HALF JOINT (SOCKET SEALING DEVICE) We supply half repair clamp according to ISO2531 ... .1, Standards : ISO2531, ISO4422, EN545 , EN598 , BS4772 ,2.material : GGG500-7 or other Ductile iron . 3, coating : Fusion bonded epoxy coating ... fittings , double flange pipe, single flange pipe, push-on Tyton socket fittings , Ductile iron/PVC fittings, K type bolted gland fittings ...