1, Standards : ISO2531, ISO4422, EN545 , EN598 , BS4772 , 2.material : GGG500-7 or other Ductile iron . We supply half repair clamp according to ISO2531 or BS EN545, the coating of the fitting is zinc and bitumen or epoxy.1, Standards : ISO2531, ISO4422, EN545 , EN598 , BS4772 ,2.material : GGG500-7 or other Ductile iron . 3, coating : Fusion bonded epoxy coating ; cement lining inside and zinc ...