., Ltd. Jiangyin Nanfang Stainless Steel Pipe Co., Ltd., Zhonggang Stainless Steel Pipe Industry Technology Shanxi Co., Ltd., Zhejiang Zhongda New Material Co., Ltd., Steel China Railway Research Institute Co., Ltd., Shanghai Shunhua New Energy System Co., Ltd., Kangzeng Special Materials Group Co., Ltd., and Shanxi Taiyuan Iron & Steel Stainless Steel Pipe Co., Ltd. Limited Liability Company, Shanghai Shenzhou Sunshine Special Steel Pipe Co., Ltd., Shengdexintai New Material Co., Ltd., Changshu Huaxin Special Steel Co., Ltd. Heruimai Materials Technology (Jiangsu) Co., Ltd., Qingshan Steel Pipe Co., Ltd., Fujian Qingtuo Special Steel Technology Research Co., Ltd., Yapp Automotive Parts Joint-stock company, Changzhou Shenneng Metal Products Co., Ltd., Guangdong Zhida Precision Tube Manufacturing Co., Ltd., Metallurgical Industry Information Standard Quasi-research institute, Jiangsu Hechi Special Materials Co., Ltd. The main drafters of this document are. Zhang Jian, Wang Jianpo, Gu Chengjie, Sun Wenqiang, Wang Raoyang, Lu Bin, Luo Jing, Fang Dewei, Qian Hangyu, and Wu Lihua. Huang Zhenxuan, Feng Han, Zheng Hongda, Bai Junfeng, Zhang Peili, Zhou Wenqing, Qin Lijun, Luo Jian, Cao Xinming, Jiang Laizhu, Zhang Sheng, Xu Ke, Gu Hua, Gao Liang Luo Lixin, Li Qi, Zheng Zizhuang, Wang Shaobing, Wang Jueguang, Zhu Xiaobin, Li Zimo, Zhang Guangjin, Xue Jianjun, Wei Xiaojin, He Xikou, Niu Bo, Shi Feifei Wen Dehong, Liu Yi, Gao Dejun, Gao Liming, Jiang Limei, Xing Bowen, Xue Jianzhong, Chen Yun. Seamless stainless steel pipes for hydrogen fuel cell vehicle piping

1 Scope

This document specifies the classification, designation, ordering details, manufacturing process, technical requirements, and testing procedures for stainless steel seamless pipes used in hydrogen fuel cell vehicle pipelines. Testing methods, inspection rules, packaging, marking and quality certificates. This document applies to hydrogen gas with compressed hydrogen as the working medium, a rated working pressure not exceeding 70 MPa, and a medium temperature of -40℃ to 85℃. Seamless stainless steel pipes for pipelines in new energy vehicles (passenger cars, buses, trucks and other road vehicles) (hereinafter referred to as "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 listed below. 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 Finished Steel and Alloy Products GB/T 223.11 Determination of Chromium Content in Iron and Steel and Alloys - Visual Titration or Potentiometric Titration GB/T 223.25 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Nickel Content by Gravimetric Method of Dimethylglyoxime GB/T 223.28 Chemical Analysis Methods for Iron and Steel and Alloys—Determination of Molybdenum by the α-benzoic acid oxime Gravimetric Method GB/T 223.36 Chemical Analysis Methods for Iron and Steel Alloys - Determination of Nitrogen Content by Distillation Separation-Neutralization Titration 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 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 223.82 Determination of Hydrogen Content in Iron and Steel - Inert Gas Fusion-Thermal Conductivity or Infrared 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 241 Hydraulic test method for metallic tubes GB/T 242 Test method for flaring of metal pipes GB/T 246 Test method for flattening of metallic tubes GB/T 1031 Product Geometric Specification (GPS) - Surface Roughness Parameters and Their Values Using the Surface Structure Profile Method GB/T 2102 Acceptance, Packaging, Marking and Quality Certificate of Steel Pipes GB/T 2423.17 Environmental testing – Part 2.Test methods – Test Ka. Salt spray GB/T 2975 Sampling Location and Specimen Preparation for Mechanical Property Testing of Steel and Steel Products GB/T 4334-2020 Corrosion of Metals and Alloys—Intergranular Corrosion Testing of Austenitic and Ferritic-Austenitic (Duplex) Stainless Steel method GB/T 5777 Automatic full-circumferential ultrasonic testing of longitudinal and/or transverse defects in seamless and welded (excluding submerged arc welded) steel pipes GB/T 6394 Method for Determination of Average Grain Size of Metals GB/T 7735 Automatic eddy current testing for defects in seamless and welded (excluding submerged arc welded) steel pipes GB/T 10561-2023 Standard rating chart microscopic examination method for the determination of non-metallic inclusion content in steel GB/T 11170 Determination of Multi-Element Content in Stainless Steel by Spark Discharge Atomic Emission Spectrometry (Conventional Method) ...