“National PVC” uPVC Fittings

National PVC Fittings for upvc Fittings SLS 659: part 1: 1993 covers unplasticized PVC Pipe joints and fittings suitable for solvent  welding  The pipe fittings are categorized as Moulded products by injection moulding

Heat processed products from pipes conforming to SLS147 Both categories of pipe fittings are classified according to the working pressure ratings at 29 0 C.