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GB/T 46437-2025: Plastic-dipped composite steel pipes for industrial piping
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 46437-2025	English	699	Add to Cart	5 days [Need to translate]	Plastic-dipped composite steel pipes for industrial piping

GB/T 46437-2025: Plastic-dipped composite steel pipes for industrial piping

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ICS 77.140.75 CCSH48 National Standards of the People's Republic of China Plastic-coated composite steel pipes for industrial pipelines Published on 2025-10-31 Implemented on May 1, 2026 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 1 4.Classification and Codes 2 5.Order Details 2 6.Manufacturing Process 2 7 Technical Requirements 3 8.Test methods 9. 9.Inspection Rule 11 10 Packaging, marking, quality certificate, transportation and storage 12 Appendix A (Informative) Recommended allowable pressure, maximum allowable temperature, and minimum allowable temperature for PVC-coated pipes and fittings 13 Appendix B (Informative) Corrosion Resistance of Plastic-Coated Composite Steel Pipes and Fittings 14 Appendix C (Normative) Plastic-coated Elbow 16 Appendix D (Normative) PVC-coated Tee 17 Appendix E (Normative) Plastic-coated reducers 19 Appendix F (Normative) Dip-coated Cleaning Ring 21 Appendix G (Normative) Dimensions and Shapes of Dip-Coated Adjustment Pads 23 Appendix H (Normative) High Temperature Resistance Test Method 25 Appendix I (Normative) Low Temperature Resistance Test Method 26 Appendix J (Normative) Negative Pressure Test Method 27 Appendix K (Normative) Method for Determining Shear Strength 28

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. Please note that the content of 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. Shandong Shanghe Power Technology Co., Ltd., China Petroleum Materials Co., Ltd., Shandong Nuclear Power Co., Ltd., and Zhejiang Jinhua Power Co., Ltd. Zhou Pipeline Industry Co., Ltd., Shandong Shanghe New Material Technology Co., Ltd., State Nuclear Power Demonstration Power Plant Co., Ltd., Shandong Electric Power Engineering Consulting Institute Co., Ltd., China Nuclear Industry No. 23 Construction Co., Ltd., Handan Zhengda Pipe Group Co., Ltd., Qinghai Huahui Haohang Pipe Industry Technology Co., Ltd. Limited Liability Company, Metallurgical Industry Information and Standards Research Institute. The main drafters of this document are. Zhang Ran, Zhai Guixin, Liu Fei, Yu Binjie, Li Ying, Cao Feng, Song Xupeng, Ma Yuwei, Zhang Hongshun, Wang Xiaoling, and Li Qi. Tian Juan, He Chi, Wu Aimin, Shi Wenhua, Xu Yaqian, Ling Yanrui, Yang Zhen, Xi Jinhui, Wang Yuanzhi, Liu Jianxiang, Zhang Xianglong, Wang Xin, Liu Xiaobao, Guo Yong, Liu Tong, Zheng Xinwen, Ma Shishuai, Xue Jianzhong. Plastic-coated composite steel pipes for industrial pipelines

1 Scope

This document specifies the classification and designation, ordering details, manufacturing process, technical requirements, and testing procedures for plastic-coated composite steel pipes and fittings used in industrial pipelines. Methods, inspection rules, packaging, marking, quality certificate, transportation and storage. This document applies to plastic-coated composite steel pipes (hereinafter referred to as plastic-coated pipes) used in pipelines in industries such as nuclear power, thermal power, chemical, pharmaceutical, municipal, and shipbuilding. And pipe fittings.

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 241 Hydraulic test method for metal tubes GB/T 2102 Acceptance, Packaging, Marking and Quality Certificate of Steel Pipes GB/T 3091 Welded steel pipes for low-pressure fluid transportation GB/T 4956 Measurement of Non-Magnetic Coating Thickness on Magnetic Substrates - Magnetic Method GB/T 8163 Seamless steel pipes for conveying fluids GB/T 8923.1 Visual assessment of surface cleanliness of steel before coating - Part 1.Uncoated steel Rust level and treatment level of the surface and the steel surface after complete removal of the original coating. GB/T 9124.1 Steel pipe flanges - Part 1.PN series GB/T 9124.2 Steel pipe flanges - Part 2.Class series GB/T 11115 Polyethylene (PE) Resin GB/T 11547 Determination of the resistance of plastics to liquid chemical reagents GB/T 12459 Types and parameters of steel butt-welded pipe fittings GB/T 12670 Polypropylene (PP) Resin GB/T 13401 Technical Specification for Steel Butt-Welded Pipe Fittings GB/T 28897 Steel-plastic composite pipes and fittings for fluid transportation GB/T 50726 Technical Standard for Corrosion Protection Engineering of Industrial Equipment and Pipelines

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 baseassembly Steel pipes, pipe fittings, flanges, or combinations thereof. 3.2 plastic-dipped A composite process that allows plastic powder to adhere evenly to the heated substrate (3.1) surface and has a certain shear strength and thickness. ...