Gives the minimum values for expected strength of polypropylene pipes as a function of time and temperature in the form of reference lines, for use in calculations.
ISO 3213:1996 history
2009ISO 3213:2009 Polypropylene (PP) pipes - Effect of time and temperature on the expected strength
1996ISO 3213:1996 Polypropylene (PP) pipes - Effect of time and temperature on expected strength
1975ISO 3213:1975 Polypropylene pipes; Reduction of permissible stress as a function of time and temperature