Rigid preinsulated pipes:

Rigid preinsulated pipes with a steel carrier pipe:

The production programme for preinsulated pipes with steel carrier pipes comprises a line-up of all preinsulated pipes, fittings and fixtures to be used in transmission of a heating medium and hot tap water in carrier pipes of diameters of:

• for single pipes of diameters between Dn 20 and Dn 1000 mm;
• for double pipes of diameters between Dn 20 and Dn 200 mm;

Every steel pipe is blast cleaned up to purity degree I prior to insulating. The system pipes and fittings come in composite units made up form:

1. Single pipes – steel carrier pipe placed axially in a casing pipe made from high density hard polyethylene (PEHD) and a thermal insulation layer standard or standard-plus type made from rigid polyurethane foam (PUR) filling in the space between the pipes. They are manufactured in 6 or 12 metre sections. Preinsulated pipe and fitting ends are not insulated over a distance of 150 mm(±10 mm) in pipes of diameters up to Dn 200 mm, and over a distance of 200 mm (±10 mm) in pipes of diameters equal or above Dn 250 mm.
2. Double pipes – two steel carrier pipes placed in a single casing pipe made from high density hard polyethylene (PEHD) and a thermal insulation layer standard or standard-plus type made from rigid polyurethane foam (PUR) filling in the space between the two steel carrier pipes and the casing pipe. They are manufactured in 6 or 12 metre sections. Preinsulated pipe and fitting ends are not insulated over a distance of 150 mm(±10 mm). The spacing tolerance between the in-feed and out-feed carrier pipes measured at pipe ends ±1 mm, and when measured between two any points inside the double pipe unit is ±2 mm.