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Document API MPMS 12.2.4 ERTA is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
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API MPMS 12.2.4 ERTA Document Information:
Title
Manual of Petroleum Measurement Standards Chapter 12 - Calculation of Petroleum Quantities Section 2 - Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction Factors Part 4 - Calculation of Base Prover Volumes by the Waterdraw Method
American Petroleum Institute
Publication Date:
Jul 1, 2009
Scope:
This document provides standardized calculation methods for the
quantification of liquids and the determination of base prover
volumes under defined conditions, regardless of the point of origin
or destination or units of measure required by governmental
organizations. The criteria contained in this document allows
different individuals, using various computer languages on
different computer hardware (or manual calculations), to arrive at
identical results using the same standardized input data.
This publication rigorously specifies the equations for
computing correction factors, rules for rounding, the sequence of
the calculations, and the discrimination levels of all numbers to
be used in these calculations. No deviations from these
specifications are permitted since the intent of this document is
to serve as a rigorous standard.
Purpose
When most of the older standards were written, mechanical desk
calculators were widely used for calculating measurement
documentation, and tabulated values were used more widely than is
the case today. Rules for rounding and the choice of how many
figures to enter in each calculation step were often made on the
spot. As a result, different operators obtained different results
from the same data.
This five-part publication consolidates and standardizes
calculations pertaining to the metering of petroleum liquids, using
turbine or displacement meters, and clarifies terms and expressions
by eliminating local variations of such terms. The purpose of
standardizing the calculations is that all parties will produce the
same unbiased answer from the given data. To obtain identical
results from the same data, the rules for rounding, sequence, and
discrimination of numbers (decimal places) have all been
defined.
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