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Maximum pressure limit for steam boilers

Wednesday, August 01, 2018   By: atit [2266] 0 Stars
Dear all,

I was wondering if there is a code or law that limit a maximum pressure for boilers used in steam power plants. Or we can design a steam boiler as large as we want! If there are such codes, please inform me.

Thank you very much.

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Saturday, August 04, 2018   By: Murphy [21] 4 Stars
Hi,

As you guessed there is no limit for a boiler design code or laws as you put it. Yes, you can design a boiler as large in both pressure and physical size as you want, but you need to use a boiler design code that is usually endorsed or regulated by the jurisdiction.

I am in the USA, so in North America the boiler design code is the ASME -American Society of Mechanical Engineers- traditionally known as the BPV Code -Boiler and Pressure Vessel Code.

Murphy

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Saturday, August 04, 2018   By: cmolanes@itba.edu.ar [50] 4 Stars
I would only add to what Mr. Murphy already commented that the Asme code is a reference not only in USA but internationally, and many local regulations in practice adhere to ASME.

As you most surely know, the pressure limit is related mostly to decide if the boiler is to be subcritical or supercritical, in the first case drum pressures will be around 195 bar and if supercritical, something around or above 250 bar.

In this choice, there are several considerations concerning operation and maintenance, and I cannot afford any idea because I do not have any experience with supercritical boilers, but as it is a very interesting subject, I am sure soon others will comment. Unfortunately, Mr. Victor Ganapathy, an expert in boilers and combustion, is since long absent from this forum.

Claudio Molanes

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