BS 2790 Welded Shell Boiler

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ADIBA NASIR Associate Join Date: Sep 2012 Location: Pakistan,Lhr Posts: 36	BS 2790 Welded Shell Boiler 08/29/2013 8:01 AM
	As per BS 2790 (Design and manufacture of shell boilers of welded construction), Design for gusset stays as per clause 3.8.8.3 , the angle V must not less than 60 degrees and shall be arranged radiually along tube sheet within angle 15 to 30 degree b/w stays. My question is how to calculate the QUANTITY of gusset stays to end plate. The one thing in my mind is just make tubesheet layout and allow some breathing space, after that place the gusset stays as given/selected angles as per code, and quantity will be as permitted by tubes layout ( tubes bundle not intercepted). It doesn't look strong reason to me, kindly help. Greetings __________________ Engineering problems are under-defined, there are many solutions, good, bad and indifferent. The art is to arrive at a good solution.
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#1 Re: BS 2790 Welded Shell Boiler 08/29/2013 9:29 AM
	So long as the individual angles and the total angle satisfy the given criteria, I think you are at liberty to select the number. A smaller boiler could use fewer gussets, so that there is enough space between them for ease of welding. I don't know if BS 2790 says, but the gusset thickness would probably be proportionate to the shell thickness. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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safridi Participant Join Date: Sep 2015 Posts: 1	#2 Re: BS 2790 Welded Shell Boiler 09/16/2015 3:14 PM
	The answer is in the Factor "F" used in the formula of 3.8.8.3. roughly calculate the area supported by a gusset in mm2 and multiply it by the design pressure N/mm2 you will get F. the total unsupported area divided by the area you assumed or calculated per gusset will give you the number of gussets required. the area supported per gusset may over lap but care should be taken that all unsupported area is considered. I hope I explained it as easily as posible if still have some confusion you can ask.
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