This part of SANS 966 specifies requirements for modified polyvinyl chloride) (PVC-M) pipes (with integral joints that incorporate rubber sealing rings) and fittings (post-formed from pipe made of PVC-M) that are intended for above-ground and below-ground pressure applications for the conveyance of potable water in reticulation systems and for other applications, in which continuous temperatures in excess of 25 °C are not encountered. Minimum wall thicknesses based on a design stress rating of 18 MPa are given for pipes of nominal outside diameter 50 mm to 630 mm. Six classes of pipe are covered, together with post-formed fittings and bends.
This part of SANS 966 also includes requirements for the components of rubber joint rings.
Fittings made by hot-gas and hot-plate fusion techniques are not covered in this part of SANS 966.
NOTES
1 Although the PVC-M pipes and fittings covered by this part of SANS 966 are intended for the conveyance of cold potable water, they may, subject to the approval of the manufacturer, be used for the conveyance of other liquids at other temperatures.
2 Injection-moulded fittings as detailed in SANS 966-1 are designed also to be used with pipes manufactured in accordance with this part of SANS 966.