... pipe, also can be used for pure water system.2, heat insulating and energy-saving. Pp-r pipe ... and cold water systems, including centralized heat-supply system,2 the heating system, building, including floor, wall panels ... temperature for a long time, can choose C = 150,2, for more than 40 degrees Celsius (cold) system, the ... pipe wall thickness.Update Date:2010/6/10 2:42:29 valve stop valve ball valve