This part of ISO 6993 specifies the requirements for pipes made of high-impact poly(vinyl chloride) (PVC-HI)
intended to be used for the supply of gaseous fuels through buried pipelines having an operating temperature
range of 0 ??C up to and including ??30 ??C and a maximum operating pressure of 1 bar (100 kPa) 1).
It is applicable only to pipes manufactured from the high-impact PVC materials PVC-A, PVC-CPE and
PVC-EPR. The pipes are suitable for those gases not containing potentially damaging components in such
concentrations as to impair the properties of the pipe material.