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HEAT-SHRINKABLE SLEEVES (TUBES) FOR PIPE WARM AND PROTECTING PIPE FROM CORROSION
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HEAT-SHRINKABLE SLEEVES (TUBES) FOR PIPE WARM
AND PROTECTING PIPE FROM CORROSION
TECHNICAL REQUIREMENTS | |||
Accord with the standard of China Petroleum and Natural Gas General Co. SY/T4013-95,SY/T0415-96 | |||
Number | Item | Requirements | Test Methods |
1 | Tensile Strength(MPa) | ≥17 | GB/T 1040 |
2 | Elongation at break(%) | ≥400 | GB/T 1040 |
3 | Vicat Sofening Point(°C) | ≥90 | GB1633 |
4 | Brittlement temperature(°C) | ≤-65 | GB5470 |
5 | Dielectric Strength(Mv/m) | ≥25 | GB1408 |
6 | Bulk resistivity(23°C)Ω.cm | ≥1×1013 | GB1410 |
7 | ESCR(F50)(h) | ≥1000 | GB/T 1482 |
8 | Shore Hardness | ≥50 | GB/T531 |
9 | Impact strength(J/mm) | ≥10 | SY/T 4013 Appendix G |
10 | Water absorption(%) | ≤0.1 | GB 1034 |
11 | Chemical-resistance (7 days) (7d)(%)10%HCI 10%NaoH 10%NaCI | ≥85≥85≥85 | GB/T1040 |
12 | Thermal aging resistance(150°C,168h)Tensile Strength(Mpa)Elongation at break(%) | ≥14≥300 | GB/T1040 |
13 | Peel Strength(N/cm)Fixing flat/Heat-shrinkable tape(50±2°C)Heat-shrinkable tape (sleeve)/steel, coated steel(23±2°C) | ≥35≥45≥45 | GB/T2792 |
Note: 1, Tensile strength and elongation at break should be determined in axial and circumferential direction respectively.
2, Chemical resistance is remaining percentage of tensile strength and elongation at break after experiment.
3, The peel phenomenon at 23±2°C and 50±2°C should be adhesive internal break.
4, Heat-shrinkage ration of fixing flat should be less than 5%.
HEAT-SHRINKABLE SLEEVES (TUBES) FOR PIPE WARM AND PROTECTING PIPE FROM CORROSION
