qingdao huangji casting co.ltd as a large, domestic production base, is a professional plant specializing in manufacturing of malleable iron pipe fitting , our company now own more than 200 employees, covers an area of 20, 000 square meters with a building area of 6, 000 square meters. With production equipment and inspection facilities of more than 50 sets. Our annual production capacity tops 2000 tons. In the production process , we adopt advanced melting technology closed dust removing cupola 30 mt energy saving annealing furnace heat treatment . hot dipped galvanization through upper heating galvanization furnace as well as advanced mechanical machining . owning to close check throughout the production process , the malleable iron pipe fitting produced and registered by our company with American Germany and british standard threads, are ensured in quality for their durability , brilliant and smooth surface , geometrical precision in size, guaranteed accuracy and convenience in using and interchangeability, Our regular available items with sizes varying from 1/4-3 inch (6-150 mm), covers more than 100 kinds: industrial flanges( 1/2-6 inch), 321 flanges, 342 unions, 372, 374malleable iron fitting , tees, steel pipe piles and so on. The production are suitable for water, vapor, gas, oil, and air. Due to the superior quality products are universally popular in USA, Germany, Southeast Asia, Japan, TaiWan. and enjoy high reputation around the world.