This document specifies the minimum values for expected strength as a function of time and temperature in the form of reference lines, for use in calculations on pipes made of:

a) polyethylene of raised temperature resistance (PE-RT) type I;

b) polyethylene of raised temperature resistance (PE-RT) type II; In Annex A, the procedure to demonstrate conformity to this standard is given and in Annex B, a guidance for designing piping components for relevant application classes.