What is the highest temperature resistance of polyurethane insulation pipe?

Polyurethane thermal insulation steel pipe is suitable for pipe network system with conveying medium temperature not higher than 120℃, occasional peak temperature not higher than 140℃ and working pressure not higher than 2.5Mpa. The production blanking of polyurethane foam thermal insulation steel pipe is 55-60℃, and the maximum temperature resistance can reach 120℃. The insulation layer adopts rigid polyurethane foam with the density of 60kg/m3 to 80kg/m3, which fully fills the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel pipe, the outer casing and the insulation layer form a solid whole. When the polyurethane insulated steel pipe with black jacket can withstand the temperature of -50℃- 120℃