This safety bulletin was developed to prevent tampering of outlet connections on portable liquid cryogenic cylinders. The bulletin mandates the need for attaching these connectors through welding or silver brazing or integral machining techniques for cylinders used to carry medical gases. For industrial gases, a tamper-resistant device is allowed in lieu of the above requirement.
Recommended Practice for the Outfitting and Operation of Vehicles Used in the Transportation and Transfilling of Liquid Oxygen to be Used for Respiration
