Technical Indexes Bulk Density:45-100kg/m3 Thermal Conductivity:0.035w/m.k Service Temperature:-120癈-400癈. Product Specification Pipe shell diameler: 18-630mm Shell thickness:30-150mm shell length:1000 Production Technique This product is pipe shaped product made from superfine rockwool felt with addition of phenol resin cementing agent forming shapes through solidification under pressure and heating.The surface may be coated with PVC film Or aluminum foil. Applications Mainly used in the heat and coldness preservation of piping in petroleum,chemical,thermal power industries and industrial heat supply and civil heat supply,etc.