SGK – HDPE big size spiral pipes for non-pressure networks
BRIEF DESCRIPTION
HDPE structured wall pipes made through spiral winding technology which find application in non-pressure underground sewerage and drainage systems and road embankments crossing. They consists of a smooth inner surface for water flowing and an outer one (in different shapes and sizes) made of PP and PE that determines the ring stiffness, with or without an external flat PE surface. All pipe lengths are provided with an integrated junction socket and the respective spigot for the electrofusion or with grooves for the sealing gasket junction system. The diameters range (DN/ID) goes from 800 up to 2500 mm.
Ring stiffness:
| Standard EN 13476 | Standard DIN 16961 |
| SN2 (2 kN/m2) | Class 3 (SR24 8 kN/m2) |
| SN4 (4 kN/m2) | Class 4 (SR24 16 kN/m2) |
| SN8 (8 kN/m2) | Class 5 (SR24 31,5 kN/m2) |
| SN16 (16 kN/m2) | Class 7 (SR24 125 kN/m2) |
The two classifications of the ring stiffness according to the two distinct standards are not correlated, as they are data obtained through tests with different methods and times.
MAIN FEATURES
Wide range of diameters
Smooth or profiled outer surface
Wide range of structured profiles (moment of inertia) – ring stiffness
Socket connections with the electrofusion technology or with sealing gasket
High reliability of connections tightness
Lightweight and easy to install
High chemical and abrasion resistance
Inert to stray currents
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