Defines requirements for Bourdon tube (designated by 'B') indicating presure gauges, vacuum gauges and combined vacuum and pressure gauges having circular, spiral or coiled forms from 40 to 250 nominal size, with ranges up to 1600 bar, for measuring gauge pressure. Relevant gauges have circular dials with concentric scales for industrial and test use. Includes test procedures for performance for application at type approval and production piece tests.