Sight Glass Fitting - CR4 Discussion Thread

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eng.kaveh.eslami Participant Join Date: Oct 2011 Posts: 4	Sight Glass Fitting 08/22/2012 3:18 AM
	I want to weld a rectangular sight glass to a pressure vessel . I need some information & calculation for welding (reinforcement) pad design. -thank you-
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: sight glass fitting 08/22/2012 4:40 AM
	Good luck. Sight glasses are more often circular so as not to leave "stress raisers" at the corners of a rectangle. Background reading on the Comet Airliner is recommended. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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eng.kaveh.eslami Participant Join Date: Oct 2011 Posts: 4	#2 In reply to #1 Re: sight glass fitting 08/22/2012 5:26 AM
	IF you can help with the circular sight glasses it will be useful too . - thank you -
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#3 In reply to #2 Re: sight glass fitting 08/22/2012 6:49 AM
	One minute it is rectangular, the next it is circular. What on earth is going on? Welding onto an existing pressure vessel invalidates its pressure test certificate, so it will need to be fully re-tested afterwards, which will involve a witness test by the Engineer/Surveyor fromt he company providing burst indemnity insurance. Open a dialogue with that individual before doing anything. Why is there a sudden need for a sight glass that was not considered necessary at the design stage for this vessel? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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durtieduck Guru Join Date: Jan 2011 Posts: 668 Good Answers: 3	#4 Re: Sight Glass Fitting 08/23/2012 6:25 AM
	most welders will know what's needed. it's 101 welding. weld a extention from to the vessel first, then screw the sight glass into the extention after everything cools.
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grandmfg Member Join Date: Apr 2014 Location: Taizhou,Zhejiang,317605,China Posts: 5	#5 Re: Sight Glass Fitting 04/19/2014 4:06 AM
	Most of sight glass have thread for screw into the equipements
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Users who posted comments:

durtieduck (1); eng.kaveh.eslami (1); grandmfg (1); PWSlack (2)

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