Gongyi City Water Supply Materials Co., Ltd. Heng flange technical use of CAD computer-aided design, professional development and production of metal pipe flange products, mainly stainless steel flange, flat welding flange, welded flange plate, plating zinc flange, flange GB, non-standard flange, flange and other large models, we have high quality products, first-class production technology, to create a first-class products.