Loose Fit Alloy Flange, Loose Fit Flange, AlloyFranceManufacturers can be divided into five basic types based on their connection to pipes: flat welding flanges, socket welding flanges, threaded flanges, socket welding flanges, and loose fit flanges. Alloy flanges, loose fit flanges, and seal face types of alloy flange manufacturers are varied, with commonly used ones including raised face (RF), concave face (FM), male and female face (MFM), tongue and groove (TG), full flat (FF), and ring joint (RJ). Flat sealing surfaces of full alloy flanges, loose fit flanges, and alloy flange manufacturers are often used in conjunction with flat welding types for mild operating conditions (PNg1.0) and are commonly applied to cast iron flanges or steel flanges connected to cast iron.
Loose Fit Alloy Flange, Loose Fit Flange, AlloyFranceManufacturers typically provide adjustable flanges, commonly used in plumbing accessories (like expansion joints). Upon factory shipment, each end of the expansion joint is equipped with a flange, which is directly bolted to pipes and equipment in the project. These are flanges with a slip-on sleeve. Generally used on pipes, they allow for easy rotation of both pipe ends by loosening the bolts, followed by re-tightening. This feature facilitates the convenient assembly and disassembly of pipes.
Forged Steel Flanges, Loose Fit Flanges, AlloysFranceFactory Flange Sealing Surface: This is a widely used type, often used in conjunction with socket welding and plug welding. In "American Flanges," it is commonly used in pressure classes of PN2.0, PN5.0, and some PN10.0 MPa; in "European Flanges," it is commonly used in pressure classes of PN1.6 and PN2.5 MPa.
Oval Gear Flanges, Split Flanges, Alloy FlangesFranceManufacturer face sealing face: Often used in conjunction with socket welding and slip-on styles, it is not commonly adopted in "American flanges," but frequently used in "European flanges" at PN4.0 and PN6.4MPa grades. However, it is not convenient for the replacement of gaskets.
Alloy flanges and loose joint flanges are commonly used for material change connections. Loose joint flanges are secured to pipe ends using flanges, steel rings, etc., allowing the flange to move on the pipe end. The steel rings or rolled edges serve as sealing surfaces, while the function of the flange is to clamp them together. It is evident that due to being blocked by the steel rings or rolled edges, loose joint flanges do not come into contact with the medium. Loose joint flanges are suitable for connecting steel, aluminum, and other non-ferrous metals as well as stainless acid-resistant steel containers and corrosion-resistant pipelines.
