scope:

This Standard applies to the design, location, construction, and operation and maintenance of facilities at any location for the liquefaction of natural gas and the storage, vaporization, transfer, handling, and truck transport of liquefied natural gas (LNG), as well as the appropriate personnel training.

This Standard covers all stationary containers and highway tanks, except frozen-ground containers, as used for the storage and highway transportation of LNG. Metal containers are classified in two groups for operation at a gauge pressure of

(a) 103 kPa and less; and

(b) more than 103 kPa. Containers with insulation systems applying vacuum are included in these classifications.

This Standard provides guidelines requirements for small LNG facilities (see Clause 2.1 and Appendix C). 

This Standard does not apply to the following:

(a) the transportation of refrigerants by any means;

(b) the transportation of LNG by railcar, marine vessel, or pipeline; or

(c) facilities designed to allow the use of LNG as a fuel for highway vehicles, railroad locomotives, or marine vessels.

Where existing plants, equipment, buildings, structures, and installations meet the applicable design, fabrication, or construction layout provisions of the edition of this Standard in effect at the time of installation, they may remain in use, providing they do not constitute a significant risk to life or adjoining property.