... 200,000 metric tons annual output. Our Malleable iron pipe fittings' output is listed No.1 in ... threads qualityCertificate: BSI, ISO 9001, ISO 14001Product list1Malleable Cast Iron Pipe FittingsAnnual Output: 100,000 tons2Steel Pipe Nipples & ... Merchant CouplingsAnnual Output: 20,000 tons3Screwed Ductile Iron and Cast Iron Pipe Fittings 4Ductile Iron Grooved Fittings & CouplingsAnnual Output: 40,000 ...