Symbol
psig
Pounds per square inch, gauge (unit of pressure)
In non- SI technical work, a gauge pressure of 32 psi is sometimes written as "32 psig" and an absolute pressure as "32 psia", though the other methods explained above that avoid attaching characters to the unit of pressure are preferred. Source: Internet
Most of the energy recovered from the cracked gas is used to make high pressure (1200 psig) steam. Source: Internet
The first patented vacuum casting machine and process dates to 1879. citation Low-pressure filling uses 5 to 15 psig (35 to 100 kPag) of air pressure to force liquid metal up a feed tube into the mold cavity. Source: Internet
The most standard pneumatic signal level used during these years was 3-15 psig. Source: Internet
The pressures in the supply lines under the streets vary, either utilization pressure (UP, the aforementioned 6" to 7" WC) or elevated pressure (EP), which may be anywhere from 1 psig to 120 psig. Source: Internet