This standard is a consolidation and revision of the following five individual standards: B40.1, Pressure Indicating Dial Type - Elastic Element Gauges, B40.2, Diaphragm Seals, B40.5, Snubbers, B40.6, Pressure Limiter Valves and B40.7, Pressure Digital Indicating Gauges.This Standard is confined to analog, dial-type gauges, which, utilizing elastic elements, mechanically sense pressure and indicate it by means of a pointer moving over a graduated scale. It does not include gauges of special configuration designed for specific applications, edge reading, deadweight or mercury floated piston gauges, or any other gauges not utilizing and elastic element to sense media pressure.