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COLM: Liquid Measurement

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Paula Watkins
p: 202.682.8197


There are currently no upcoming events.

 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

 Meeting Materials



 Ballot IDStatusResultsOpensClosesDescription
Committee ID : 296COLM: Committee on Liquid Measurement
3588ClosedResolution Required05/21/201507/06/2015MPMS Ch. 12.2, 2nd Edition, March 2015, COLM Ballot
4253ClosedResolution Required08/31/201710/13/2017API MPMS Std 2554, 2nd Ed, September 2017, COLM Ballot
4304ClosedResolution Required11/19/201701/05/2018API MPMS Ch. 12.1.1, November 2017, Addenda
4341ClosedResolution Required01/23/201803/06/2018API MPMS Ch. 4.9.1, 1st Ed., January 2018, COLM Ballot
4338ClosedResolution Required01/17/201803/08/2018API 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
4340ClosedResolution Required01/17/201803/08/2018API 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
4498ClosedResolution Required06/17/201807/30/2018API MPMS Ch. 2.2B, 1st Ed., March 1989, Reaffirmation
4511ClosedResolution Required06/28/201808/06/2018API MPMS Ch. 3.5, 1st Ed., March 1997, Reaffirmation
4555ClosedResolution Required08/16/201810/01/2018API MPMS Ch. 3.2, 1st Ed, August 1995, Reaffirmation
4558ClosedResolution Required08/21/201810/01/2018API MPMS Ch. 5.6, 2nd Ed., August 2018, COLM Ballot
4565ClosedResolution Required08/26/201810/03/2018API MPMS Ch.2.2A, Annex A, August 2018, COLM Ballot
4646OpenIn Progress10/29/201812/12/2018API MPMS Ch. 3.1A, 3rd Ed., August 2013, Reaffirmation
4673OpenIn Progress11/08/201812/21/2018API MPMS Ch. 4.6, 2nd Ed., May 1999, Reaffirmation
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