Hebei Industry Chiho 1, pressure vessel flange Scope: This standard specifies the use of influenza flat steel pressure vessel welding flange structural formula and series size. This standard applies to nominal pressure 0.25-1.6MPa, the working temperature is higher than -20 ℃ ~ 300 ℃ influenza steel pressure vessel welded flange 2, the pressure vessel flange flange standard references: JB / T4700-2000 pressure Classification and technical conditions vessel flange JB / T4704-2000 3 non-metallic container structure and size of the various types of flange sealing surface welded flange structure influenza soft heat sink JB / T4704-2000 and other long stud Type and family size should meet the following requirements of steel flange production, quality and collar flange of the table below. Hebei Chiho steel flange pipe industry standards; Ministry of Chemical Industry Standard: HG5010-52 ~ HG5028-58, HGJ44-91 ~ HGJ65-91, HG20592-2009 (PN series) \ HG20615-2009 (Calss series) machinery of the standard: JB81-59 ~ JB86-59, JB / T79-94 ~ JB / T86-94, JB / T74-1994 Pressure Vessel Code: JB1157-82 ~ JB1160-82, JB4700-2000 ~ JB4707-2000 steel flange Applications : boilers, pressure vessels, petroleum, chemical, shipbuilding, pharmaceutical, metallurgy, machinery, food and other industries. Alloy Steel Flanges according to plans processing high-pressure steel flanges _ Hebei Chiho (certified) _ steel flange provided by Chiho Hebei Industry Co., Ltd. Hebei Chiho Pipe Co., Ltd. (www.hbqh628.com) (www.hbqh628.com) Hebei Cangzhou, forging leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Hebei Chiho leadership with the staff warmly welcome all inquiries negotiations to create the Hebei Chiho better future.