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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 : 296COLM: 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
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
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
4646ClosedResolution Required10/29/201812/12/2018API MPMS Ch. 3.1A, 3rd Ed., August 2013, Reaffirmation
4673ClosedResolution Required11/08/201812/21/2018API MPMS Ch. 4.6, 2nd Ed., May 1999, Reaffirmation
4743ClosedResolution Required02/11/201903/13/2019API MPMS Ch. 12.2, 2nd Ed., Feb 2019, COLM Ballot
4825ClosedResolution Required05/20/201906/17/2019API MPMS Ch. 6.1 Annex, 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
4858ClosedResolution Required07/22/201908/26/2019API MPMS Ch. 5.3, 5th Ed., September 2005, and Addendum, July 2009 Reaffirmation
4878ClosedResolution Required08/02/201909/13/2019API MPMS Ch. 2.4/Std. 2554 1st Ed., September 2012, Reaffirmation
4973ClosedResolution Required11/13/201912/18/2019API MPMS Std. 2555 1st Ed., May 2014, Reaffirmation
4979ClosedResolution Required11/18/201912/30/2019API MPMS Ch. 4.1, 3rd Ed., June 2014, Reaffirmation
4980ClosedResolution Required11/18/201912/30/2019API MPMS Ch. 4.7, 3rd Ed., June 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
5240OpenIn Progress08/06/202009/17/2020Reaffirmation Ballot for API MPMS Chapter 5.2, 3rd Ed.
5245OpenIn Progress08/21/202010/02/2020Reaffirmation Ballot for API MPMS Chapter 5.4, 4th Ed.
5253OpenIn Progress08/28/202010/09/2020Reaffirmation Ballot for API MPMS Chapter 5.5, 2nd Ed
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