PRE-INSULATED PIPES AND FITTINGS

CONSTRUCTION

PE-PU-PE pipe consists of two polyethylene pipes: outer – casing, PE-NP-AS type, and inner – conduit, PE-AS type, and insulating, flame-retardant polyurethane foam filling the space between them. For the production of pre-insulated pipes, PE-AS line pipes with diameters from DN16 to DN500 mm are used,

APPLICATIONS

• water
• water with a suspension of solids and mineral compounds present in mine waters
• brine
• other water solutions used in mining air-conditioning and technological installations
• chemically aggressive liquids (to which polyethylene is resistant)

APPLICATION PARAMETERS:

• pressure from PN 6.3 to PN 40
• temperature from -25˚C to + 45˚C

PIPE JOINING METHODS:

• welding (butt, electrofusion, polyfusion)
• flange connections
• Victaulic Style 995, 905 couplings
• compression fittings
• twisted fittings
• PE / steel transitions
• PE-AS electrofusion fittings

ADVANTAGES OF PRE-INSULATED PE-PU-PE PIPES:

• service life greater than that of steel pipes
• very good insulation – low thermal conductivity
• full insulation tightness, no thermal bridges at the joints
• no overgrowing of the pipes with sediment from the inside – hydraulic parameters unchanged over time
• high surface smoothness reducing flow resistance (up to 20% lower than in steel pipes)
• no corrosion of external and internal surfaces
• high abrasion resistance under the action of liquids containing solid suspensions
• high chemical resistance to most substances present in the transported media
• the possibility of using various techniques of connecting pipes

IMPORTANT

The PE-PU-PE pipe can be made with the use of an outer jacket made of PERC (scratch-resistant), PERT (high-temperature resistant) material.