JB/T 14516-2024 in English
VALIDHeat shrinkable silicone rubber tube for electrical use
- Issued on:2024-03-29
- Implemented on:2024-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$203.00
| Standard No: | JB/T 14516-2024 |
| Document status: | VALID |
| Title in English: | Heat shrinkable silicone rubber tube for electrical use |
| Title in Chinese: | 电工用热收缩硅橡胶管 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2024-03-29 |
| Implemented on: | 2024-10-01 |
| ICS Classification: | 29.035.20-Plastics and rubber insulating materials |
| Chinese Classification: | K15-Electrical insulating material and its products |
| Professional Classification: | JB-Machinery |
| Related Keywords: | shrinkable silicone rubber tube
φ20 silicone rubber tube electrical use electrical use introduction technical background silicone rubber modification technology |
Introduction
Technical background and industry value of the standard
As the first domestic industry standard specifically for heat shrinkable silicone rubber tube for electrical use, JB/T 14516-2024 fills the gap in technical specifications in the field of high-temperature insulation materials. The standard was jointly drafted by nine leading companies and incorporates the latest achievements in silicone rubber modification technology. Its release will regulate the application of high-performance insulation materials in my country's power equipment, new energy and other fields.
Core parameter analysis
| Key indicators | Standard requirements | Technical significance |
|---|---|---|
| Shrinkage ratio | ≥30% | Ensure tight wrapping of conductors |
| Electrical strength | ≥20kV/mm | High voltage insulation guarantee |
| Heat aging performance | 168h strength retention at 180℃ | Long-term heat resistance reliability |
| Low-temperature flexibility | No cracks at -40℃ | Adaptability to cold environments |
Comparative Analysis of Material Performance
The volume resistivity ≥ 1×10¹²Ω·m requirement specified in the standard is 2 orders of magnitude higher than that of ordinary rubber materials. In actual applications, after a UHV project used a Φ20 silicone rubber tube that met this standard, the partial discharge was reduced to less than 3pC (originally 15pC).
Key points of the test method
The standard innovatively stipulates a two-stage test method:
- Basic parameter test before shrinkage (5.3.1)
- Performance verification after 150℃ heat shrinkage (5.3.2)
Implementation suggestions
Manufacturers should pay special attention to the following:
- Type test trigger conditions (Clause 6.2) include 5-year periodic mandatory inspection
- Factory inspection adopts the S-3 special inspection level of GB/T2828.1
- Storage conditions directly affect the determination of the 3-year validity period
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