API MPMS 8.2 2020 pdf download.Manual of Petroleum Measurement Standards Chapter 8.2 Standard Practice for Automatic Sampling of Petroleum and Petroleum Products.
18.104.22.168 Discussion—Systems may deliver the sample di- rectly to an analytical device or may accumulate a composite sample for offline analysis, in which case, the system includes sample mixing and handling and a primary sample container. 22.214.171.124 Discussion—Automatic sampling systems may be used for liquids. 3.1.2 batch, n—discrete shipment of commodity defined by a specified quantity, a time interval, or quality. 3.1.3 component testing, n—process of individually testing the components of a system. 3.1.4 dead volume, n—in sampling, the volume trapped between the extraction point and the primary sample container. 126.96.36.199 Discussion—This represents potential for contami- nation between batches. 3.1.5 droplet dispersion, adj—degree to which a fluid in an immiscible fluid mixture is composed of small droplets distrib- uted evenly throughout the volume of the pipe. 3.1.6 flow-proportional sample, n—sample taken from a pipe such that the rate of sampling is proportional throughout the sampling period to the flow rate of the fluid in the pipe. 3.1.7 free water, n—water that exists as a separate phase. 3.1.8 grab, n—volume of sample extracted from a flowing stream by a single actuation of the sample extractor. 3.1.9 homogeneous, adj—quality of being uniform with respect to composition, a specified property or a constituent throughout a defined area or space. 3.1.10 linefill, n—volume of fluid contained between two specified points in piping or tubing. 3.1.11 sample controller, n—device used in automatic sam- pling that governs the operation of a sample extractor. 3.1.12 sample extractor, n—in sampling, a mechanical de- vice that provides for the physical measured segregation and extraction of a grabbed sample from the total volume in a pipeline, slip stream, or tank and ejects the sample towards the primary sample container. 3.1.13 slip stream sample loop, n—low-volume stream di- verted from the main pipeline, intended to be representative of the total flowing stream.
3.2.3 portable sample container, n—vessel that can be manually transported. 3.2.4 primary sample container, n—container in which a sample is initially collected, such as a glass or plastic bottle, a can, a core-type thief, a high-pressure cylinder, a floating piston cylinder, or a sample container in an automatic sampling system. 3.2.5 profile average, n—in sampling, the average of all point averages. 3.2.6 profile testing, n—procedure for simultaneously sam- pling at several points across the diameter of a pipe to identify the extent of cross-sectional stratification. 3.2.7 representative sample, n—portion extracted from a total volume that contains the constituents in the same propor- tions that are present in that total volume. 3.2.8 sample, n—portion extracted from a total volume that may or may not contain the constituents in the same propor- tions as are present in that total volume. 3.2.9 sample probe, n—device extending through the meter tube or piping into the stream to be sampled. 3.2.10 sampling, n—all the steps required to obtain a sample that is representative of the contents of any pipe, tank, or other vessel, based on established error and to place that sample into a container from which a representative test specimen can be taken for analysis. 3.2.11 sampling system, n—system capable of extracting a representative sample from the fluid flowing in a pipe. 188.8.131.52 Discussion—system capable of extracting a repre- sentative sample from the fluid flowing in a pipe. (ISO 1998-6) 3.2.12 sampling system verification test, n—procedure to establish that a sampling system is acceptable for custody transfer. 3.2.13 secondary sample container, n—vessel that receives an aliquot of the primary sample container for the purpose of analysis, transport, or retention. 3.2.14 stationary sample container, n—vessel that is physi- cally fixed in place.