SC/T 4050.2-2019 in English
VALIDGeneral technical requirement of trawl- Part 2: Float
- Issued on:2019-08-01
- Implemented on:2019-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$70.00
$68.00
$68.00
| Standard No: | SC/T 4050.2-2019 |
| Document status: | VALID |
| Title in English: | General technical requirement of trawl- Part 2: Float |
| Title in Chinese: | 拖网渔具通用技术要求 第2部分：浮子 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2019-08-01 |
| Implemented on: | 2019-11-01 |
| Professional Classification: | SC-Aquaculture |
| Related Topics: | General Technology Network
trawl float fishing gear Air flotation machine technical requirements |
Introduction
Standard Technical Framework
| Core Elements | Technical Requirements | Test Methods |
|---|---|---|
| Appearance Quality | No deformation/crack, impurity diameter ≤3mm | Visual inspection + ruler measurement |
| Physical Properties | Buoyancy ≥6N, pressure resistance 1500-4000kPa | SC/T 5002-2009 |
| Impact Resistance | No breakage after falling from a height of 2m | Free fall test |
Analysis of key technical indicators
The standard stipulates that hard spherical ABS float must meet the following requirements:
- Pressure resistance classification: three water depth levels of 150m/200m/300m, corresponding to a working pressure of 1500-3000kPa
- Buoyancy requirements: minimum buoyancy value ranges from 6N (240mm specification) to 30N (400mm specification)
- Safety factor: the crushing pressure must reach 1.33-2 times the working pressure
Implementation suggestions
Key points for production quality control
Take Ø260mm float as an example:
- Raw material selection: ABS plastic melt index should be controlled at 15-25g/10min
- Injection molding process: mold temperature is maintained at 60-80℃ to avoid bubbles
- Factory inspection: ≥18 samples are taken from each batch, with emphasis on pressure resistance and sealing
Background of standard evolution
Main updates of the 2019 version:
- Added 300m water depth grade requirement
- Cleared HDPE material reference implementation
- Detailed impact resistance test conditions
Sample only — not a preview of SC/T 4050.2-2019
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