20 # flange, Hebei Cathay shelf, 20 # flange large inventory provided by Hebei Cathay. 20 # flange | Hebei Cathay shelf | Hebei 20 # flange manufacturer Hebei Cathay Pacific Pipeline Equipment Co. (www.hbgtgd.com) 2014 upgrade been newly launched production of welded flange level and technical requirements shall comply with the requirements of JB4726-4728, according to certain standards of production and processing, to ensure the production and processing of products meet national quality standards. 1, PN is 20 # carbon steel flanges mounds production base 0.25MP-1.0MPa, the austenitic stainless steel welded flange allows the use of grade Ⅰ forgings. 2 In addition to these provisions, as 1.6MPa-6.3MPa, PN welded flange should conform Ⅱ Ⅱ grade or above grade level requirements forgings. Welded flange connection: flange nut 20 # flange professional manufacturers, bolting. Welding flange distortion, sealed, widely used 20 # flange large stocks, mainly used in pressure or temperature fluctuations pipeline or high temperatures, high pressure and low temperature piping 20 # flange, the advantage of relatively cheap, Nominal pressure does not exceed 2.5MPa; also used to transport expensive pipeline flammable, explosive medium, nominal in PN16MPa around. 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.