China oil and gas pipelines with a total mileage has exceeded 100,000 km, pipeline construction up to international standards. But in recent years, the detection of in-service pipeline found that due to heat shrinkable tape, heat shrinkable sleeve mending pipe failure caused by corrosion phenomenon is relatively common, restricted orifice antiseptic quality pipeline running key factor. Sinopec and PetroChina, according to the person in charge, there is an average of one kilometer oil and gas pipelines need to spot weld 92 corrosion, pipeline corrosion mending has become life and operational safety of the main constraints. Choose a good production of thermal zone (sets) business, good quality thermal materials, is to ensure the safe operation of the pipeline prerequisite and foundation. Applications: heat shrinkable sleeve for underground and overhead weld steel pipe corrosion and heat pipe insulation mending seal and design, but also for the whole heat shrinkable sleeve at the elbow pipe corrosion. Heat shrinkable sleeve is mainly used for long-distance pipeline corrosion and oil and gas pipeline insulation at the weld, heat shrinkable sleeve can also be used for pipe flange joints, lock hoop parts of the seal corrosion, the gas pipeline through the wall into the household parts corrosion, pipeline crossing projects across the sets. Heat shrinkable sleeve is also widely used underground, underwater, open-air, saline, desert environment of oil, gas and other pipeline projects in the field of municipal construction, while used in petrochemical, city gas pipeline network, heat pipes, electricity, metallurgy, water supply engineering mending steel pipes, Mending, interface, turn wound antisepsis and drainage, insulation pipeline project PE, PVC pipe joints sealed fixation.