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API MPMS TR 2570-2010 pdf free download

API MPMS TR 2570-2010 pdf free download.Continuous On-line Measurement of Water Content in Petroleum (Crude Oil and Condensate).
3.2 emulsion An oil/water mixture that does not readily separate. 3.3 entrained water Water suspended in oil. Entrained water includes emulsions but does not include dissolved water. 3.4 flow proportional water measurement The flow weighted average water content over a fixed time period or batch volume determined from the OWD measurement and the liquid flow rate through the pipe during the time or batch period. 3.5 flow weighted average (FWA) The average of a variable weighted by the flow rate or incremental volume. It can be the average of the variable values sampled at uniform volume intervals, or it can be the average of variable values sampled at uniform time intervals and weighted by the incremental volume that occurred during that time interval. 3.6 footprint verification A number, a set of numbers, a table, an equation, or a curve representing the raw measurement (usually a frequency) of the meter, with a specific, uniquely defined content in the sensor section. The footprint should be recorded as part of factory calibration, so that it can later be used as a reference during a reproducibility check to verify that the meter has not changed its response. 3.7 free water Water that exists in a separate phase. 3.8 homogenous When a liquid composition is the same at all points in the container, tank, or pipeline cross section. 3.9 measurement location Point where the OWD measures the water content of the petroleum stream. 3.10 on-line water measurement device (OWD) A real-time measuring device that uses electronics to detect and calculate water concentrations in petroleum and petroleum products. 3.11 OWD system An OWD system may be comprised of one or more OWDs, stream conditioning, other measurement devices (e.g., temperature, pressure, density, flow, etc.), and a computer to assimilate, compile, and report the data. NOTE In this document, OWD and OWD system may be used interchangeably. The technical report does not preclude any technology that meets the scope.
5.3 Installation Requirements 5.3.1 The OWD system should be installed per the manufacturer’s recommended installation guidelines and API MPMS Chapter 8.2, Automatic Sampling, as applicable. For an OWD installed in an analyzer loop, the stream through the loop should be representative of the main piping stream. 5.3.2 Verification of OWDs requires spot samples from the pipe for analysis. Samples withdrawn from the pipe should be taken near the OWD sample point and be representative of the flowing stream. Follow the guidelines for manual sampling of pipeline streams in API MPMS Chapter 8.1 for the probe location, position, and size. 5.4 Auxiliary Instrumentation 5.4.1 OWD’s may use an input from one or more auxiliary measurement devices (e.g. for measuring temperature, pressure, density, salinity, viscosity, etc.). The accuracy of these auxiliary measurement devices should be verified frequently. The required frequency of verification (and recalibration as necessary) is dependent upon the application, the OWD manufacturer’s recommendations, site requirements, and oversight requirements such as control charts. 5.4.2 The output from the OWD will need to be input to a flow computer, or similar device, to flow weight average the water content. As an alternative, some OWD instruments will accept the flow reading to compute the flow weighted average water content. 6 Initial Acceptance Testing of OWD Systems 6.1 General 6.1.1 This section describes the method for the initial acceptance testing of OWD systems that are installed on pipelines and at marine loading/off-loading terminals. Other applications may not require initial acceptance testing. NOTE All components of the OWD system should be calibrated per manufacturer’s guidelines prior to initial acceptance testing as this section does not address calibration. 6.1.2 The method consists of the following parts (based on API MPMS Chapter 8.2, Appendix A).

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