High-density polyethylene gas pipe(HDPE gas pipe) is made from high density polyethylene as the main raw material, adding a small amount of antioxidants, Anti-UV absorbers and pigments.
· Material: PE 80 or PE 100
· Pressure Rating: PN 0.3MPa, PN 0.4MPa, PN 0.5MPa and PN 0.7MPa
· Size: full 20mm through 450mm availability
· Standard: ISO4437
· Colors: yellow, black with yellow stripes and other colors upon request。

Advantages
· Corrosion Resistant: resist chemical matters and electron chemical corrosion。
· Low Flow Resistance: smooth interior walls and low friction
· Excellent Flexibility: can be supplied in coil。
· Easy Installation: light weight and handed friendly。
· Longevity: can work for more than 50 years under proper use。
· Various Joint Availability: butt fusion joint, electro fusion joint and transition joint。
· Recycled and Environment-friendly· Corrosion resistant: corrosion resistance of chemical mediator , no electrochemical corrosion
· Low friction drag: smooth interior walls leads to low friction drag
· Excellent flexibility: can be coiled
· Excellent workability: be convenient for transporting and installing because of light weight
· Longevity: more than 50 years under proper use
· Various joint availability: butt fusion joint and electrofusion joint available to make sure the identity of interfaces, structure and pipe body
· Safety and health

Applications
·PE gas pipe is suitable for gas transportation on condition that working temperature is among -20°C～40°C , and long-term maximum working pressure is not more than 0.7MPa.
·PE gas pipes are used for transporting natural gas, liquefied petroleum gas (gas state) and manufactured gas and so on. The working temperature is among -20°C～40°C and the maximum pressure of long term operation is not more than 0.7MPa.

Specifications
Material
PE80 PE100
Outer Diameter（mm） SDR17 SDR11 SDR17 SDR11
-Nominal Thickness,MM -Nominal Thickness,MM -Nominal Thickness,MM -Nominal Thickness,MM
20
2.3 3 2.3 3
25 2.3 3 2.3 3
32 2.3 3 2.3 3
40 2.3 3.7 2.3 3.7
50 2.9 4.6 2.9 4.6
63 3.6 5.8 3.6 5.8
75 4.3 6.8 4.3 6.8
90 5.2 8.2 5.2 8.2
110 6.3 10 6.3 10
160 9.1 14.6 9.1 14.6
200 11.4 18.2 11.4 18.2
250 14.2 22.7 14.2 22.7
280 15.9 25.4 15.9 25.4
315 17.9 28.6 17.9 28.6
355 20.2 32.3 20.2 32.3
400 22.8 36.4 22.8 36.4
450 25.6 40.9 25.6 40.9
500 28.4 45.5 28.4 45.5
560 31.9 50.9 31.9 50.9
630 35.8 57.3 35.8 57.3

Piping connections
· The ways of connecting of PE water pipe and PE gas pipe can be divided into electrofusion and butt fusion.
· The general principle of the PE pipe welding is that the polyethylene  is melting in 190-240 Celsius range(different grades of raw materials melting temperature generally is not identical also), then if the melt pipes can be full contact with the proper pressure (electrofusion of the pressure from the welding process polyethylene own expansion), after cooling can be firmly. PE water pipe, PE gas pipe and other material of  pipe, valve and fittings etc shall be using flange connection or PE/Steel transition connecting.
The connection types of PE water pipe and PE gas pipe can be divided into butt fusion joint and electrofusion joint.
The general principle of welding PE pipes is that the PE can be melted in 190-240 Celsius degree (melting temperatures generally are not identical for different grades of raw materials).Then if the melted parts are fully contacted keeping with proper pressure (the pressure of electrofusion comes from PE own expansion during welding), they can be connected firmly after cooling. Flange or steel-plastic transition joint should be adopted to connect PE water pipe or PE gas pipe with pipe valves and fittings and so on with other materials.