Black polyethylene pipe coils and green polypropylene pipe bundles stacked on a sandy yard under harsh midday sun, one bundle covered with a grey tarpaulin, desert hills behind

How Much Pressure Rating Do You Actually Lose to Heat and Sun? De-Rating Curves for PPR, PEX, HDPE and PVC

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A specifier in Riyadh, Lagos or Seville reads PN20 on a PP-R pipe and PN16 on a PE100 coil, and the site runs at 45 °C ambient for four months a year. Every one of those ratings is silently a 20 °C number. Polymer pipe UV and temperature derating comes down to one question: how

How Much Pressure Rating Do You Actually Lose to Heat and Sun? De-Rating Curves for PPR, PEX, HDPE and PVC Lire plus "