PE Gas pipes
Gas pipes that are used in construction of gas pipelines, made of high-density polyethylene PE80 or PE100 (MRS ≥ 8 MPa i.e. MRS ≥ 10 MPa) of a high quality that guarantees that the pipes will endure the same strain even after 50 years. The production and quality control are in accordance with the national SRPS EN 1555 standard.
The material is non-toxic and easy for handling and transportation. The pipes are flexible and resistant to vibration, seismic shocks and shifting of soil. The allowed permanent temperature load is up to +60ºC, whereas temporary allowed load is up to +80ºC. Due to the low friction coefficient, the loss of pressure is also low. The pipes are joined (depending on the diameter) using connectors or welding, which can be either electro-fusion or butt welding.
Produced in the standard black colour, with co-extruded yellow lines, the pipes bear the following markings:
- * Standard code: SRPS EN 1555
- * Outer diameter,
- * SDR marking,
- * Kind and type of material,
- * Marking: GAS,
- * Manufacturer’s sign,
- * Year of production,
- * Signs to mark the length of the coil, placed on a distance of 1m.
The polyethylene pipes used for the supply of gaseous fuels can be laid under the ground and under water. The methods used for laying the pipes are defined in the ‘Manual on Technical Norms for Design and Laying Distributive Gas Lines made of Polyethylene Pipes“.
The polyethylene pipes are produced to the diameter ranging from DN 20 to DN 110 and working pressures from 1, 4, 6 and 10 bar. The nominal diameter is the outer diameter.
The polyethylene pipes of with the diameter between DN 20 and DN 110 are packed in coils between 50 and 200 m of length, while the larger-diameter pipes are supplied in 6m and 12m rods. The drum used to make the coil of the pipe must not have a diameter under 18 x d, fashioned so as to preserve the oval form of the pipe.