1. Pipeline anti-corrosion

　　(1) Basic treatment

　　The bottom treatment quality of black sleeve insulation pipe directly affects the bonding quality and anticorrosive effect of anticorrosive coating. At present, the commonly used bottom treatment methods include spray desorption, chemical desorption, chemical desorption and chemical desorption. The common methods in the field are eruption and derusting.

　　(2) Anticorrosive structure

　　During the construction of anticorrosive coating, there is no effective construction method under the conditions of rain, snow, wind, sand and relative humidity.

　　The type of anti-corrosion coating shall be layered as specified. The coating thickness shall be uniform without flow, wrinkling, pinhole and hollow drum defects. After drying, maintenance methods can be taken. Tape type coating shall be strictly used. Control the construction temperature and do not overheat.

　　2. Pipeline insulation

　　When the thickness of the insulation layer of the black sleeve insulation pipe is greater than 100mm, it shall be layered. The insulation structure of non horizontal pipeline is from bottom to top, and the overlapping part of damp proof layer and maintenance layer is pressed down, and the overlapping width is not less than 30mm.

　　Before installation, check the switch status and guard line resistance value of the prefabricated insulation pipe with alarm line. The size of the alarm line shall meet the requirements of the goods, and then the pipe shall be welded. The alarm line shall be located above the pipe. Once the alarm line is damp, it shall be dried by preheating or baking.

　　Before the insulation work, the interface of the directly buried insulating pipe shall be inspected after the casing seal is qualified.

　　The above is a detailed introduction to the insulation function of polyurethane insulated steel pipe manufacturers for black jacket steel pipe. For more information, please click https://www.sdhpgy.com