1, The prefabricated insulation quality requirements with the straight pipe(CJ/T155-2001). 2, For central heating systems. Widely used in the urban centralized heat supply, warm room, coal, petroleum, chemical and other industries’ anti-corrosion insulation work.Degrees:30°,45°,60°,90°Medium temperature: 50°C—140°COperating pressure: <1.6MpaLaid way: Buried, overhead, trenchDerusting grade of the ...