GB/T 41891.2-2022 in English
VALIDShips and marine technology—Inflatable buoyancy support system against flooding of ships—Part 2: Buoyancy chamber
- Issued on:2022-10-12
- Implemented on:2022-10-12
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$160.00
$156.00
$156.00
| Standard No: | GB/T 41891.2-2022 |
| Document status: | VALID |
| Title in English: | Ships and marine technology—Inflatable buoyancy support system against flooding of ships—Part 2: Buoyancy chamber |
| Title in Chinese: | 船舶与海上技术 船舶浸水防护用充气浮力支持系统 第2部分：浮箱 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2022-10-12 |
| Implemented on: | 2022-10-12 |
| ICS Classification: | 47.020.20-Marine engines and propulsion systems |
| Chinese Classification: | U23-Fire fighting equipment |
| Professional Classification: | GB-National Standard |
| Related Topics: | float
buoyancy GB/T 41891.2 GB/T 41891.2-2022 Box support system industry mooring floating drum |
《GB/T 41891.2-2022船舶与海上技术 船舶浸水防护用充气浮力支持系统 第2部分：浮箱》由TC137（全国船用机械标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Interpretation of core indicators of technical requirements for ship pontoons
Key performance test specifications
| Test items | Technical parameters | Test standards |
|---|---|---|
| Tensile strength | Warp≥1500N/50mm, weft≥1300N/50mm | ISO1421:2016 |
| Tear strength | Biaxial≥80N | ISO46741:2016 |
| Low temperature bending | -30℃ no crack | ISO4675 |
Key points for standardization implementation
High pressure hose assemblies should meet the following key requirements:
- Hydraulic test pressure: liquefied gas 12.5MPa, non-liquefied gas 20MPa
- Burst strength needs to reach 168% of the rated pressure
- Operating temperature range depends on the type of medium: liquefied gas -45℃~65℃, non-liquefied gas -20℃~65℃
Certification test implementation strategy
Extreme working condition verification method
- High temperature test: Inflate after maintaining in 65℃ environment for 7 hours
- Low temperature test: Check material flexibility after storing at -20℃ for 24 hours
- Pressure maintenance measurement: Operating pressure temperature rise ≤0.4kPa/℃, leakage rate <5%/30min
Material life extension management suggestions
Develop maintenance plan for key components:
- Metal parts must meet the 50-hour double cycle requirement in salt spray resistance test
- Coating adhesion remains ≥10N/10mm after wet heat aging
- The sewing strength retention rate is required to reach 70% or more after the aging test
Sample only — not a preview of GB/T 41891.2-2022
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