HMT provides tank calibration service, commonly known as "Tank Strapping" which is the procedure for measuring storage tanks, barges, ships, or any bulk liquid container to provide the necessary dimensions for capacity table calculations. HMT services are developed under the guidance of applicable API Standards for tank calibration.

HMT employs a written policy and procedure manual to ensure all tank calibration work is performed in a uniform manner. All tank calibration work is conducted in strict accordance with sound engineering principles as well as the latest American Petroleum Institute (API) Manual of Petroleum Measurements Standard and International Organization of Standardization (ISO) Standards.

calibration service

All tank calibration work, including calculation and chart production, is performed in-house. HMT can customize calibration charts to meet the unique needs of customers, including: innage or ullage, feet and inches, decimal feet, or metric units. Our internal checks-and-balances procedures ensure that all measurements and computations are in accordance with the noted standards.

HMT’s calibration department is well known in the industry and is managed by a team with over 50 years of combined tank calibration experience. HMT’s calibration technicians are trained and approved to perform calibration in accordance with MPMS Chapter 2.2 “Tank Calibration”.

Calibration of storage tanks should be performed if the tank is newly constructed, has had structural modifications, is in conjunction with API 653 Inspections, or in a minimum of 15-year intervals as recommended by API. Additionally, recomputations of calibration charts may be required if there have been changes in stored products that have different gravities, changes in floating roof weights or leg positions, or if there is a reference gauge height variation.

Calibration Services from HMT Include:

  • Aboveground storage tanks
  • Underground storage tanks
  • Spheres
  • Horizontal tanks
  • Tank trailers 
  • Ships
  • Barges
  • Bottom surveys
  • Liquid calibration by positive displacement meter (for tank trailer and railroad car calibration)
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