This method is for the preparation and cleaning of sample cylinders, and for sampling techniques necessary to obtain an air-free sample of a liquid hydrocarbon. The procedures are applicable to liquefied natural gases, high vapor pressure gasolines, various liquefied petroleum gases, air-unstable gasolines or other liquid hydrocarbon products that require rigorous exclusion of air. Sampling for the analysis of sulfur or other heteroatom compounds in C3-C4 fractions requires a special cylinder or a special cylinder preparation. An alternative to the sampling system and procedure is available as "Closed Sampling System," UOP, PIC. If the sample is to be transported offsite, see NOTE 1.
Citing ASTM Standards
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