Mega Therm uses polyethylene raw material for the manufacture of gas pipes and fittings because the first priority in manufacture of natural gas pipes and fittings is ultimate safety. Because the pipe made of polyethylene raw material can easily be bent and not corroded. Polyethylene pipe is light in weight and it has a wide variety of fittings to be used in connection. The polyethylene raw material is very resistant to impacts.

The characteristics make the polyethylene pipes very easy to install, no need for frequent service and maintenance as well as very long service life. These features all mean very cheap and very safe installation for gas pipe lines. Mega therm uses world quality raw material in production of the gas pipes.

The raw material used in production of Mega Therm natural gas pipes is PE 80 (MRS=8 MPa, HDPE) and PE 100 (MRS=10 MPa). Mega Therm produces gas pipes in the diameter range between 20 mm - 400 mm. The fittings which are welded using electrofusion welding method ensure absolute leak proof for very long service time.

The quality of a chain is dependent on the elements one by one. In the pipe lines, the weakest points are the connection places. This becomes more vital if a long period leak proof is required. The quality of a pipe line, we can say is first dependent on the quality of connection points.

The electrofusion welding method used by Mega Therm guaranties a maximum safety in connection points of natural gas pipe lines where absokute safety is vital.

Polyethylenes are divided into 3 groups according to their densities as Low Density, Medium Density and High Density. Although the pipe resistance and stiffness increase from the bottom to the top, in contrast, its flexibility and impact strength increase. Because the natural gas pipes are more flexible and their impact strength are higher than the high density ones, they are recommended. Natural gas pipes are in PE80 class. The environmental strength value to be reached in the medium density is 8.0 MPa for now. When this level increases, the wall thickness will decrease and the fluid quantity passing through will increase. Because these pipes are from SDR11 class, when they are used for water, they can be used at 4 bar pressure in the natural gas line by changing the safety coefficient from 1,25 to 2,5 when used in PN 12,5 bar. Because the polymer chain is effected from the hydrocarbon structures, the safety coefficient is selected as high.

Because the pipes can be produced as a coil, they provide advantages in furnishing. Because the welding quantity decreases, the short lines can be furnished and they provide fitting and workmanship savings. In order to cancel out the natural gas leakage probability from the weld, only electrofusion welding is used which is the most safe welding method. The current is passed from the copper wires which are placed inside the fittings. The wire in which the current is passed is heated. The released energy melts the plastic. The volume of the melted plastic increases and melts the pipe by contacting with it. The molecular welding is performed with the pressure strength which is formed by the compaction in the intermediary region. It does not get harmed in earthquakes with its flexible structure and it eliminates the explosion risk.

Advantages

• It is not affected by the earthquake by its flexible structure.
• It keeps its flexibility when the temperature decreases to -40 °C.
• Can be used on the building site as coil.
• Show high resistance to chemicals.
• Does not face corrosion by the fluid inside and by the structure of soil outside.
• It is light as 1/8 of steel as its volume being 0.940 gr/cm3.
• It can be combined out of channel and then released to channel. Decreases the excavation amount.
• It dos not require the ground to be sensible excavated progressively.