1 .1 These requirements cover shut-off valves, with or without relief valve, that are for use on cylinders that comply with the specifications and charging and maintenance regulations of the U.S. Department of Transportation (DOT) or the corresponding specifications and regulations of Transport Canada (TC).
1 .2 Valves covered by these requirements are for use on DOT or TC cylinders used for flow of gas into and out of the cylinder, in applications such as, but not limited to, automotive, medical, or industrial systems, vehicles, facilities, or providing fuel to buildings or appliances, and as covered in the following standards:
a) Liquefied Petroleum Gas Code, NFPA 58;
b) Design and Installation of Oxygen-Fuel Gas Systems for Welding, Cutting, and Allied Processes, NFPA 51 ;
c) Safety Requirements for the Storage and Handling of Anhydrous Ammonia – See CGA G-2.1 , CGA K61 .1 ;
d) Safety in Welding, Cutting, and Allied Processes, AWS Z49.1 ; and
e) Health Care Facilities, NFPA 99.
