„ELPLAST+” Sp. z o.o. manufactures PE-ST-PU-PE pipes and fittings, and also ST-PU-PE pipes and fittings. ST-PU-PE pipes consist of a steel carrier pipe, an insulation layer made of slow-burning polyurethane foam and a polyethylene casing pipe (PE-NP-AS).
PE-ST-PU-PE pipes has additionally an inner lining made from a polyethylene pipe.
Advantages of PE-ST-PU-PE pipes and ST-PU-PE pipes:
efficient thermal insulation – connections without thermal bridges (in case of the insulated joint)
possibility of insulating a joint – complete insulation tightness
no corrosion in the external casing pipe
Additional advantages of PE-ST-PU-PE pipes:
high smoothness of the PE pipe internal surface resulting in lower resistance of flow
high resistance to abrasion caused by liquids containing suspended solids
high chemical resistance to the vast majority of substances present in transported media
no encrustation – hydraulic parameters are constant in time