[68c10airstream]

I work in a power plant full of pressure vessels, receiver tanks, air storage tanks, etc. All of the tanks have welded on tags stating it's working pressure (WP) and rated temp, etc. This tag is part of a safely designed tank meeting design requirements put out from the AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ALSO KNOWN ASME). No tag, Not safe in my eyes. Our power plant is 50 years old, i've drained 100's of gallons of water out of compressed tanks and never so mach as a pin hole