API MPMS 4.9.1:2005(R2015) pdf download.Manual of Petroleum Measurement Standards Chapter 4—Proving Systems
2.0 Scope
Chapter 4, Section 9 covers all the procedures required to determine the field data necessary to calculate a Base Prover Volume (BPV) of either Displacement Provers or Volumetric Tank Provers. It will enable the user to perform all the activities necessary to prepare the prover, conduct calibration runs, and record all the required data necessary to calculate the base volumes of displace- ment and tank provers. Evaluation of the results and troubleshooting of many calibration problems are also discussed. This component, Chapter 4, Section 9, Part 1, is the Introduction, and contains all those relevant aspects that are general in nature, yet essential and applicable to all the different methods of calibration. Therefore, each subsequent part, which describes a specific method of prover calibration, must be used with Part 1. Together the two parts contain all the information that is essential to com- plete the required method of calibration.
4.0 Terms, Symbols and Applications
There are no definitions unique to this document. However, the publications selected in section 3.0 may be referenced for defini- tions relating to the calibration of displacement and tank provers. Terms and symbols described below are acceptable and in com- mon use for the calibration of meter provers. Where a term is specifically defined in another API MPMS Standard, that definition shall take precedence over the expanded definition used in the Terms section of this document. 4.1 TERMS 4.1.1 Base Prover Volume (BPV): The volume of the prover at base conditions, as shown on the calibration certificate package, and obtained by arithmetically averaging an acceptable number of consecutive Calibrated Prover Volume (CPV) deter- minations. 4.1.2 Calibrated Prover Volume (CPV): The volume at base conditions between the detector switches of a unidirectional prover, or the volume of a prover tank between specified “empty” and “full” levels, as determined by a single calibration run. The calibrated volume of a bi-directional prover is the sum of the two volumes displaced between detectors during a calibration round-trip. 4.1.3 calibration certificate package: A document package stating the Base Prover Volume (BPV) together with the phys- ical data used to calculate the BPV. It also includes the witnessed field data, summary calculations, and the traceability documen- tation. 4.1.4 double block and bleed valve: A high-integrity valve with double seals that has provision for determining whether either seal is leaking. 4.1.5 prover calibration pass: A single movement of the displacer between two predetermined detectors. 4.1.6 prover calibration run: One pass of a unidirectional prover or one round trip of a bi-directional prover, or one empty- ing or filling of a volumetric tank prover, which provides the data which allows the calculation of a single value of the Calibrated Prover Volume (CPV).