Chemical pump steel flange applicable occasions

Steel flange type has a lot of, also is very commonly used in the chemical water pump installation, what kind of steel flange are there, here are several types of flange and applicable occasions; A, PL flat welding flange applicable occasions: pipeline pressure below PN16, medium: water, air, pressure is less than or equal to 0. 3 million of low pressure steam utilities, such as sealing surface is the selection of basic RF. Second, SO with flat welding neck flange applicable occasions: with flat welding neck flange applicable occasions: vacuum line, technological medium, steam. Vacuum line pressure is commonly used in PN16 PN10, in the process of medium, commonly used in steam piping pressure PN25 - The RF surface commonly used PN10, sealing surface. Three, SO take flat welding neck flange applicable occasions: utilities and non flammable and explosive medium, sealing requirement is not high, temperature - work 45~+200℃。 Commonly used seal face type RF surface, commonly used pressure of 150 lb, 300 lb. Four, Th thread flange applicable occasions: diameter less than or equal to 6 ( 6' ) Utilities, such as instrument used the occasion of taper pipe thread connection, generally for the NPT thread, this type of installation fast and convenient, but using pressure are generally low, commonly used pressure for 150 lb, sealing surface type for RF surface. Five, WN butt welding neck flange applicable occasions: commonly used in high voltage class pipe installation is WN flange, applicable occasions are: process medium, steam, usually inflammable, explosive, moderate damage, extremely toxic medium and highly virulent medium, commonly used seal face: FM RF M T G RJ. Commonly used pressure PN10 ~ PN160. Six, WN butt welding flange applicable occasions: this type of flange is used widely, the pressure range using the wide, 150 lb to 2500 lb in both, types of the sealing surface, FM, RF, M, T, G, RTJ, basic covers all applicable occasions, special sealing surface used for high temperature and high pressure, inflammable and explosive, poisonous and harmful medium. Seven, PJ/SE butt loose flange ring applicable occasions: stainless steel pipe in general carbon steel and stainless steel transformation, then there is the equipment to the site before the installation of a fixed line, commonly used seal face RF surface. Eight, LF/SE butt loose flange ring applicable occasions: stainless steel, nickel base alloy, titanium pipe flange connection, stainless steel or other transformation in the same pipe connection, then there is the equipment to the site before the installation of a fixed line, commonly used seal face RF surface, commonly used pressure 150 lb to 300 lb. Nine, SW socket welding flange applicable occasions: less than nominal diameter, etc. (( 2. '' ) Low-intensity circulation situations, use this type for small specification, reduced the trouble that for small size pipe butt welding, pressure 150 lb, 300 lb, 600 lb, 900 lb, commonly used seal face type RF surface.
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