... 10% 4.Hardness: HB<=150 Item Namepipe fittings, pipe clampsMaterial StandardMalleable iron, meet standard ASTM A197DimensionsOD SIZE, factory ... Output: 20,000 tons3Screwed Ductile Iron and Cast Iron Pipe FittingsAnnual Output: 12,000 tons4Ductile Iron Grooved Fittings & ... ,000 tons5Insulator CapsAnnual Output: 10,000 tons6Cast Bronze Pipe Fittingsannual output: 1,000 ton7Red Brass Nipples8Other kinds of ...