Issuing body
ASME
Latest edition
2013 (R2018)
Region
USA, Global
Equipment items
1
Scope
Pressure gauges, transmitters, gauge attachments — accuracy classes, dial sizes, connections.
Key requirements (7)
- Pressure gauges — Bourdon and diaphragm types.
- Accuracy grades: 4A (±0.10%), 3A (±0.25%), 2A (±0.5%), 1A (±1%), A (±2/1/2%), B (±3/2/3%), 4 (±5%).
- Standard dial sizes: 1.5, 2, 2.5, 3, 4, 4.5, 6, 8.5, 12, 16 inches.
- Range selection: normal operating pressure should be in middle 50% of scale.
- Pulsation: snubber required for fluctuating service.
- Liquid-filled (glycerin) gauges damp vibration; preferred for reciprocating pump discharge.
- Diaphragm seals (chemical seals) protect gauge from corrosive/viscous media.
Related standards (1)
Applied to 1 equipment item
Instrumentation & Control