Radiation crosslinking thermal contraction wrapping tape
Usage:
Used for the exterior anticorrosion and water resistance of the buried steel pipe, repair of crack and coating defects on protective layer, and the wrapping and anticorrosion of elbow.
Thermal contraction tarpaulin
Usage:
Used for encapsulation of the ends of various prefabricated jacket insulating pipes, and airtightness and anticorrosion of various reducing joints.
Thermal contraction sleeve
Usage:
Used for anticorrosion and crack repair of pipelines for oil and natural gas transmission and various urban pipelines.
Thickness of the products
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Item thickness ㎜ Deviation㎜
Backing material 1.0 ＋0.1
0
Base rubber 0.6 ＋0.2
0
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The selection of specifications shall conform to the pipe diameter. Under special circumstances, the product shall be customized.
Major technical indexes:
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Item Index Testing method
Tensile strength MPa >17 GB/T 1040
Breaking elongation >400 GB/T 1040
Vicat softening point >90 GB/T 1633
Brittleness temperature <-65 GB/T 5470
Environment stress cracking resistance time >1000 GB/T 1842
Breakdown strength resistance >25 GB/T 1408
Volume resistivity >1×1013 GB/T 1410
Peeling strength >35 GB/T 2792
Shear strength 1 GB/T 7124
Softening point >80 GB/T 4507
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Precautions:
（1）Application temperature of corrosion crosslinking material shall be <70℃.
（2）Heat shrink ratio shall usually be less than 0.45 (post-shrink / ex-shrink).
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