Summary from Compressed Gas Association, Inc. PS-6--2004 and Safety and Health Committee Docket 04-05
Securing Compressed Gas Cylinders
At gas manufacturers' and distributors' facilities: The accepted safe methods for securing capped compressed gas cylinders in storage are the nesting of cylinders by positioning them in a tight mass using a contiguous three-point contact system with other cylinders or using a solid support structure such as a wall or railing. In seismically active areas additional safeguards may be warranted.
At user's sites: All compressed gas cylinders in service or storage shall be secured to prevent them from falling. An appropriate method for securing cylinders is by providing a substantial chain, rope, or strap that is positioned in front of or around the cylinder(s) and secured to a solid structure or rigid support.
Nested wall supported
The red arrows indicate cylinders that are out of compliance. With our cylinder racks all cylinders are individually secured so you don't have to rely on other cylinders for support.