https://yse.yabesh.ir/std/handle/yse/150 2026-04-08T04:15:04Z https://yse.yabesh.ir/std/handle/yse/265348 GPA STD 2166; Obtaining Natural Gas Samples for Analysis by Gas Chromatography GPA - Gas Processors Association The purpose of this publication is to recommend procedures for obtaining samples from flowing natural gas streams that represent the composition of the vapor phase portion of the system being analyzed. These representative samples are subsequently transported to a laboratory and analyzed for composition and/or trace contaminants or analyzed onsite by portable or on-line chromatographs.  The methods outlined in this publication are designed for sampling natural gas from systems that are at or above the Hydrocarbon Dew Point temperature. As the temperature of the flowing stream decreases or the pressure increases to impinge upon the Hydrocarbon Dew Point. It becomes increasingly difficult to obtain a respresentative sample of the flowing stream. This standard does not address accounting for the liquid hydrocarbon portion of two-phase systems. The scope of this standard does not include composite gas sampling (samples taken in increments over relatively long time periods) systems. For information on composite sampling, the reader is referred to API 14.1 and ASTEM D5287. Due to a lack of supporting research data, the scope of this standard does not include sampling from vacuum sources. 2017-01-01T00:00:00Z https://yse.yabesh.ir/std/handle/yse/265349 GPA STD 8182; Mass Measurement of Natural Gas Liquids and Other Hydrocarbons GPA - Gas Processors Association This standard describes the criteria for the equipment selection, design, installation, calculation processes, operation, and maintenance of single-phase dynamic liquid mass measurement systems that operate in the density range of 351.7 kg/m3 to 687.8 kg/m3 at 15 °C and equilibrium vapor pressure. The mass measurement systems within the scope of this document include inferred mass measurement, where volume at flowing conditions is combined with density at similar conditions to result in measured mass, as well as direct mass measurement. 2018-01-01T00:00:00Z https://yse.yabesh.ir/std/handle/yse/265350 GPA STD 2140; Liquefied Petroleum Gas Specifications and Test Methods GPA - Gas Processors Association Purpose This standard encompasses the specification that generally defines physical properties and characteristics for liquid petroleum gases (LP-Gas) for use in private, commercial, or industrial applications. The current revision adds the referenced testing method for sulfur ASTM D-5623 and vapor pressure ASTM D-2598. It adds a footnote related to the vapor pressure reference method to be used in case of dispute. It also removes ASTM testing method year references and makes various editorial and spelling additions and corrections. 2017-01-01T00:00:00Z https://yse.yabesh.ir/std/handle/yse/265346 GPA STD 8173; Standard for Converting Mass of Natural Gas Liquids and Vapors to Equivalent Liquid Volumes GPA - Gas Processors Association This standard prescribes a method for calculating liquid volumes at equilibrium pressures and at temperatures of 60 °F, 15 °C, and 20 °C from the mass of a natural gas fluid (liquid or vapor) measured at operating conditions, in conjunction with a representative compositional analysis and published values for each component’s molar mass and absolute density. 2017-01-01T00:00:00Z