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About This Item


Full Description

This standard describes measurement and calculation procedures for determining the diameters of upright welded (lap/butt) cylindrical tanks, or vertical cylindrical tanks, with a smooth outside surface and either floating or fixed roofs. The optical reference line method is an alternative to the manual tank strapping method for determining tank diameter. Chapter 2.2B should be used in conjunction with API Standard 2.2A.

Document History

  1. API MPMS Chapter 2.2B (R2019)


    Calibration of Upright Cylindrical Tanks Using the Optical Reference Line Method, Includes Addendum 1 (2019)

    • Most Recent
  2. API STD 2550

    Method for Measurement and Calibration of Upright Cylindrical Tanks, 1st Edition

    • Historical Version

Amendments, rulings, supplements, and errata

  1. API MPMS 2.2B Amendment 1


    Addendum to Calibration of Upright Cylindrical Tanks Using the Optical Reference Line Method