Steel flange type is introduced and performance standards

Use common steel flanges, for pipe connection, such as import and export of chemical water pump connection in the chemical industry and the use of the appliances daily life with the flange connection, there are many kinds of steel flange are: flange cover - 提单; Socket welding flange - 西南; Threaded flange - Th; Butt welding loose flange ring - PJ/SE； Plate flat welding flange - PL； With flat welding neck flange - SO； With butt welding neck flange - WN； Flat welding loose flange ring - PJ/RJ； Butt welding loose flange ring - LF/SE。 A, flange cover BL: also called blind flange, blind flange. Is the middle flange without hole, for sealed pipe plug. Role and welding head, pipe threaded cap is the same, only the blind flange and threaded pipe cap can be unloaded at any time, and the welding head is not. Blind flange sealing surface: plane ( FF) , tu ( RF) , concave and convex surface ( MFM) , the grooved surface ( TG) , RTJ ( RJ) Second, the socket welding flange - SW: SOCKET welding FLANGE with flat welding neck FLANGE is similar, but the difference with it, is the main inner parts more than a small step, welding inside the pipe pile to the steps, generally used in small diameter pipe, generally small butt welding FLANGE specifications welding difficult, with flat welding neck FLANGE and welding two welding seam, solved SOCKET welding, English name: SOCKET WELD FLANGE. Three, threaded flange Th: THREADED FLANGE is one of the welded metal flanges flanges, you just need to screw corresponding connection, convenient operation, English name is: THREADED FLANGE. But the general condition is not recommended to demand higher occasion, because this kind of flange is suitable for the working condition is not high pressure is not high. Four, butt loose flange ring - PJ/SE LF/SE: why will introduce two flanges together, because both the name of the FLANGE is welded RING FLANGE, using occasions are basically the same, to distinguish is a European system is a system of America, English name is FLAT WELDING WELDING RING LOOSE GLANGE and LAP to be FLANGE. Two kinds is seven kinds of flat welding flange, one kind is with flat welding neck flange. Role is used under the condition of one end of the pipe is fixed, because the flange can activity, so greatly improve the construction time. Five, the plate flat welding flange - PL: usually also called Flat Flange plate Flat Welding Flange or Flat Welding Flange, also known as lap Welding Flange, English for: Flat Welding Flange. Usage in engineering, also is a kind of flange of flange type of low cost. Flat welding flange pressure can be divided into: PN2. 5Bar、PN6Bar、PN10Bar、PN16Bar、PN25Bar、PN40Bar等( GB/T9119 - additionally 2010 standard of flat welding flange pressure and increased two kinds: PN63Bar, PN100Bar) , JIS standard is 5 k, 10 k. Six, with flat welding neck flange SO: flat welding neck flange welding and use similar to the plate flat welding flange, but superior to the welding cold, because the back is much more a neck SO pressure strength and strength has increased a lot, English name: Slip - On Flange。 Seven, with butt welding neck flange WN: butt WELDING NECK FLANGE by way of butt WELDING and pipe WELDING, applications are relatively high, pressure and high wear resistance strength, generally high-risk inflammable and explosive conditions such as using more, English name is: WELDING NECK FLANGE. Eight, flat welding flange - PJ/RJ: this type of flange with 6 kinds of flange basic similar, is only the flanging part change to flat ring, is consistent.
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