GB/T 45357-2025 in English
VALIDPlastics piping systems on ships—Polyethylene（PE）pipes and fittings
- Issued on:2025-02-28
- Implemented on:2025-09-01
- File Format:PDF
- Delivery:Via email within 8 business days
$641.00
| Standard No: | GB/T 45357-2025 |
| Document status: | VALID |
| Title in English: | Plastics piping systems on ships—Polyethylene（PE）pipes and fittings |
| Title in Chinese: | 船用塑料管道系统 聚乙烯（PE）管材及管件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 8 business days |
| Issued on: | 2025-02-28 |
| Implemented on: | 2025-09-01 |
| Chinese Classification: | G33-Plastic profile |
| Professional Classification: | GB-National Standard |
| Related Keywords: | ships polyethylene（pe）pipes
fittings introduction interpretation electric fusion fittings saddle fittings fittings |
| Related Topics: | pipe
Pipe Fittings Pipe Fittings Pipes and Fittings |
《GB/T 45357-2025船用塑料管道系统 聚乙烯（PE）管材及管件》由TC48（全国塑料制品标准化技术委员会）归口，TC48SC3（全国塑料制品标准化技术委员会塑料管材、管件及阀门分会）执行，主管部门为中国轻工业联合会。
Introduction
Interpretation of the core content of the standard
This standard specifies the technical indicators of pipes and fittings made of PE100 grade and above mixed materials for special working conditions of ships. Compared with the IMO A.753(18) international standard, new ship-specific test requirements such as resistance to external pressure and flame spread are added.
Comparison of key technical indicators
| Project | Pipe requirements | Fitting requirements | Test method |
|---|---|---|---|
| Hydrostatic strength | 80℃/165h no leakage | Same as pipe requirements | GB/T 6111 |
| Carbon black dispersion | ≤Level 3 | Same as pipe requirements | GB/T 18251 |
| Slow crack resistance | Notch test passed for 500h | - | GB/T 18476 |
Typical application scenario
The ballast water system of a cruise ship uses PE100 SDR11 pipes. The maximum working pressure at 50℃ is 0.81MPa as determined by the temperature-pressure conversion table in Appendix A, which meets the requirement of 1.6 times the safety factor. Special attention should be paid to the resistance deviation of the electric fusion fittings ≤10% during installation.
Implementation recommendations
- Material selection: Black PE100 compound must be used, and the carbon black content is strictly controlled at 2.0%-2.5%
- Dimension control: The out-of-roundness of the pipe is classified according to Table 4, such as dn315mm straight pipe ≤11.1mm
- System verification: Products from different manufacturers need to be tested for welding compatibility according to Chapter 6.5
Technology evolution analysis
Compared with GB/T 13663 series standards, the following are added:
1. Connection clauses for classification society certification (8.1.1.4)
2. Special test methods for electric fusion saddle fittings (Appendix B)
3. Fatigue test requirements under dynamic load (7.20)
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