Forged Flange Size: 1/2"-64" (DN15 mm ~ 1600 mm) Material: ... the manufacturing-Raw material inspection,cutting,heating,gorging,heat treatment,machining,drilling,marking,washing,final inspection,packing,delivery,make sure our ... of 15,000 square meters.We are ISO9001,KS,API certified.We has possessed 5-ton Splint Hammer,2-meter ring ...