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The range of available connection standards covers the majority of the range of industrial, ultra-pure and medical gases in use, including the medical pin index safety system, scuba cylinder valves and liquefied natural gas for home use. [5] The standards include: CGA V-1 Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections [5]
The American Standard Safety System, or ASSS, is a connection system for gas cylinders with a volume exceeding 25 cubic feet. The connections differ in thread type and size, right and left-handed threading, internal and external threading, and nipple-seat design.
A gas cylinder is a pressure vessel for ... will inspect the product for quality and safety. ... aluminum alloy cylinders is described in the guidelines: CGA V-11 ...
"We are honored to be recognized by the CGA for having the best safety record among large cylinder gas and bulk fleets," said Michael Molinini, Airgas President and CEO. "In 2012, our drivers ...
Gas cylinder valves for cylinder test pressures up to 300 bar – Part 1: Valve inlet and outlet connections ... Part 120: Guidelines for the inclusion of safety ...
DOT-3AA gas cylinders must be tested every 5 years and have an unlimited life. (Unless stamped with a star (*) in which case the cylinder meets certain specifications and can have a 10-year hydrostatic test life). Typically organizations such as DOT PHMSA, ISO, ASTM and ASME specify the guidelines for the different types of pressure vessels.
The pin index safety system uses a face seal between the cylinder valve and the associated yoke clamp. There are two holes in specific positions on the cylinder valve body below the outlet port , in positions associated with the gas mixture, which prevent connection of the cylinder to a yoke or pressure regulator with a mis-matched set of pins.
After a cylinder passes the test, the test date, (or the test expiry date in some countries such as Germany), is punched into the shoulder of the cylinder for easy verification at fill time. [note 1] The international standard for the stamp format is ISO 13769, Gas cylinders - Stamp marking. [1]
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