CSA NGV4.3-2018 Temperature compensation guideline for compressed natural gas vehicle fueling.
3 Definitions and abbreviations The following definitions apply in this Standard: . Fill pressure一the pressure attained at the actual time of flling. Fill pressure varies according to the gas temperature in the container, which is dependent on the flling parameters and the ambient conditions. Fueling station一a facility for the dispensing of natural gas and includes all stationary equipment and associated components downstream from the inlet of a compressor manual shutoff valve. Full fill – the condition in a container when its settled pressure and temperature are at the levels that will result in the container’s pressure being equal to its service pressure at an internal gas temperature of 21 °C (70。F). Manufacturer – – the person or organization responsible for the design, fabrication, and testing of the equipment and components. Maximum allowable temperature – the maximum temperature for which the manufacturer has designed the equipment (or any part to which the term is referred) when handling the specified fluid at the specified pressure. Maximum allowable working pressure (MAWP) – the maximum pressure to which a component is designed to be subjected when handling the specified fluid at the maximum specified temperature. P30 – 20 700 kPa (3,000 psi), service pressure of. P36 – 24 800 kPa (3,600 psi), service pressure of. Service pressure – the settled pressure at a uniform gas temperature of 21 °C (70 °F) when the vehicle fuel container is fully charged with gas. This Standard defines standard pressure of 101.325 kPa (14.696 psi) at 288.15 K (15.00。C, 59.00 °F). Note: The service pressures in common usage are 20 700 kPa (3,000 psi) and 24800 kPa (3,600 psi) at21。C (70 °F). Service temperature range – the temperature range the containers are subjected to in normal service. Settled pressure – the pressure in a container after the temperature of the gas has achieved equilibrium.CSA NGV4.3 pdf download.