Hebei Cathay Pacific, [with] a long production weld neck flanges, weld neck flanges provided by Hebei Cathay. We are Hebei Cathay Pacific Pipeline Equipment Co. (www.hbgtgd.com) here: Hebei Cangzhou professional: elbows, flanges, tees, reducers, crosses, the socket, forgings, forged threaded flange pipe fittings and other products and the casting out of the flange flange casting, rough shape and size accurately weld neck flange, small processing volume, low cost, but there are casting defects (pores cracks inclusions.); casting streamlined internal organization of the poor (if it is cut pieces, streamlined worse); forged flanges generally lower carbon content than casting flange welded neck flange rust belt Hebei stock, forgings sleek good, relatively dense tissue weld neck flanges for sale cheap, excellent mechanical properties in casting flange; forging process large grains also appear improper or uneven hardening crack phenomenon, forging costs than casting flange. Forging than casting can withstand higher shear and tensile forces. The advantage is that you can come up with the casting complex shape with a long neck flange production cost is relatively low; forging advantage that even within the organization, there is no casting porosity, inclusions and other harmful defects; sliding flange: Slide flange has a low hub because the pipe before entering the single flange welding. This is welded inside and outside provide sufficient strength to prevent leakage. Sliding flange, the outer diameter is slightly larger than the boring matching the pipe. They are better than the neck flange welding, due to the lower initial cost, many users, but probably will not last more than the cost of installation, less because of the increased weld neck flange. Lap flange: flange is actually in the same lap sliding flange, unless it a radius between the hole and the flange race. This is necessary to accommodate the radius of the overlapping flange stub ends. Typically, lap and lap at the end of the stub mating flanges together to assemble the system