... Blind Flange Socket Welding Flange, Alloy flange,Plate Flange class 200 of yellow paint steel flange ANSI Flange Size:1/2" ... the whole quality control system which covers every process of the manufacturing-Raw material inspection, cutting, heating, gorging ... inspection, packing, delivery. After Sales Service: Shipment tracking in time.Any problem happening of our products, once confirmation will ...