... ,ISO4422, EN545,EN598,EN969,BS4772,AWWA C110/ C153, JIS G5526; Ductile iron pipe fittings1. Standards : ISO2531, ISO4422, EN545 , EN598 , EN969, BS4772 , ... Accessories: NBR or SBR rubber seal ring,flange gasket, G.I steel or ductile iron bolts and nuts available upon request.6. ... Drilling/ Threading machine, 55% Ni welding rod,PE Sleeve for Ductile iron pipes Water pipeline Ductile iron pipe fitting