Rock wool tube and polyurethane can be used as insulation materials for radiator pipes. Comparatively speaking, the laying method of polyurethane thermal insulation directly buried pipe has many advantages over the traditional trench and overhead laying.
Polyurethane directly buried thermal insulation pipe is suitable for thermal insulation and cold preservation engineering of conveying various media within the range of -50℃- 150℃. The directly buried insulation pipe consists of a steel pipe for conveying medium, a high-density polyethylene jacket and a rigid polyurethane foam insulation layer between the steel pipe and the jacket.