EN 254:1990 Preinsulated Bonded Pipe Systems for Underground Hot Water Networks - Pipe Assembly of Ductile Iron Pipes, Polyurethane Thermal Insulation and Outer Casing of High Density Polyethylene
1990EN 254:1990 Preinsulated Bonded Pipe Systems for Underground Hot Water Networks - Pipe Assembly of Ductile Iron Pipes, Polyurethane Thermal Insulation and Outer Casing of High Density Polyethylene