GB/T 39230-2020 in English
VALIDCode of practice for installation and commissioning of heavy duty submarine cable recovery and releasing device
- Issued on:2020-11-19
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
《GB/T 39230-2020重型海底电缆收放装置安装与调试规程》由TC12（全国海洋船标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Analysis of the core content of the standard
| Technical elements | Horizontal laying device | Vertical laying device | Common requirements |
|---|---|---|---|
| Core equipment composition | cable reel, loading arm and other 9 major components | vertical tower integrated tensioner/A/R winch | Cable storage capacity ≥2000t |
| Installation accuracy (mm) | Core shaft verticality ≤1/1000 Flange flatness ≤0.4 | Contact rate 100% | |
| Debugging focus | Multi-device coordinated retraction and extension | Tower integrated system linkage | Constant tension test |
Key technical requirements
Installation accuracy control
The standard clearly requires that the center deviation of the cable drum base should be ≤2mm, and the verticality of the core shaft should reach 1/1000. In actual construction, a total station positioning is required, and a 0.05mm precision feeler gauge is used to detect the contact rate between the roller and the basket.
Welding quality specifications
According to GB50661, all load-bearing welds must be subjected to non-destructive testing:
- Ring beam welding adopts full penetration process
- Radial beam welding weld foot height ≥8mm
- Ultrasonic flaw detection ratio is not less than 20%
Key points for commissioning implementation
| Phase | Test items | Key technical indicators |
|---|---|---|
| Mooring commissioning | No-load operation | Speed deviation ≤5% |
| 1.25 times static load | Structural deformation ≤L/1000 | |
| Constant tension test | Fluctuation range±2% | |
| Navigation debugging | Dynamic laying | Speed matching error≤3% |
| Emergency stop | Braking time≤2s |
Standard evolution analysis
Compared with earlier ship standards, the innovation of GB/T39230-2020 is reflected in:
- For the first time, the contact rate quantitative index of 2000t-class heavy equipment is clarified
- The debugging process of the vertical tower integrated system is added
- Dynamic debugging requirements under dynamic positioning are introduced
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