API MPMS 2B pdf download.Chapter 2 – Tank Calibration 2.2B.2 Scope This standard describes measurement and calcula- tion procedures for determining the diameters of up- right welded (lap/butt) cylindrical tanks, or vertical cylindrical tanks, with a smooth outside surface and either foating or fixed roofs. This standard should be used in conjunction with API Standard 2550. For external application of...