BS 1560-3.2:1989 - Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges - Specification for cast iron flanges
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This Section of BS 1560 specifies requirements for circular grey and malleable iron flanges having Class 125 and Class 250 designations and ductile cast iron * flanges having Class 150 and Class 300 designations.
BS 1560-3.2:1989 - Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges - Specification for cast iron flanges