GB/T 18404-2022 in English
VALIDMineral insulated metal-sheathed thermocouple cables and thermocouples
- Issued on:2022-10-12
- Implemented on:2023-05-01
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD):
$370.00
$359.00
$359.00
《GB/T 18404-2022铠装热电偶电缆及铠装热电偶》由TC419(全国仪表功能材料标准化技术委员会)归口,主管部门为中国机械工业联合会。
Introduction
Interpretation of the key points of the core standard revision
| Major changes | Requirements of the 2016 version | Requirements of the 2001 version |
|---|---|---|
| Expansion of multi-core structure | New double-branch/triple-branch structure | Only single-branch structure is allowed |
| Insulation resistance specification | Dynamic standard for classification in Tables6-7 | Fixed numerical limit |
Key material technical specifications
According to Chapter 4, the materials of qualified casing are:
- 304 stainless steel: Ra≤3.2μm
- High purity magnesium oxide insulation: Purity ≥96%
Typical outer diameter specification comparison:
| Structural type | Standard outer diameter (mm) | Casing wall thickness (mm) |
|---|---|---|
| Single branch | 1.5/3.0/6.0 | 0.15-1.08 |
| Double branch | 3/6.4/8.0 | 0.14-0.97 |
Electrical test standards
According to the electrical strength test requirements in Table 5:
- For bushing>3.2mm
DC test voltage: 500V±5% - Grounded measuring terminal
Head welding thickness: 0.1D~0.8D
Sample only — not a preview of GB/T 18404-2022

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