After the bonding force test is qualified, the test site needs to be repaired and the test site is again electro-spark detection. Polypropylene reinforced fiber cold-wrapping tape (choose butyl gum type, tie 50-55% double-layer winding, total thickness of 2.2mm), polypropylene winding belt and heat shrink belt anti-corrosion layer of the bondwidth width should not be less than 100mm. The polypropylene winding belt should be winded around the weld. The construction of polypropylene winding belt may be constructed by artificial mechanical winding or automatic winding of mechanical winding. Construction methods and processes should comply with the requirements of the material specification, tangled construction should be continuous work, not overnight. The overall performance of the winding belt after construction should meet all the requirements of the B document.
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