Natural Gas Fluids Measurement: Concentric, Square-Edged Orifice Meters – Part 1: General Equations and Uncertainty Guidelines
Handbook / Manual / Guide by American Petroleum Institute, 09/10/1990

CLSI, HEI, ICC, IPC, NACE, NBBI, TAPPI
API
Natural Gas Fluids Measurement: Concentric, Square-Edged Orifice Meters – Part 1: General Equations and Uncertainty Guidelines
Handbook / Manual / Guide by American Petroleum Institute, 09/10/1990
Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids – Concentric, Square-edged Orifice Meters – Part 1: General Equations and Uncertainty Guidelines, Fourth Edition, Includes Errata, July 2013
Handbook / Manual / Guide by American Petroleum Institute, 09/01/2012
Errata for Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids – Concentric, Square-edged Orifice Meters – Part 1: General Equations and Uncertainty Guidelines, Fourth Edition
Amendment by American Petroleum Institute, 07/01/2013
Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids – Concentric, Square-edged Orifice Meters – Part 2: Specification and Installation Requirements, Fifth Edition, Includes Errata 1 (2017) and Errata 2 (2018)
Handbook / Manual / Guide by American Petroleum Institute, 03/01/2016
Natural Gas Fluids Measurement: Concentric, Square-Edged Orifice Meters – Part 2: Specification and Installation Requirements
Handbook / Manual / Guide by American Petroleum Institute, 04/30/2000
Errata to MPMS Chapter 14.3 Part 2: Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids – Concentric, Square-edged Orifice Meters – Part 2: Specification and Installation Requirements, Fifth Edition
Amendment by American Petroleum Institute, 03/01/2017
Errata to Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids – Concentric, Square-edged Orifice Meters – Part 2: Specification and Installation Requirements, Fifth Edition
Amendment by American Petroleum Institute, 01/01/2019
Natural Gas Fluids Measurement: Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids – Concentric, Square-Edged Orifice Meters – Part 3: Natural Gas Applications, Fourth Edition
Handbook / Manual / Guide by American Petroleum Institute, 11/01/2013
Natural Gas Fluids Measurement: Concentric, Square-Edged Orifice Meters – Part 3: Natural Gas Applications
Handbook / Manual / Guide by American Petroleum Institute, 08/01/1992