HDPE pipe size chart: outside diameter, wall thickness and bore
Full NS 40:2079 dimension table for HDPE pipe from DN 20 to DN 200 in PN 6 to PN 20, with the resulting internal bore.
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Technical articles
Guidance on specifying and using pipe.
Practical articles on HDPE sizing, Nepal Standard certification, material choice and looking after garden and delivery pipe.
What NS-40 certification means for HDPE pipe in Nepal
NS 40 is the Nepal Standard for polyethylene pipe for water supply. Here is what the licence covers, what is tested, and how to check a supplier's claim.
Read articleHDPE, PVC or GI: choosing pipe for a water scheme
A practical comparison of HDPE, PVC and galvanised iron pipe for water supply and irrigation in Nepal, covering jointing, terrain, lifespan and cost.
Read articleHow to make a garden hose last longer
Practical maintenance for PVC garden hose — storage, kinking, winter care and choosing the right bore for your tap pressure.
Read articleDelivery or rigid pipe for a pump set?
When lay-flat delivery pipe beats rigid pipe for irrigation pump sets, and when it does not.
Read articleNeed advice on a specification?
Our technical team can recommend the grade, diameter and pressure class for your application.