This publication was developed to provide general safety and unloading guidelines to be used by service providers and providers of drivers and equipment to the compressed gas industry for the distribution of cryogenic liquids by bulk cargo tank. These guidelines assist drivers when there are physical differences between the cargo tanks, pumping systems, and customer storage tanks that the driver will operate during the unloading of cryogenic liquids.

NOTE—In this guideline, the use of “driver,” “operator,” and “unloading personnel” are interchangeable.

Specific details for pumping power systems are not included in this publication. The operator should refer to the appropriate operating manual before unloading liquid product at the customer station.

A warm storage vessel fill procedure is not within the scope of this publication. Warm storage vessels should be filled with the assistance of a cryogenic tank technician in accordance with a written procedure.