BS 1560-3.1:1989 - Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges - Specification for steel flanges
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This standard specifies requirements for steel flanges used in piping systems, valves, and fittings.
It covers dimensions, tolerances, materials, and mechanical properties of flanges.
The flanges are class-designated, indicating their pressure rating and application in various temperature and pressure conditions.
BS 1560-3.1:1989 - Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges - Specification for steel flanges