Recent content by psafety

In the paper manufacturing we provide (2) air systems from the same compressing station. Referred to as essential & non-essential. Paper has very large equipment that requires a controlled shutdown and these critical pieces are fed from the essential side, all else from the other.

I've known of inspectors that would bend if the isolation valves were "locked open" allowing a free path between the safety valve and vessel.

When direct consider failure of vakving when the tank is empty. Stean condensing on interior surfaces will be your largest vacuum hazard.

Weak outside wall. Point the end at the wall. Assure no cafeteria, meeting room is along axis. Its not Code as I'm aware, just good engineering practice.

NFPA 69 covers oxygen consentration for explosion protection.

Concur with Latexman.

If Flammable vapors are present normally ID1, If Flammable vapors are present abnormally (ie) by accident ID2. Vapors are probably heavier than air (confirm) then ventilation in at top out at bottom (sp gr based). Ribboms on vents confirm air movement.

Most sites I've worked (within one company) had test benches we used for non-code/non-UV testing. One site I gained the ability to adjustment within spring range of all UV valves from the State Inspector. If test sites were not close we required VR test data accompany the valve, for legal...

Google it. There are calculation methods available.

When direction is not dedicted, follow US Codes to be safe. In my opinion.

Now in the States ALL vessels are protected. MAWP only works in the the new code that was previously CC2211.

If a UV valve they should at least be sampled to assure accuracy is maintained in limits.

My Input, REFERENCES: INDUSTRIAL PERFORATORS ASSOCIATION; TESTING BY BOYLE ENGINEERING LABORATORIES and MARKS' MECHANICAL ENGINEERS HANDBOOK -psafety

On centrifugal in paralell we use checks as safeties. This is air I'm referring.

Steam Tables don't work??