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Boiler Drum Steam Header


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#1 premjagan

premjagan

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Posted 01 September 2012 - 03:23 PM

why boiler drum steam header exit line having mostly ON/OFF valve or motor operating valve rather than control valve? any specific reason is there?

Edited by premjagan, 01 September 2012 - 03:24 PM.


#2

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Posted 12 October 2012 - 03:01 PM

Yes,
At least in the US, code requires that boilers have block valves for steam isolation purposes. Control valves are notorious for leaking by, especially with superheated steam..

#3 tarafdar

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Posted 13 October 2012 - 05:03 AM

Hi,

Go through ASME Boiler & Pressure Vessel Code Section 1

B31.1-122.1.7(A),(A1),(A1A)

Thanks




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