CR4 - Thread: Nozzle Neck Thicknesss

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inspectorjoe Active Contributor Join Date: Apr 2008 Posts: 13	Nozzle Neck Thicknesss 05/02/2008 4:56 AM
	We are currently doin a pressure vessel evaluation. How do i compute if the nozzle thickness are still acceptable? I have now the ut readings of the nozles. Is there a formula for computing the minimum allowable thickness?
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Abdel Halim Galala Guru Join Date: Feb 2007 Location: Cairo, Egypt Posts: 746 Good Answers: 40	#1 Re: Nozzle Neck Thicknesss 05/03/2008 4:33 AM
	Min. required nozzle wall thickness, t_rn= PR_n/(S_n E_n - 0.6P) ....... ASME Code, Section VIII, Div. 1 (UG-27) where P = Design Pressure R_n = Nozzle Inside Radius in corroded condition S_n = Allowable Tensile Strength of Pipe Material E_n = Joint Efficiency Please refer to UG-16(d) and (e), UG-27, UG-37 and UG-45. Or you can use the equation : t_rn = PR_on /(S_nE_n + 0.4 P) ......(Appendix 1.1) where R_on = Nozzle Outside Radious

inspectorjoe Active Contributor Join Date: Apr 2008 Posts: 13	#2 In reply to #1 Re: Nozzle Neck Thicknesss 07/28/2008 1:09 AM
	How do i compute for the minimum allowable thickness of a boiler tube sheet?

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