Sub-atmospheric gas system

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The National Fire Prevention Association categorizes sub-atmospheric gas systems, also called sub-atmospheric gas sources (SAGs), into two types:

• 3.3.28.5.1 Sub-atmospheric Gas Storage and Delivery System (Type 1 SAGs). A gas source package that stores and delivers gas at sub-atmospheric pressure and includes a container (e.g., gas cylinder and outlet valve) that stores and delivers gas at a pressure of less than 14.7 psia at NTP.
• 3.3.28.5.2 Sub-atmospheric Gas Delivery System (Type 2 SAGs). A gas source package that stores compressed gas and delivers gas sub-atmospherically and includes a container (e.g., gas cylinder and outlet valve) that stores gas at a pressure greater than 14.7 psia at NTP and delivers gas at a pressure of less than 14.7 psia at NTP.^[1]

References

1. http://www.solid-state.com/