GB/T 39313-2020 in English
VALIDRubber hoses and hose assemblies—Compact wire-braid-reinforced hydraulic types for oil-based or water-based fluids—Specification
- Issued on:2020-11-19
- Implemented on:2021-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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| Standard No: | GB/T 39313-2020 |
| Document status: | VALID |
| Title in English: | Rubber hoses and hose assemblies—Compact wire-braid-reinforced hydraulic types for oil-based or water-based fluids—Specification |
| Title in Chinese: | 橡胶软管及软管组合件 输送石油基或水基流体用致密钢丝编织增强液压型 规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-11-19 |
| Implemented on: | 2021-10-01 |
| ICS Classification: | 83.140.40-Hoses |
| Chinese Classification: | G42-Rubber tube, rubber belt and tape |
| Professional Classification: | GB-National Standard |
| Related Keywords: | type single layer steel wire
type double layer steel wire water-based fluids specification introduction analysis hose assemblies compact wire-braid-reinforced hydraulic types |
| Related Topics: | hose standard
hose production Steel wire braid reinforcement GBT39313 GB/T 39313-2020 Steel wire reinforced hydraulic hose and assemblies Mine steel wire reinforced hydraulic hose and assembly hose |
《GB/T 39313-2020橡胶软管及软管组合件 输送石油基或水基流体用致密钢丝编织增强液压型 规范》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC1（全国橡胶与橡胶制品标准化技术委员会软管分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
Analysis of the core content of the standard
| Type | Reinforcement layer structure | Maximum working pressure (MPa) | Applicable temperature range |
|---|---|---|---|
| 1SC type | Single layer steel wire braid | 6.3-22.5 | -40℃~+100℃ |
| 2SC/R16S type | Double layer steel wire braid | 16-42 | -40℃~+100℃ |
| R17 type | 1-2 layers of steel wire braid | Constant 21 | -40℃~+100℃ |
Key technical requirements
Dimension control
Within the nominal inner diameter range of 5-31.5mm, the outer coating thickness is strictly controlled at 0.8-1.5mm. Concentricity requirements: wall thickness change ≤1.0mm when inner diameter ≤19mm, ≤1.3mm when >19mm.
Pressure performance
The bursting pressure must reach more than 4 times the working pressure, such as the working pressure of 28MPa for R19 type corresponds to a minimum bursting pressure of 112MPa. The pulse test requires that the 1SC type withstand 150,000 pulses of 125% working pressure.
Materials and test requirements
| Test items | Test standards | Qualified indicators |
|---|---|---|
| Interlayer adhesion strength | ISO8033 | ≥2.5kN/m(1SC/2SC type) |
| Oil resistance | ISO1817 | Volume change rate0~+25% |
| Low temperature bending | GB/T5565.2 | -40℃ no cracking |
Implementation suggestions
- The applicable temperature range should be confirmed according to the fluid type (oil-based/water-based) when selecting
- The installation bending radius must not be less than the minimum value specified in the standard (e.g. 10mm pipe diameter must be ≥90mm)
- Perform pressure resistance tests regularly. It is recommended to conduct burst test sampling every 12 months or 3,000 meters of production
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