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API MPMS 2.7 Document Information:
Title
Manual of Petroleum Measurement Standards Chapter 2 - Tank Calibration Section 7 - Calibration of Barge Tanks
American Petroleum Institute
Publication Date:
Mar 1, 1991
Scope:
This standard describes three methods for determining the total and
incremental volumes of liquids
in barge tanks for coastal and inland waterway service that have
integral hull tanks. The three
methods are:
a. Liquid calibration.
b. Calibration by linear measurement.
c. Calibration from barge drawings.
Sections 2.7.7 through 2.7.9 describe procedures and equipment for
obtaining the requisite field
measurement data and suggestions for the orderly and complete
recording of field data. Sections
2.7.10 through 2.7.12 include procedures for calculating the total and
incremental tank capacities
from field data and suggestions for the presentation of capacity
tables. Examples of typical
calculations are presented in Appendix A. Terms specific to the
maritime industry are defined in
Appendix B.
For barges having independent tanks, refer to other sections of
Chapter 2 for a similar discussion
of horizontal, spherical, upright, and other mobile tanks. For the
larger oceangoing barges and
integrated tug barge units, refer to Chapter 2.8A.
This standard addresses liquid calibration procedures pertaining to
barges. For details relating to
metering systems, installation, meter proving requirements, and other
guidelines relating to liquid
calibration, refer to API Standard 2555.
The capacity tables should be computed so that volume is given at
standard conditions, that is, at
60°F (15°C). Appropriate liquid and tape temperature
corrections to 60°F (15°C)
should be applied. API Standard 2543 and Chapter 17 shall be consulted
for temperature
determination in the marine environment.
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