API MPM CH2.2C : 2002

1 SCOPE
2 NORMATIVE REFERENCE
3 DEFINITIONS
4 PRECAUTIONS
5 EQUIPMENT
   5.1 Equipment for Measurement of Angles
   5.2 Stadia
   5.3 Equipment for Bottom Calibration
6 EQUIPMENT SET-UP AND PROCEDURE
   6.1 Preparation of Tank
   6.2 Theodolite Set-up
   6.3 Stadia Set-up and Procedure
7 MEASUREMENT OF DISTANCE BETWEEN TWO THEODOLITE STATIONS
8 PROCEDURE FOR INTERNAL OPTICAL TANK WALL MEASUREMENTS
9 PROCEDURES FOR EXTERNAL MEASUREMENT
   9.1 General
   9.2 Reference Circumference Measured by Strapping
   9.3 Reference Distances Measured between Pairs of Theodolite
        Stations
10 TOLERANCES
   10.1 Distance Between Theodolites
   10.2 Horizontal Angles
   10.3 Reference Circumferences
11 OTHER MEASUREMENTS FOR TANK CALIBRATION
   11.1 Tank Bottom Calibration
   11.2 Reference Height Determination
   11.3 Other Measurements and Data
12 CALCULATIONS AND DEVELOPMENT OF TANK CAPACITY TABLES
   12.1 From Internal Procedure
   12.2 From Reference Circumference Procedure (Clause 9.2)
   12.3 From Reference Distances between Pairs of Theodolites
        (Clause 9.3)
   12.4 Development of Tank Capacity Table
APPENDIX A - COMPUTATION OF INTERNAL RADII FROM INTERNAL
             MEASUREMENTS
APPENDIX B - DETERMINATION OF THE RADIUS OF THE CIRCLE BY
             THE LEAST-SQUARES METHOD
APPENDIX C - COMPUTATION OF INTERNAL RADII FROM REFERENCE
             CIRCUMFERENCE AND EXTERNAL MEASUREMENTS
APPENDIX D - COMPUTATION OF INTERNAL RADII FROM REFERENCE
             DISTANCES BETWEEN PAIRS OF THEODOLITE STATIONS
APPENDIX E - METHOD FOR CALIBRATING BOTTOMS OF TANKS
APPENDIX F - SPECIFICATION FOR DIP-TAPE AND DIP WEIGHT

Defines the calibration of vertical cylindrical tanks by means of optical triangulation using theodolites.