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BUKAN PIPE

400 mm HDPE Pipe

Catalogue specifications for 400 mm polyethylene pipe.

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Prepared by the Bukan Pipe technical department — polyethylene pipe manufacturer since 1997, INSO 14427-2 standard mark licence holder

Published

400 mm HDPE pipe means pipe with a 400 mm outside diameter. That figure alone does not define an order — at this diameter the factory produces 11 different pressure classes, which differ in wall thickness and therefore in bore, weight and price. What completes an order is the diameter plus the SDR and the material grade.

At 400 mm, wall thickness ranges from 7.9 to 66.5 mm and nominal pressure from 2.5 to 25 bar, depending on the SDR and on whether the material is PE80 or PE100.

Pressure classes available at this diameter

400 mm outside diameter — wall thickness by SDR

SDR 51Wall thickness 7.9 mm — nominal pressure 2.5 bar in PE80, 3.2 bar in PE100
SDR 41Wall thickness 9.8 mm — nominal pressure 3.2 bar in PE80, 4 bar in PE100
SDR 33Wall thickness 12.3 mm — nominal pressure 4 bar in PE80, 5 bar in PE100
SDR 26Wall thickness 15.3 mm — nominal pressure 5 bar in PE80, 6 bar in PE100
SDR 21Wall thickness 19.1 mm — nominal pressure 6 bar in PE80, 8 bar in PE100
SDR 17Wall thickness 23.7 mm — nominal pressure 8 bar in PE80, 10 bar in PE100
SDR 13.6Wall thickness 29.4 mm — nominal pressure 10 bar in PE80, 12.5 bar in PE100
SDR 11Wall thickness 36.3 mm — nominal pressure 12.5 bar in PE80, 16 bar in PE100
SDR 9Wall thickness 44.7 mm — nominal pressure 16 bar in PE80, 20 bar in PE100
SDR 7.4Wall thickness 54.7 mm — nominal pressure 20 bar in PE80, 25 bar in PE100
SDR 6Wall thickness 66.5 mm — nominal pressure 25 bar in PE80 (the catalogue states no PE100 figure)

Figures from the factory catalogue (DIN 8074 / ISO 4427-2). A lower SDR means a thicker wall, a higher pressure rating and a smaller bore.

The nominal pressure figure applies at 20 °C. If the line runs warmer, the real allowable pressure is lower and has to be calculated with the temperature derating factor.

Supply form

  • SDR 41 (3.2 bar): straight lengths of 12 m
  • SDR 33 (4 bar): straight lengths of 12 m
  • SDR 26 (5 bar): straight lengths of 12 m
  • SDR 21 (6 bar): straight lengths of 12 m
  • SDR 17 (8 bar): straight lengths of 12 m
  • SDR 13.6 (10 bar): straight lengths of 12 m
  • SDR 9, 7.4, 6 (16, 20, 25 bar): straight lengths of 12 m

What to state when ordering

  • Outside diameter: 400 mm
  • SDR or nominal pressure — without it the enquiry cannot be priced
  • Material grade: PE80 or PE100
  • Application: water supply, gas, irrigation, sewerage or industrial
  • Length, supply form and delivery destination

FAQ

What wall thickness does 400 mm HDPE pipe have?
It depends on the pressure class. At 400 mm the catalogue offers 11 classes, from SDR 51 at 7.9 mm to SDR 6 at 66.5 mm. Without an SDR, the wall thickness is undefined.
What is the pressure rating of 400 mm pipe?
From 2.5 to 25 bar, depending on the SDR and material grade. Those figures apply at 20 °C; above that they must be corrected with the temperature derating factor.
Is 400 mm supplied in coils or straight lengths?
In 12 m straight lengths; at this wall thickness the pipe cannot be coiled.
How is 400 mm HDPE pipe priced?
By weight, not by the metre. Weight per metre follows from diameter, wall thickness and material density — which is why 400 mm costs differently in each SDR. Quote the diameter, SDR and quantity to get a current price.

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