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 Committee Scope

The Subcommittee on Liquid Measurement (COLM) develops, approves and maintains standards dealing with the measurement of flowing hydrocarbon liquids, including:

  • Tank Calibration, MPMS Chapter 2
  • Tank Gauging, MPMS Chapter 3
  • Proving Systems, MPMS Chapter 4
  • Metering, MPMS Chapter 5
  • Metering Assemblies, MPMS Chapter 6
  • Calculation of Petroleum Quantities, MPMS Chapter 12
  • Statistical Aspects of Measuring and Sampling, MPMS Chapter 13 (Joint with
  • Measurement by Weight, MPMS Chapter 16
  • Crude by Truck, MPMS Chapter 18
  • Flow Measurement—Electronic Liquid Measurement, MPMS Chapter 21.2
  • Testing Protocols—MPMS Chapter 22 (Joint with COGFM)

For a complete listing of active COLM subordinate groups, click here. To access the sites themselves, you MUST be logged in.

COLM supports the API Downstream Department's Weight's and Measures Subcommittee.

 Forms & Reference Documents
 COPM Links


 Ballot IDStatusResultsOpensClosesDescription
Committee ID : 296275COLM: Committee on Liquid Measurement
4253ClosedResolution Required08/31/201710/13/2017API MPMS Std 2554, 2nd Ed, September 2017, COLM Ballot
4341ClosedResolution Required01/23/201803/06/2018API MPMS Ch. 4.9.1, 1st Ed., January 2018, COLM Ballot
4338ClosedPass01/17/201803/08/2018API MPMS Ch. 6.1A, 1st Ed., January 2018, COLM Ballot
4339ClosedResolution Required01/17/201803/08/2018API MPMS Ch. 6.2A, 1st Ed., January 2018, COLM Ballot
4340ClosedPass01/17/201803/08/2018API MPMS Ch. 6.3A, 1st Ed., January 2018, COLM Ballot
4465ClosedResolution Required05/02/201806/14/2018API MPMS Ch. 4.8, 2nd Ed., May 2018, COLM Ballot
4558ClosedResolution Required08/21/201810/01/2018API MPMS Ch. 5.6, 2nd Ed., August 2018, COLM Ballot
4743ClosedResolution Required02/11/201903/13/2019API MPMS Ch. 12.2, 2nd Ed., Feb 2019, COLM Ballot
4840ClosedResolution Required06/17/201907/30/2019API MPMS Ch. 2.7, 1st Ed, March 1991, Reaffirmation
4849ClosedResolution Required07/08/201908/19/2019API MPMS Ch. 2.2D, March 2014, Reaffirmation
4987ClosedResolution Required12/02/201901/13/2020API MPMS Ch. 2.2E, 1st Ed., August 2014, Reaffirmation
4988ClosedResolution Required12/02/201901/13/2020API MPMS Ch. 2.2F, 1st Ed., September 2014, Reaffirmation
5013ClosedResolution Required01/28/202003/10/2020API MPMS Ch. 4.6, 3rd Ed., January 2019, COLM Ballot
5021ClosedResolution Required02/03/202004/06/2020API MPMS Ch. 12.4.1 1st Ed., COLM Ballot
5348ClosedIn Progress11/30/202001/15/2021Reaffirmation of API Ch. 4.9.4
5370ClosedIn Progress01/15/202102/26/2021API MPMS Ch. 3.1B Level Measurement of Liquid Hydrocarbons in Stationary Tanks by ATG
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