1. standards : ISO2531, ISO4422, EN545 , EN598 , BS4772 , AWWA C110; 2. size: DN80-DN2600mm; 3. material : ductile iron . Ductile Iron Pipe Fitting 1. Standards :ISO2531, ISO4422, EN545 , EN598 , BS4772 , AWWA C110 .2. Material : GGG500-7 or other ductile iron .3. Coating : fusion bonded epoxy coating ; cement lining inside and zinc primer and bitumenpainting outside ; bitumen painting inside and ...