GB/T 45900-2025 in English
VALIDTest method of buoyancy material and modules properties for manned submersible
- Issued on:2025-06-30
- Implemented on:2026-01-01
- File Format:PDF
- Delivery:Via email within 5 business days
$364.00
| Standard No: | GB/T 45900-2025 |
| Document status: | VALID |
| Title in English: | Test method of buoyancy material and modules properties for manned submersible |
| Title in Chinese: | 载人潜水器用浮力材料和构件性能测试方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2025-06-30 |
| Implemented on: | 2026-01-01 |
| ICS Classification: | 47.020.05-Materials and components for shipbuilding |
| Chinese Classification: | U05-Vessel materials and their inspection methods |
| Professional Classification: | GB-National Standard |
| Related Keywords: | jiaolong buoyancy material test
elastic modulus ultrasonic test method torsional performance test test method hydrostatic external pressure test typical case component status test |
| Related Topics: | Organic material performance test method
Material Gravity Test Method |
《GB/T 45900-2025载人潜水器用浮力材料和构件性能测试方法》由TC306（全国潜水器标准化技术委员会）归口，主管部门为国家标准委。
Introduction
Interpretation of the core content of the standard
GB/T 45900-2025 standard systematically specifies the performance test system of buoyancy materials and their components for manned submersibles, mainly including:
| Test category | Key indicators | Test conditions | International benchmark |
|---|---|---|---|
| Material properties | 8 items | 25℃/1.25 times working pressure | ISO 21173:2019 |
| Component properties | 6 items | Including embedded parts/coatings | CCS 2018 specification |
Analysis of Key Technical Requirements
1. Density Test Specifications
Measurement using the displacement method, requirements:
- Instrument accuracy: electronic scale ≤1g, caliper ≤0.02mm
- Specimen size tolerance: GB/T1804-2000 roughness c
- Calculation formula: ρ=m/(L1×L2×L3)
2. Hydrostatic External Pressure Test
Typical Case: The Jiaolong buoyancy material test uses 1.25 times the working pressure (70MPa) for 24 hours, and the water absorption rate must be <0.5%
| Working Pressure | Test Coefficient | Fluctuation Range |
|---|---|---|
| ≤40MPa | 1.25 | ±5% |
| ≥60MPa | 1.10-1.15 | ±3MPa |
Recommendations for Standard Implementation
- Test Equipment Selection: The Withstand Pressure of the Pressure Cylinder Should Be ≥1.5 Times the Working Pressure
- Sampling Plan: The Component Inspection Ratio is Recommended to Be ≥30%
- Abnormal Handling: If the pressure exceeds the limit, the specimen must be replaced and retested
- Data Recording: Photos of the failure morphology must be included
Technology Evolution Analysis
Compared to the 2018 edition of the classification society rules, this standard adds:
- Bulk elastic modulus Ultrasonic test method
- Torsional performance test of embedded parts (≥200N·m)
- Component status test (including protective coating)
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 17435-2025 in English
Design and installation of electrolysis of seawater anti-fouling system for ship
2025-04-25 -
GB/T 17848-2026 in English
Test methods for electrochemical properties of sacrificial anodes
2026-01-28 -
GB/T 6384-2008 in English
The testing methods for seawater corrosion in natural environment of metallic materials for ship and offshore structures
2008-08-04 -
GB/T 39243-2020 in English
Technical requirements and test methods of marine biosoluble mineral wool product
2020-11-19 -
GB/T 25011-2010 in English
Test method and determination for DDT content of marine antifouling paints
2010-09-02 -
GB/T 17556-2010 in English
Sheathing materials for shipboard power and telecommunication cables
2010-09-02
