The phenomenon of slow onset of polyurethane insulation pipe is generally in the autumn and winter season or the morning construction, Is caused by a sudden drop in temperature or low temperature, this time can be solved by increasing the ambient temperature and blackened material temperature, such as the black material temperature increased to 30-60 °C, the environment temperature to 20-30 °C can be resolved. The polyurethane insulation pipe from the phenomenon of fast speed generally appear in the spring and summer season or at noon construction, this is a sudden rise in temperature, caused by high temperature, At this time, we just need to use cold water to cool the black material or put it outside at night to cool naturally and avoid the sun.
Polyurethane insulation pipe foam strength is small and the foam is soft, Black and white material ratio is not balanced, at this time can be properly increased to solve the proportion of black material, but pay attention to black material ratio can not be too large, otherwise it will make the foam brittle, affecting the foam performance.
Polyurethane insulation pipe contains high strength polyethylene molecules, the structure is relatively stable, with high strength corrosion resistance to natural gas, artificial gas corrosion, liquefied corrosion and other properties. That is, there is no need for some other anti-corrosion equipment. Such a pipe as long as it is buried in the soil, and any chemicals contained in it will not have any corrosive effect on it, so you can use it with confidence.
Polyurethane directly buried insulation pipe in foreign developed countries has become a mature advanced technology, In the past ten years, China’s heating engineering and technical personnel through the study of this advanced technology, the laying of domestic pipe network technology to a higher level.
Polyurethane insulation pipes are mainly used for pipeline transportation. They can be used to transport some fluids, such as oil, natural gas and some ground water. These can be achieved through polyurethane insulation pipe which is widely used in modern society. The polyurethane insulation pipe is made of ordinary structural carbon steel, low-alloy structural steel or alloy structural iron. Polyurethane insulation pipe is widely used in high pressure boiler, hydraulic prop, high pressure gas bottle, oil cracking, automobile shell, diesel engine and fertilizer equipment.
