Issuing body
AGA
Latest edition
Parts 1–4, 2012–2018
Region
USA, Global
Equipment items
1
Scope
Custody transfer orifice metering of natural gas (US/global default).
Key requirements (8)
- Custody transfer orifice metering of natural gas (also as API MPMS Ch. 14.3).
- Concentric square-edged orifice plate per ANSI 2530.
- Flange or pipe (D, D/2) tap configurations.
- Mass/volume flow per equation Q = N·Cd·E·Y·d²·√(ρ·ΔP).
- Beta ratio range: 0.1 ≤ β ≤ 0.75.
- Plate inspection: bore diameter ±0.05%, edge sharpness < 0.0004·d radius.
- AGA-8 used for gas density (compressibility).
- Uncertainty: 0.4–1.0 % when calibrated properly.
Related standards (2)
Applied to 1 equipment item
Instrumentation & Control