Welded flange: Welding neck flange is usually referred to as "high hub" Flange. Its purpose is to transfer the pressure pipe, thereby reducing the flanged high stress concentration. Welding neck flange is the best designed butt those present, because of its inherent structural value provided flange. But the price is relatively high, because of the complexity of the production process of the product. Thread (thread) Flanges: The threaded flange is threaded to connect. But the center of the tube products have corresponding thread size. Its main advantage is that it can be assembled without welding. GB flange another layer of meaning: In accordance with the requirements of national standard dimensions, tolerances and other production flange, different from the standard sizes do not produce flanges, also known as two standard flange (someone called non-standard flange is incorrect) Hebei inventory weld neck flange, usually some unscrupulous businesses will reduce the flange thickness, diameter size to achieve the purpose of saving the two materials, as well as with scrap steel flange or mounds of scrap steel processing production weld neck flange, this steel is usually the chemical composition and mechanical properties of non-compliance of the waste, some even with private steel mills producing black flange weld neck flange Hebei providers, such private steel used in steel-making technology obsolescence can not guarantee the mechanical properties and weldability, and there may not be time to use welded steel or steel itself for cracks, holes and other leaks will be welded up, so try to use national standard method when purchasing flange Lan. If you must choose carefully observed under the limited funds two standard flange dimensions in order to avoid the situation and measures taken in the flange. Cathay Hebei, Hebei inventory [neck flange with], weld neck flanges provided by Hebei Cathay. Looking for "elbow, flange, tees, reducers, crosses, bearing plug, forgings, threaded pipe fittings and other products," fly suppliers, network operators choose to have the whole alliance certification: Cathay Pacific Pipeline Equipment Co., Ltd. Hebei ( www.hbgtgd.com), trustworthiness and reliability, "Business League call" on the page now click on live chat with us now!