Flange Manufacturing

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nbhide108 Commentator Join Date: Apr 2009 Posts: 67	Flange Manufacturing 07/06/2009 9:42 AM
	For saving material & machining cost is it possible to manufacture a flange by rolling a flat? Is it acceptable as per ASME CODE? If yes what are the additional test required? (eg. full radiography as flange has welded joints etc.) If no, why?
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XMech Power-User Join Date: Jan 2009 Location: Western Canada Posts: 295 Good Answers: 51	#1 Re: Flange Manufacturing 07/06/2009 12:40 PM
	Yes, it is permissible - see following interpretation: ********************** Interpretation: VIII-1-92-220 Subject: Section VIII, Division 1 (1992 Edition, 1993 Addenda); Appendix 2 Date Issued: May 24, 1994 File: BC94-109 Question(1): Is it permissible under the requirements of Appendix 2 in Section VIII, Division 1 to fabricate a flange by rolling a plate strip and welding the ends, with a full penetration double butt weld, if the requirements under UCS-79, UCS-56, UCS-57, and 2-2 are met? Reply (1): Yes. Question (2): Is it permissible to locate a bolt hole in the weld of the flange, as described in Question (1)? Reply 2: Yes. ******************* __________________ A little knowledge is a dangerous thing.
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gsuhas Guru Join Date: Dec 2007 Location: 18 29 N 73 57E Posts: 1390 Good Answers: 31	#2 In reply to #1 Re: Flange Manufacturing 07/06/2009 11:12 PM
	It is permited in not more than 4 segments of rolled plate. (Please correct if I am not right). (At this movement I can not spare time to find the reference and quote it... This is what I remember)
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XMech Power-User Join Date: Jan 2009 Location: Western Canada Posts: 295 Good Answers: 51	#3 In reply to #2 Re: Flange Manufacturing 07/07/2009 12:35 AM
	I can't comment/confirm that right now, other than - that would be a big flange, assuming appropriate length bars/flats were originally used. __________________ A little knowledge is a dangerous thing.
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vidyadhar deodhar Commentator Join Date: Apr 2007 Location: DOMBIVLI,MUMBAI SUBARB, MAHARASHTRA,INDIA. Posts: 77	#4 Re: Flange Manufacturing 07/07/2009 12:57 AM
	Dear sir, you are asking the flange mnufacture as per which standard and type of flange? ASME B16.5 then refer new relise ASME B16.5-2009. Thank you.
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Abdel Halim Galala Guru Join Date: Feb 2007 Location: Cairo, Egypt Posts: 1733 Good Answers: 248	#5 In reply to #4 Re: Flange Manufacturing 07/07/2009 1:33 AM
	You are right vidyadhar deodhar, and good answer XMech. And I'd like to add that when we say ASME B16.5/ASME B16.47, we mean standard flanges where the flange is formed from only one piece and manufactured by forging (without any weldment). In addition to that, the code accepts to fabricate a non-standard flanges but must be accompanying with a full design calculations (10 pages at least) to meet all the code requirements. __________________ It is better to be defeated on principles, than to win on lies!
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