Air Header vs Pressure Vessel Determination
Air Header vs Pressure Vessel Determination
(OP)
Dear, ALL !!
We have some arguments that whether or not the big air headers to supply air to the 16 reciprocating gas engines at air system in power plant are a pressure vessel.
Air header or vessel specification installed at power plant
§ have 2 headers, the length is 100foot, the diameter is 16 inches, the material is A106 B and the capacity is 140 cubic foot, also have the header relief valve set 475 psig. Each header has connected 8 pipes sized 1and ½ inches.
§ have 4 headers, the diameter is 24 inches, the material is A106 B and each header has the header relief valves set 475 psig. Each header has connected 4 pipes sized 1and ½ inches.
Those air headers look very similar pressure vessel because of the big sized pipe and pressure and capacity. But those headers have not the fuction of storage and made of seamless pipe under ASME Power Piping Code. But someone insists that those header is pressure vessel.. What do you think about that? and is there any special definition for determination?
We have some arguments that whether or not the big air headers to supply air to the 16 reciprocating gas engines at air system in power plant are a pressure vessel.
Air header or vessel specification installed at power plant
§ have 2 headers, the length is 100foot, the diameter is 16 inches, the material is A106 B and the capacity is 140 cubic foot, also have the header relief valve set 475 psig. Each header has connected 8 pipes sized 1and ½ inches.
§ have 4 headers, the diameter is 24 inches, the material is A106 B and each header has the header relief valves set 475 psig. Each header has connected 4 pipes sized 1and ½ inches.
Those air headers look very similar pressure vessel because of the big sized pipe and pressure and capacity. But those headers have not the fuction of storage and made of seamless pipe under ASME Power Piping Code. But someone insists that those header is pressure vessel.. What do you think about that? and is there any special definition for determination?





RE: Air Header vs Pressure Vessel Determination
Good luck,
Latexman
RE: Air Header vs Pressure Vessel Determination
If it ain't broke, don't fix it. If it's not safe ... make it that way.
RE: Air Header vs Pressure Vessel Determination
RE: Air Header vs Pressure Vessel Determination
If it ain't broke, don't fix it. If it's not safe ... make it that way.
RE: Air Header vs Pressure Vessel Determination
Check the design and fabrication drawings.
Pressure Vessels are defined in ASME Section VIII, Div 1 introduction:
"Pressure Vessels are containers for the containment of pressure either external or internal. The pressure may be obtained from an external source, or by the application of heat from a direct or indirect source, or any combination thereof"
Piping is a pressure-retaining component that conveys fluids.