SC/T 4048.3-2020 in English
VALIDGeneral technical specifications for offshore cage--Part 3: Rope
- Issued on:2020-08-26
- Implemented on:2021-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
| Standard No: | SC/T 4048.3-2020 |
| Document status: | VALID |
| Title in English: | General technical specifications for offshore cage--Part 3: Rope |
| Title in Chinese: | 深水网箱通用技术要求 第3部分：纲索 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-08-26 |
| Implemented on: | 2021-01-01 |
| Professional Classification: | SC-Aquaculture |
| Related Keywords: | twisted rope
strength attenuation uhmwpe rope rope introduction interpretation % pa rope key technical indicators material type diameter range |
| Related Topics: | deep water
outlining deep box Airbox Technical Requirements Ultra deep freezer technology Ultra deep freezer technology Measuring Tool Cryogenic Box Technology Mold Steel Cryogenic Box Technology Tool Cryogenic Box Technology Measuring Tool Cryogenic Box Technology Mold Steel Cryogenic Box Technology Mold Steel Cryogenic Box Technology |
Introduction
Interpretation of the core content of the standard
As the third part of the deepwater cage series standards, this standard systematically regulates the technical system of cables, mainly including:
- 5 types of material systems: performance matrix of PE/PP/PA/PET/UHMWPE ropes
- 4 structural types: 3-strand twisted rope (type A), 4-strand twisted rope (type B), 8-strand braided rope (type L), 12-strand braided rope (type T)
- Full life cycle management: technical requirements from production inspection to transportation and storage
Comparison of key technical indicators
| Material type | Diameter range (mm) | Breaking strength deviation | Special requirements |
|---|---|---|---|
| PE rope | 4-72 | +10% | Special attention should be paid to wet strength attenuation |
| UHMWPE rope | 4-72 | +5% | Strength retention rate of the splicing area ≥90% |
| PA rope | 4-72 | +8% | A/B type and L/T type dual standards |
Implementation points
Marking system specifications
The standard innovatively adopts a six-segment coding system:
Fiber rope SC/T 4048.3-[structure code]-[diameter]-[material]-[heat treatment type]
Key test requirements
- Breaking strength test must be carried out in a dry new state
- The test value in the splicing area is allowed to be reduced by 10%
- Sampling formula: Ns=0.4×√N (N is the total number of rolls of 220m/roll)
Technology evolution analysis
Main breakthroughs of this standard compared with the old version:
- Added ultra-high molecular weight polyethylene (UHMWPE) material system
- Refine the indicators of the impact of heat treatment process on performance
- Introduce the interpolation calculation method (Appendix A) to solve the problem of determining non-standard diameter parameters
Typical case: After a deep-water cage project adopted T-24-UHMWPE cables, the tensile strength increased by 40% and the service life was extended by 3 times.
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