Fabrication

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dinakarj Commentator Join Date: Mar 2009 Posts: 56	Fabrication 04/11/2009 1:42 AM
	In order to make a tank of diameter 2520 mm the length given in my drawing is 7870mm.Is this correct or not.
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2tinker Power-User Join Date: Nov 2006 Location: San Francisco Bay area Posts: 212 Good Answers: 15	#1 Re: Fabrication 04/11/2009 1:56 AM
	No __________________ I like 2 tinker-no, really!
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Hendrik Guru Join Date: Jan 2007 Location: Centurion, South Africa Posts: 3921 Good Answers: 97	#2 Re: Fabrication 04/11/2009 2:24 AM
	the 7870 may be correct. If 7870 is divided by pi you get 2505 which is only 15 mm smaller than 2520. What is the thickness of your material? Is the 2520 inside or outside diam of the tank? __________________ Never do today what you can put of until tomorrow - Student motto
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sb Guru Join Date: Mar 2007 Posts: 2550 Good Answers: 103	#3 In reply to #2 Re: Fabrication 04/11/2009 3:15 AM
	If the plate thickness >= 30mm then correct. However no allowance will be there. As hendrik has correctly calculated - the diffce is 14.90mm The rolling (mid point) diameter for this plate will be 2505mm and thus a 30mm plate will just get the OD of 2520 but not the ID. __________________ Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
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Anonymous Poster	#4 In reply to #3 Re: Fabrication 04/11/2009 3:29 AM
	I don;t know - does rolling stretch plate too?
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sb Guru Join Date: Mar 2007 Posts: 2550 Good Answers: 103	#5 In reply to #4 Re: Fabrication 04/11/2009 3:50 AM
	Yes they do, on OD and the ID is under compression. __________________ Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
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dinakarj Commentator Join Date: Mar 2009 Posts: 56	#8 In reply to #2 Re: Fabrication 04/13/2009 4:17 AM
	My Plate thickness line is 15mm
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pipewelder Guru Join Date: Apr 2007 Location: North Georgia, USA Posts: 671 Good Answers: 33	#6 Re: Fabrication 04/12/2009 8:00 AM
	I would add an extra 2% to the length dimension. You can cut the length off allot easier than you can weld a piece on after you get in the field. __________________ pipewelder
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Doogleass Power-User Join Date: Sep 2006 Posts: 186 Good Answers: 22	#7 Re: Fabrication 04/12/2009 11:52 AM
	Depending on the type of roller you are using, you may need to allow for the "initial pinch" flat spot that results from getting the sheet started into the roller assembly. As the previous poster pointed out, it is easier to trim than add.
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2tinker (1); Anonymous Poster (1); dinakarj (1); Doogleass (1); Hendrik (1); pipewelder (1); sb (2)

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