Midstream

Measurement & Quantity Determination (Measurement Committee)

GPA Midstream’s Measurement & Quantity Determination group surveys and meets the needs of the midstream industry for technical information, procedures and standards relating to measurement, sampling and safe handling of natural gas and natural gas liquids. This committee meets two times per year, most commonly in April and October.

Measurement & Quantity Determination Committee Charter

Committee Leadership

Chair: Trevor Morrison, Western Midstream
Vice Chair: Keith Fry, Howard Measurement
Young Professionals Liaison: Jennifer James, Phillips 66
GPA Midstream Staff Liaison: Martin Erne

Typical Committee Member

A typical committee member is an individual with appropriate job responsibilities and/or expertise relating to measurement, sampling and safe handling of natural gas and natural gas liquids. This committee accepts volunteers with appropriate experience, and members may also be assigned by a GPA Midstream member company.

Current Committee Members

GPA Midstream and GPSA members on the committee as of 02-01-2022 include:

A+ Corporation
AUX Sable Liquid Products Inc.
Chevron North American Production
Davis & Davis Company
Element Materials Technology
Emerson
Energy Transfer Co.
EnLink Midstream
Enterprise Products Operating LP
ExxonMobil/XTO
GasTech Engineering, LLC
Harvest Midstream
Hess Midstream
HighTec Energy
Howard Field Services, LLC
JP3 Measurement
Marathon Petroleum Corp.
Midstream Energy Group, Inc.
Momentum Midstream
MPLX LP
Mustang Gas Products, LLC
Mustang Sampling
ONEOK Inc.
Peak AI Solutions
PERC Engineering, LLC
Phillips 66
Phoenix Park Gas Processors Ltd.
Process Vision, Inc.
Quorum Software
Red Ball Technical Gas Services
San Mateo Midstream
Shimadzu Scientific Instruments
SICK Inc.
SPL, Inc.
Targa Resources, Inc.
TMCO Operating, LLC
V-TIC Services
Western Midstream Partners, LP
Williams
X-Treme Measures Consulting

Benefits of Committee Membership

Members of the committee have the opportunity to make an impact on industry standards affecting measurement and be actively informed of work on GPA Midstream standards. Networking opportunities are abundant with committee involvement, and committee members are able to share their own experiences and learn from others in the committee.

Products & Services

The committee has published the following standards, available in the GPA Midstream Publications area:

  • GPA 2145 - Table of Physical Properties for Hydrocarbons and Other Compounds of Interest to the Natural Gas Industry

  • GPA 2172 - Calculation of Gross Heating Value, Relative Density, Compressibility and Theoretical Hydrocarbon Liquid Content for Natural Gas Mixtures for Custody Transfer

  • GPA 8117 - A Simplified Vapor Pressure Correlation for Commercial NGLs

  • GPA 8173 - Method for Converting Mass Natural Gas Liquids and Vapor to Equivalent Liquid Volumes

  • GPA 8182 - Standard for Mass Measurement of Natural Gas Liquids and Other Hydrocarbons

  • GPA 8186 - Measurement of Liquid Hydrocarbon by Truck Scales

  • GPA 8195 - Tentative Standard for Converting Net Vapor Space Volumes to Equivalent Liquid Volumes

  • GPA 8217 - Temperature Correction for the Volume of NGL and LPG Tables GPA 23E, 24E, 53E, 54E, 59E, and 60E

Measurement Committee Workgroups

GPA 2172 Update
GPA 8195 Update
GPA Midstream Standards Style Guide
Proposed WG: GPA Midstream Glossary Update
Proposed WG: Pipeline Fill and Pack Methodologies and Determination
TP 27 Conversion to GPA Midstream Standard
TP15 Conversion to GPA Midstream Standard

Interaction with other GPA Midstream Committees/Outside Organizations

This committee works along and/or in conjunction with other organizations and individuals involved in natural gas liquids and gas measurement. Specific examples include relationships with the following organizations and a list of corresponding publications with which GPA has assisted:

American Petroleum Institute (API)

  • API 9.4 MPMS – Continuous Density Measurement Under Dynamic (Flowing) Conditions

  • API 14.6 – Continuous Density Measurement Under Dynamic (Flowing) Conditions

  • API 14.8 – Manual of Petroleum Measurement Standards Chapter 14 - Natural Gas Fluids Measurement Section 8 - Liquefied Petroleum Gas Measurement

  • API 14.7 – Manual of Petroleum Measurement Standards/GPA 8182 – Mass Measurement of Natural Gas Liquids

  • API MPMS 11.2.4 – Manual of Petroleum Measurement Standards Chapter 11-Physical Properties Data Section 2 Part 4 - Temperature Correction for the Volume of NGL and LPG Tables 23E 24E 53E 54E 59E and 60E

  • TP25 – Temperature Correction for the Volume of Light Hydrocarbons, Tables 24E and 23E (Joint Publication)

  • TP27 – Temperature Correction for the Volume of NGL and LPG (Joint Publication)

  • GPA 2172 (API 14.5) – Calculation of Gross Heating Value, Relative Density, Compressibility and Theoretical Hydrocarbon Liquid Content for Natural Gas Mixtures for Custody Transfer (Joint Publication)

American Gas Association (AGA)

GPA 2172/AGA5 – Calculation of Gross Heating Value, Relative Density, Compressibility and Theoretical Hydrocarbon Liquid Content for Natural Gas Mixtures for Custody Transfer (Joint publication in progress)

American Society for Testing and Materials (ASTM)

  • TP27 – Temperature Correction for the Volume of NGL and LPG (Joint Publication)

  • TP25 – Temperature Correction for the Volume of Light Hydrocarbons, Tables 24E and 23E (Joint Publication)

Bureau of Land Management

  • Onshore Orders 4

  • Onshore Order 5

National Institute of Standards and Technology

  • GPA 2145 – Table of Physical Properties for Hydrocarbons and Other Compounds of Interest to the Natural Gas Industry

  • GPA 2172 - Calculation of Gross Heating Value, Relative Density, Compressibility and Theoretical Hydrocarbon Liquid Content for Natural Gas Mixtures for Custody Transfer (Joint Publication in progress)

  • TP 17 – Table of Physical Properties of Hydrocarbons for Extended Analysis of Natural Gases (1988)

  • TP 27 – Temperature Correction for the Volume of NGL and LPG (Joint Publication)