IGC Doc 59/98/E
Prevention of excessive pressure in cryogenic tanks during filling
Prevention of excessive pressure in cryogenic tanks during filling
Beschreibung
This publication is intended to provide guidance to the filler/owner of either transportable or static cryogenic tanks, detailing the systems and procedures that can be used to prevent them being over pressurized during filling (i.e., causing a catastrophic failure by excessive pressure). Vessels for which the upper pressure limit (UPL) cannot be exceeded by the maximum allowable pump feed pressure (MAPFP) do not require any additional protection. It is intended to address the issue of receiving vessels greater than 1000 L (264 gal) water capacity for liquid argon, nitrogen, oxygen, natural gas, helium, hydrogen, or ethylene. This publication should also be used for receiving vessels under 1000 L (264 gal) that are not designed for transport when full. This publication can also be used as guidance for other products and other transfer systems. It does not consider the hazardous nature of any product release, only the prevention of a failure of the tank due to pressure. Protective measures that prevent the overpressurization of receiving vessels in service (e.g., by failure of the vacuum, pressure raising, flame engulfment, etc.) are detailed in other codes and standards, and are not considered further here.
