This part of ISO 6993 gives the requirements for full-end load-resistant fittings and saddles 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 fittings and saddles manufactured from the high-impact PVC materials PVC-A,
PVC-CPE and PVC-EPR. It is applicable to joints with elastomeric sealing elements and of the solvent cement
type. The fittings and saddles are suitable for those gases not containing potentially damaging components in
such concentrations as to impair the properties of the fitting/saddle material.