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A BS flange, or British Standard flange, is a type of flange manufactured according to the specifications set by the British Standards Institution (BSI). These flanges are widely used in various industries such as oil and gas, petrochemical, water treatment, and general industrial applications
What is BS flange
A BS standard flange is a type of flange that conforms to the standards set by the British Standards Institution (BSI), which is recognized by the abbreviation BS. British standard flanges are widely used in the United Kingdom and other regions that adopt British standards for piping systems. These flanges are designed to ensure compatibility, safety, and reliability in various industrial applications, including oil and gas, chemical, water treatment, and power generation.
Standards and Specifications of BS Flange
Main Standards
BS4504 Flanges: It specifies design, dimensions, materials, and testing requirements for circular flanges in piping systems, valves, and fittings. It covers nominal pressure ranges from PN 2.5 to PN 40 and nominal sizes up to DN 4000.
BS 10:1962: It contains flange dimensions and pressure ratings, with flange sizes ranging from small size 3 to large size 48, and pressure ratings from 150 psi to 2500 psi.
BS 3293:1960: Deals with the dimensions and tolerances of welding neck and slip-on flanges with pressure classes of 150 lb - 600 lb, as well as ring joint facings.