A lap joint flange is a loose backing flange used with a lapped stub end. The stub end is welded to the pipe and provides the sealing face, while the backing flange supplies the bolting load. Because the backing flange can rotate before tightening,...
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An orifice flange is designed to hold an orifice plate and provide pressure-differential connections for flow measurement. The flange pair, pressure taps, orifice plate, gaskets, bore, and upstream/downstream orientation must be treated as one measurement...
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A raised face flange has a gasket seating area raised above the surrounding bolting plane. This geometry concentrates the bolting load on a defined gasket contact area. The facing dimensions, surface finish, gasket type, material, rating, and mating...
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A slip-on flange slides over the pipe and is normally attached with fillet welds. It is widely used because fit-up is straightforward and the flange can be positioned before welding. Correct selection still requires the standard, size, rating, material,...
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A socket weld flange has a machined socket that receives the pipe end. The pipe is inserted, positioned to the approved fit-up detail, and attached by a fillet weld at the hub. The socket helps locate the pipe, but correct bore, socket depth, pipe...
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A spectacle blind combines a solid blank and an open spacer in one figure-eight component. It is installed between two flanges and rotated so the line is either positively blocked or open. Its visible position helps operators confirm the isolation state.
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A weld neck flange connects to pipe with a butt weld at the tapered hub. The hub provides a gradual transition from the flange body to the pipe, so this type is often selected where pressure, temperature, cyclic loading, or joint reliability is important....
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An anchor flange is a pipeline component used to transfer axial and other design loads from the pipe into an anchor block, structure, or restraint system. Unlike common bolted pipe flanges, many anchor flanges are project engineered and manufactured to an...
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Flange standards define controlled systems for dimensions, ratings, tolerances, marking, materials, and testing within a stated scope. The purchase order must identify the exact standard and contract edition. “ANSI flange” by itself is usually incomplete...
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