How to use polyolefin adhesive tape to protect steel pipes?

clear on the surface of the steel pipe welding slag, burrs, grease and dirt and other attached objects. For pipe coating overhaul, should use appropriate methods to remove the original coating and residue. After cleaning, reveal the defects on the surface of a steel pipe should be processed, attached on the surface of the abrasive dust, should be clean, steel pipe surface should be kept dry. When there is a return or surface contamination, rust must be surface pretreatment. Primer, to besmear to brush after pretreatment primer for steel surfaces prior to the time interval should be controlled within 6 hours, steel tube surface must be dry and clean. To besmear to brush after pretreatment primer for steel surfaces prior to the time interval should be controlled within 6 hours, steel tube surface must be dry and clean. Besmear brushs primer on steel pipe should be no leakage besmear, no bubble, clots and sagging, should form a uniform thin film. The thickness should be greater than or equal to 30 microns. Welds careful besmear to brush, in case of leakage. After waiting for primer table dry ( In normal temperature and natural air flow conditions, generally need to 5 - 10 minutes) To tie up with. Should pay special attention to in construction of low temperature or in the groove, table dry time, to ensure that the steel pipe bottom half table dry. Steel tube surface coating primer to tie up with the time interval after the appropriate control in eight hours, primer surface should be dry, clean, Sand blown or air humidity is big, should immediately wrapped belt) 。 Such as more than 8 hours or overnight, should besmear again before polyolefins adhesive tape of primer.