
Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges. Specification for steel flanges
出版:British Standards Institution

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Specifies Class 150 to Class 2500 and sizes up to 24 in. Requirements facings, dimensions, tolerances, threading, bolt sizes, marking, materials for bolting and flange materials with associated pressure/temperature ratings.
? British Standards Institution 2013
Amendment notes:
AMD 8593 published 15 July 1995
AMD 7557 published 15 June 1993