GB/T 40967-2021 in English
VALIDPolyethylene(PE)pipes and fittings for nuclear power plants
- Issued on:2021-11-26
- Implemented on:2022-06-01
- File Format:PDF
- Delivery:Via email within 5 business days
$582.00
《GB/T 40967-2021核电厂用聚乙烯（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
Analysis of the core content of the standard
Material performance requirements
The standard stipulates that polyethylene compounding materials must meet the following requirements:
- Density range 956kg/m³~968kg/m³
- Melt mass flow rate (MFR) 190℃/5kg is 0.15g/10min~1.0g/10min
- Carbon black content 2.0%~2.5% (mass fraction)
- Oxidation induction temperature>220℃ (10℃/min heating rate)
Dimension Specification Comparison
| Series | Nominal Size Range | Wall Thickness Tolerance | Out-of-roundness Requirements |
|---|---|---|---|
| IPS Series | DN1/2in~54in | ≤12%en | 0.015×dem |
| Metric Series | dn16mm~1600mm | ≤12%en | 0.015×dem |
Physical and mechanical properties test
Key test items include:
- 80℃/200h hydrostatic test (ring stress 5.17MPa)
- Short-term pressure test (ring stress 22.07MPa at 23℃ for 5s)
- Fusion compatibility verification (butt fusion tensile strength ≥25MPa)
Technical evolution of standards
This standard innovatively introduces:
- Dual size system (IPS/metric) compatible design
- Special provisions for nuclear safety-grade pipelines (DF≤0.5)
- Pressure calculation method for welded fittings (Appendix C)
- HDS parameter table for operating temperature 0℃~60℃ (Appendix A)
Implementation suggestions
Note when applying:
- Nuclear safety-grade pipelines should be verified for system suitability separately
- Storage of electric fusion pipe fittings should avoid resistance drift
- The cutting angle θ of welded elbows should be ≤11.25°
- Fusion process assessment is required before installation
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