Industry trends and buying guides for pipe fittings, valves, and flanges for B2B buyers.
In the ANSI vs ASME comparison, ANSI and ASME have different roles. ANSI coordinates and accredits parts of the U.S. voluntary standards system and approves qualifying documents as American National Standards. ANSI does not develop the technical...
ASME B16.1 flanges are gray iron pipe flanges and flanged fittings within the standard's stated Class 25, 125, and 250 scope. The standard covers more than bolt patterns. Its scope includes pressure-temperature ratings, materials, dimensions and...
ASME B16.47 flanges are large-diameter steel pipe flanges covered within the standard's stated NPS and pressure-class scope. A usable purchase description must identify the standard edition required by the contract, nominal pipe size, rating...
A blind flange closes a flanged opening without a center bore. It can terminate a line, close a vessel or valve connection, or provide an access point that can be opened later. Because the full pressure load acts on the solid plate, the correct standard,...
A flange size chart is useful only when it identifies the dimensional standard, edition, nominal size, rating, flange type, and facing. There is no single universal chart for every flange. The same nominal pipe size can have different outside diameters,...
To learn how to measure flange size, record several dimensions rather than relying on one diameter. The minimum useful set is flange outside diameter, bore or inside diameter, bolt-circle diameter, bolt-hole diameter, number of holes, flange thickness,...
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,...
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...
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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