Zibo polyurethane buried pipe, Shandong insulation pipe manufacturer

Zibo polyurethane direct buried pipe Shandong insulation pipe manufacturer $r $n polyurethane foaming insulation steel pipe standard parameters relevant standards shall be in accordance with CJ/T114-2000 High density polyethylene sheath polyurethane foam prefabricated direct buried insulation pipe standard or EN253 Integral prefabricated insulation system for underground water heat pipe network, insulation pipe composed of working steel pipe, polyurethane insulation layer and polyethylene sheath. Seamless steel pipe shall be in accordance with GB8163 Seamless steel pipe for fluid transmission. Spiral steel pipe shall be in accordance with GB/T 9711.1-1997 Technical delivery conditions for steel pipe for oil and natural gas industries