AlphalinerPN – renovation of waste water pressure pipes

Structure of the AlphalinerPN

The AlphalinerPN consists of an ECR-glass-complex with a seamless inner coating and an UP resin (in accordance with DIN EN 13121 group 4 and DIN EN 16946-2 type 1140).Through a self-delevoped manufacturing process (winding) a highly compact composite material will be created, which shows a high ring rigidity and high axial strength properties. This means that even extreme and dynamic pressure loads can be absorbed.

The AlphalinerPN can especially independently withstand the constant alternating pressure loads occurring in waste water pressure pipes. During the fatigue strength test, which was based on the Wöhler test for fatigue strength according to DIN 50100 with overpressure of 10 bar and negative pressure of −0.9 bar, the AlphalinerPN showed no water loss through weeping. No external defects on the AlphalinerPN were detected after 10⁷ pressure change cycles.

To optimise the condition of the liner surface with regard to abrasion resistance and roughness, this AlphalinerPN has a specially refined, transparent, and highly resistant thermoplastic internal coating inseparably connected to the pure resin layer and the base glass complex. 

Technical characteristics AlphalinerPN

Specifications

Diameter	150 mm –1200 mm (6 in–48 in)
Wall thicknesses	3 mm – 20 mm (0.12 in –0.8in)
Single lengths	up to maximum 350 metres (1,100 ft)
Pipe materials	Steel, cast, thermoplastic, el al. / buried or laid free
Resin system	UP-resin according to DIN EN 13121 group 4 and DIN EN 16946-2 type 1140
Glass quality	ECR-glass
Installation pressure of the liner:	250 mbar –800 mbar (4–12 psi)
Curing/speed	300 Watt – 4000 W / 0.2 m/min – 2 m/min (depending on DN and wall thickness)
Operating pressure	up to 16 bar (232 psi)
Bursting pressure:	80 bar (1,160 psi)
Classification:	Class A of DIN EN ISO 11295
Possibility to renovate bends	Partly possible depending on the radius of the pressure pipe