ISO/TR 10501:1993

Thermoplastics pipes for the transport of liquids under pressure — Calculation of head losses

Gives a method of calculating head loss in the transport of liquids under pressure in hydraulically smooth thermoplastic pipes. The formulae given (for calculating head drop and head loss, for temperature correction) apply to the transport of water under pressure, or to all other liquids of the same dynamic viscosity, at temperatures of up to 45 °C.