GB/T 43852-2024
Steel reinforced plastic composite pressure pipe for hot and cold water (English Version)
- Standard No.
- GB/T 43852-2024
- Language
- Chinese, Available in English version
- Release Date
- 2024
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China CN / GB
- Latest
- GB/T 43852-2024
- Introduction
Interpretation of the core content of the standard
This standard systematically specifies the technical requirements of steel reinforced plastic composite pressure pipe (PSP) for the first time, filling the gap in domestic and foreign standards in this field. The product adopts a three-layer composite structure: the inner and outer layers are PE/PP-R plastics, and the middle layer is a welded steel pipe, which is composited by hot-melt adhesives.
Product Classification System
Type Plastic Layer Material Metal Layer Material Maximum Operating Temperature Typical Applications PSP-I Polyethylene (PE) Electro-galvanized/Tin Steel Strip 40℃ Cold Water System PSP-II Polypropylene (PP-R) Electro-galvanized/Tin Steel Strip 95℃ Hot Water/Heating PSP-III Polypropylene (PP-R) Stainless steel strip 95℃ High temperature heat dissipation system Key technical requirements
Material performance indicators
- Steel strip layer: Elongation after break of electro-galvanized steel strip ≥30%, stainless steel strip ≥22%
- Hot melt adhesive: T peel strength ≥100N/25mm, oxidation induction time ≥20min
- Plastic layer: PE must meet PE80 grade, PP-R should meet the requirements of GB/T 18742.1
Physical and mechanical properties
Test items Technical requirements Test methods Burst strength ≥4×PN GB/T 15560 High temperature peel strength ≥25N/25mm Appendix A Hydrostatic pressure resistance (95℃) 2×PN/165h no leakage GB/T 6111 Connection technical specifications
Dual hot melt connection system
The standard specifies two hot melt connection methods:
- Dual hot melt of hot melt machine: meets the requirements of CJ/T 237-2006
- Dual hot melt of electromagnetic machine: meets the requirements of QB/T 5634-2021 (not applicable to austenitic stainless steel PSP-III)
Safety factor design
The connection system needs to consider the ratio of the axial tensile force of the plastic layer to the hydraulic thrust:
- Series A: Safety factor 1.0 (basic requirement)
- Series B: Safety factor 2.0 (high safety requirement)
Implementation suggestions
Selection guide
Application scenario Recommended type Working pressure Precautions Building cold water PSP-I ≤2.5MPa Avoid direct sunlight Floor heating system PSP-II ≤2.0MPa Use condition level 4 High temperature heating PSP-III ≤2.0MPa Use condition level 5
Construction points
- Remove burrs from the pipe end after cutting to ensure a smooth connection surface
- Strictly control the heating temperature during hot melt connection (PP-R: 260±10℃, PE: 220±10℃)
- System pressure test should be carried out in stages, and the final pressure should be ≥1.5 times the working pressure
Standard Innovation
- The first bonding interface test method: New high-temperature peel strength (70℃) and hot and cold stress cycle tests
- Enhanced long-term performance: 1000h hydrostatic pressure resistance test and MFR change rate ≤20% are required
- Safety classification: Different safety level products are distinguished by A/B series
GB/T 43852-2024 Referenced Document
- GB/T 10125 Corrosion tests in artificial atmospheres—Salt spray tests
- GB/T 1033.1 Plastics.Methods for determining density of non-celluar plastics.Part1:Immersion method,liquid pyknometer method and titration method
- GB/T 13663.1 Polyethylene(PE) piping systems for water supply.Part 1:General
- GB/T 15560-1995 Standard test method for short-time hydraulic failure and resistance to constant internal pressure of the plastics pipes for the transport of fluids
- GB/T 15675-2020 Continuously electrolytically zinc/zinc-nickel alloy coated steel sheet and strip
- GB/T 17219 Health and Safety Evaluation of Water Supply Equipment, Protective Materials, and Water Treatment Materials for Drinking Water*， 2025-08-29 Update
- GB/T 18742.1 Polypropylene (PP) piping systems for hot and cold water installations—Part 1: General
- GB/T 18991 Thermoplastics pipes and fittings for hot and cold water systems
- GB/T 19278-2018 General terms and their definitions of thermoplastic pipes, fittings and valves
- GB/T 19466.3 Plastics - Differential scanning calorimetry (DSC) - Part 3: Determination of melting and crystallization temperatures and enthalpy*， 2025-12-02 Update
- GB/T 19466.6 Plastics.Differential scanning calorimetry(DSC).Part 6:Determination of oxidation induction time(isothermal OIT) and oxidation induction temperature (dynamic OIT)
- GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1: Method of test at room temperature
- GB/T 242 Metal materials.Tube.Drift-expending test
- GB/T 2520-2017 Cold-reduced electrolytic tinplate
- GB/T 2791 Adhesives, T peel strength test method for a flexible-to-flexible test specimen assembly
- GB/T 2828.1 Inspection procedure by count sampling part 1: Lot by lot inspection sampling plan retrieved by acceptance quality limit (AQL)
- GB/T 2918 Standard environment for conditioning and testing of plastic specimens
- GB/T 3280-2015 Cold rolled stainless steel plate, sheet and strip
- GB/T 3682.1 Plastics—Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics—Part 1:Standard method
- GB/T 6111 Thermoplastics piping systems for the conveyance of fluids.Determination of the resistance to internal pressure
- GB/T 6461 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates--Rating of test specimens and manufactured articles subjected to corrosion tests
- GB/T 8806 Plastics piping systems.Plastics components.Determination of dimensions
GB/T 43852-2024 history
- 2024 GB/T 43852-2024 Steel reinforced plastic composite pressure pipe for hot and cold water
