HALF JOINT (SOCKET SEALING DEVICE) We supply half repair clamp according to ISO2531 or BS ... ,2.material : GGG500-7 or other Ductile iron . 3, coating : Fusion bonded epoxy coating ; cement lining inside and zinc primer andbitumen ... fittings , double flange pipe, single flange pipe, push-on Tyton socket fittings , Ductile iron/PVC fittings, K type bolted gland fittings ...