A practical guide from the team at Puranmal Sons & Ceramix Syndicate.
A pipe's pressure rating tells you the maximum working pressure it can safely handle. Using an under-rated pipe risks failure; over-rating adds cost. Getting it right keeps the system safe and economical.
PN indicates the pressure a pipe can handle in bar at a reference temperature — for example PN 6, PN 10, PN 16. Higher PN means a thicker wall and higher pressure capacity. It's commonly used for HDPE and PVC pressure pipe.
SDR (Standard Dimension Ratio) is the ratio of diameter to wall thickness — a lower SDR means a thicker wall and higher pressure rating. Schedule (e.g. Sch 40, Sch 80) is another wall-thickness system used for some CPVC and industrial pipe.
Match the rating to the working pressure, temperature and application. If you're unsure, tell us the use and we'll recommend the correct PN/SDR/Schedule and supply it.
Share your list or BOQ and we'll call back with pricing and availability, usually the same working day.
