Blind character suggests that it is shaped like eight words, it is the blind end, the other end of the ring is made of a combination of throttle, transmission fluid when using the throttle ring, then the use of blind weld neck flanges when cutting manufacturers, a bit like the role of shut-off valves with weld neck flanges parameters, which can be used to cut off when the valve is leaking. Relatively good sealing performance. The need for complete isolation of the system, are generally selected as a reliable means of isolation. Before and after the 8-word blind should have two shut-off valves, all in the closed state, the word blind swap eight states. Common heat exchanger and backup cast, cast and backup reactor, nitrogen pipelines and process piping connections, and so on. Another significant feature is the identification, easy to install recognizable state. The main role of the role played by blind character is completely cut off, like a high-performance 100% reliable weld neck flange, will not be a misuse of the gate valve. 0.25MP-1.0MPa, PN is carbon prime steel, 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. (3) meets one of the following conditions shall comply Ⅲ and forgings requirements: (1) Nominal pressure PN ≥ 10.0MPa flange forgings, (2) Nominal pressure PN> 4.0MPa chromium molybdenum steel forgings, (3) Nominal Pressure PN> 1.6MPa Working temperature ≤ -20 degrees Celsius and ferritic steel forgings. Quality weld neck flange weld neck flange _ _ Zhejiang Guotai specializes in producing welded flange provided by Hebei Cathay. If you have any questions about this information or consultation, please contact us now! Our Company Name: Hebei Cathay Pacific Pipeline Equipment Co., Ltd. (www.hbgtgd.com) Contact: Liu, or click on "Business League call" direct dialogue with us!