Standard Practice for Storage and Use of Liquefied Petroleum Gases (LPG) in Sample Cylinders for LPG Test Methods

Importancia y uso:

5.1 LPG samples can change composition during storage and use from preferential vaporization of lighter (lower molecular weight) hydrocarbon components, dissolved inert gases (N₂, Ar, He, and so forth) and other dissolved gases/liquids (NH₃, CO₂, H₂S, H₂O, etc.). Careful selection of cylinder type, cylinder volume, and use of inert gas for pressurizing cylinders is required to ensure that composition changes are small enough to maintain the integrity of LPG when used as a QC reference material for various LPG test methods.

5.2 Monitoring of ongoing precision and bias on QC materials using control chart techniques in accordance with Practice D6299 can be used to establish the need for calibration or maintenance.

Subcomité:

D02.08

Referida por:

D4057-22, D1265-23A, D8094-21, D7994-17, D1265-23A, D4057-22, D1265-23A, D4057-22, D7423-23, D4057-22

Volúmen:

05.03

Número ICS:

75.200 (Petroleum products and natural gas handling equipment)

Palabras clave:

floating piston cylinder; liquefied petroleum gas (LPG); LPG sample storage cylinders; quality control (QC); standard 80 % fill cylinder;