GB/T 41422-2022 in English
VALIDOriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure
- Issued on:2022-04-15
- Implemented on:2022-11-01
- File Format:PDF
- Delivery:Via email within 5 business days
$476.00
| Standard No: | GB/T 41422-2022 |
| Document status: | VALID |
| Title in English: | Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure |
| Title in Chinese: | 压力输水用取向硬聚氯乙烯(PVC-O)管材和连接件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2022-04-15 |
| Implemented on: | 2022-11-01 |
| ICS Classification: | 83.140.30-Plastics pipes, fittings and valves |
| Chinese Classification: | G33-Plastic profile |
| Professional Classification: | GB-National Standard |
| Related Keywords: | water pressure
test pressure 168-hour gradient pressure test pressure introduction core material performance analysis material grade design sudden pressure process |
| Related Topics: | orientation
Rigid PVC for water wells orientation connection water delivery Rigid PVC material orientation GBT41422 GB/T 41422-2022 pipe |
《GB/T 41422-2022压力输水用取向硬聚氯乙烯(PVC-O)管材和连接件》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
Core material performance analysis
Material grade design: 5 MRS grading systems (315-500MPa) correspond to different application scenarios. PVC-O400 represents the minimum required strength of 40MPa, matching the transportation needs of the water supply network.
| Material Grade | MRS(MPa) | Applicable Working Pressure |
|---|---|---|
| PVC-O315 | 31.5 | ≤1.6MPa |
| PVC-O450 | 45 | 2.0-2.5MPa |
Key Dimension Technical Specifications
The wall thickness tolerance is strictly controlled within +12%~-0%. Taking φ355 pipe as an example: the ring stiffness sR value must be ≥29.7kN/m² to match the mechanical load requirements for underground burial.
Overpressure application case: DN630 pipe passed the 168-hour gradient pressure test at 1.25PN test pressure, and showed a characteristic fracture mode during the sudden pressure process.
Full life cycle test system
System verification includes 3 levels of test protocols:
- Accelerated aging test (2000hr@60°C) predicts 50-year limit value status
- Ring stiffness dynamic load simulation detects ground settlement adaptability
- Socket offset sealing test deflection angle 10° water pressure unchanged
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