Cangzhou City, Long Ze Pipe Sales Co., Ltd. (Diao Yawen 0317 -8230272 18731744075) I am for the oil industry, power plant manufacturing enterprises. Professional production: flange (concave flange, plate flat welding flange, with neck flat welding flange, with neck butt welding flange, integral flange, socket welding flange, threaded flange, welded ring loose cuff blue, flat welding ring loose flange, flange cover, liner flange) Stainless steel flange, carbon steel flange, steel flange, flange, corrosion resistant flange, elbow, elbow, three Tong, reducers and so on. Advanced flanges, fittings complete production lines 6, forged, forging, IF push the system, machining, cold forming, hot extrusion and heat treatment workmanship. Power Tube: My company for the petrochemical, power units designated manufacturers, and ship fittings manufacturing agency license. Flange Size: DN16mm-3100mm Thickness: 12mm-100mm Pressure: 0.25Mpa-- 25