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The product perform standards of GB/T17556-2010<Marine electric power and communication cable sheath material>,obey the regulation of XH-21A(operation temperature ) in the GB7594.9-1987, meet the standards of test flame-retardant property, can…
The product perform standards of GB/T17556-2010<Marine electric power and communication cable sheath material>,obey the regulation of XH-21A(operation temperature ) in the GB7594.9-1987, meet the standards of test flame-retardant property, can satisfy general cold resistance demand. Can be matched with the insulating rubber at operative temperature 90℃.
According to the regulation, the color of sheath should be black and gray, and also can be made as custom requested.
Performance comparison
Test item | Unit | GB7594.9-87 | Test value | ||
Before ageing | Tensile strength | Intermediate values | MPa | ≥10.0 | 12.9 |
Elongation at | Intermediate values | % | ≥300 | 428 | |
Heat ageing test of air box | Aging conditions | Temperature | ℃ | 100±2 | |
Time | h | 7×24 | |||
Tensile strength | Rate of change | % | ≤±30 | -6 | |
Elongation at | Intermediate values | % | ≥250 | 465 | |
Rate of change | % | ≤±40 | 9 | ||
Hot set test | Test conditions | Test temperature | ℃ | 200±3 | |
Load time | min | 15 | |||
Mechanical stress | MPa | 0.2 | |||
Load elongation | % | ≤175 | 40 | ||
Permanent deformation after cooling | % | ≤15 | 7 | ||
Oil test | Test conditions | Oil temperature | ℃ | 100±2 | |
Dipping oil | h | 24 | |||
Tensile strength | Rate of change | % | ≤±40 | -7 | |
Elongation at | Rate of change | % | ≤±40 | -4 | |
Ozone resistance test | Test conditions | Test temperature | ℃ | 25±2 | |
Duration | h | 24 | |||
Ozone concentration | % | 0.025~0.030 | |||
Tensile test | — | No cracking | No cracking |
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