... Standards: ISO2531,ISO4422, EN545,EN598,BS4772,AWWA C110, JIS G5526; Ductile iron pipe fittings1. Standards : ISO2531, ISO4422, EN545 , EN598 , BS4772 , AWWA C110 ... .2. material :GGG500-7 or other Ductile iron . 3. Coating : Fusion bonded epoxy coating ; cement lining and zinc ... : NBR or SBR rubber seal ring, G.I steel or ductile iron bolts and nuts available upon request ...