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High Density Polyethylene to DIN 8074 Series 4 & 5


National Plastic manufactures a range of High Density Polyethylene pipe strictly in accordance with the various international codes and standards based on DIN 8074 and ISO 161. For this range the designation of PE50 has been adopted, meaning the material has a design stress of 5.0 N/mm2.

The recommended working pressure of the pipe is derived using ISO 161 formula to give the maximum continuous working pressure at 20º C. The pipe is available in the following pressure ratings:

Series 4 - 6 BAR
O.D. Wall Length
25mm 2.0mm 150m coil
32mm 2.0mm 150m coil
40mm 2.3mm 150m coil
50mm 2.9mm 150m coil
63mm 3.6mm 150m coil
75mm 4.3mm 6m pipe
90mm 5.1mm 6m pipe
110mm 6.3mm 6m pipe

Series 5 - 10 BAR
O.D. Wall Length
20mm 2.0mm 150m coil
25mm 2.3mm 150m coil
32mm 3.0mm 150m coil
40mm 3.7mm 150m coil
50mm 4.6mm 150m coil
63mm 5.8mm 150m coil
75mm 6.9mm 6m pipe
90mm 8.2mm 6m pipe
110mm 10.0mm 6m pipe

High Density Polyethylene is non-toxic, offers high impact resistance and is non corrosive. It can be joined by the use of compression quick joints or by butt welding.