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GB/T 46437-2025Plastic-dipped composite steel pipes for industrial piping (English PDF)

工业管道用浸塑复合钢管

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 31, 2025

Implementation date

May 1, 2026

Scope

GB/T 46437-2025 is the English-translated version of 工业管道用浸塑复合钢管.

GB/T 46437-2025 is the Chinese standard "Plastic-dipped composite steel pipes for industrial piping".

Its scope clause reads: 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. Its clauses include terms and definitions.

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Document preview — GB/T 46437-2025

National Standard of the People's Republic of China

ICS: 77.140.75
Classification: H 48

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Classification and Codes
5.Order Details
6.Manufacturing Process
7 Technical Requirements
8.Test methods 9.
9.Inspection Rule
10 Packaging, marking, quality certificate, transportation and storage
Appendix B (Informative) Corrosion Resistance of Plastic-Coated Composite Steel Pipes and Fittings
Appendix C (Normative) Plastic-coated Elbow
Appendix D (Normative) PVC-coated Tee
Appendix E (Normative) Plastic-coated reducers
Appendix F (Normative) Dip-coated Cleaning Ring
Appendix G (Normative) Dimensions and Shapes of Dip-Coated Adjustment Pads
Appendix H (Normative) High Temperature Resistance Test Method
Appendix I (Normative) Low Temperature Resistance Test Method
Appendix J (Normative) Negative Pressure Test Method
Appendix K (Normative) Method for Determining Shear Strength

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.

GB/T 47090 | GB/T 43105 | GB/T 40316 | GB/T 12772 | GB/T 46439 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 32 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 46437

Edition	Title	Revision	Status
GB/T 46437-2025	Plastic-dipped composite steel pipes for industrial piping	current edition	Current

This page sells the current edition, GB/T 46437-2025. Earlier editions are listed for reference only.

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