Gaskets for O2 Line

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b v rao Power-User Join Date: Feb 2009 Location: India Posts: 155	Gaskets for O2 Line 07/22/2009 4:39 AM
	What is the recommended thickness of the gasket and material for oxygen line of about 20bar pressure with temperature of about 140 deg c. Line size upto 200mm. I was thinking of using SS gasket with filler. But these are available with minimum thickness of 3 to 4.5mm. Normally thinner gaskets are used for gas lines, I remember.
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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: GASKETS FOR O2 LINE 07/22/2009 4:44 AM
	What material is the pipework made from? __________________ "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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b v rao Power-User Join Date: Feb 2009 Location: India Posts: 155	#2 In reply to #1 Re: GASKETS FOR O2 LINE 07/22/2009 4:56 AM
	SS 316L
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atorroja Associate Join Date: Mar 2009 Posts: 46	#3 Re: Gaskets for O2 Line 07/27/2009 2:42 AM
	My friend you have a very nice troubble. I suggest not to use flanges, as possible, try butt welds, and fast connections at the line end.
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b v rao Power-User Join Date: Feb 2009 Location: India Posts: 155	#4 In reply to #3 Re: Gaskets for O2 Line 07/27/2009 11:26 PM
	Yes All line joints are of BW. Only flanged valves and terminals require gaskets.
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sceptic Guru Join Date: Oct 2008 Location: Cairns, Qld, Australia Posts: 968 Good Answers: 65	#5 Re: Gaskets for O2 Line 07/28/2009 2:51 AM
	I would be inclined to use glass filed PTFE. Thickness depends on the quality of the machining of your flanges.
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b v rao Power-User Join Date: Feb 2009 Location: India Posts: 155	#6 In reply to #5 Re: Gaskets for O2 Line 07/28/2009 4:34 AM
	I have finally decided to go for 1.6mm teflon gasket.
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sceptic Guru Join Date: Oct 2008 Location: Cairns, Qld, Australia Posts: 968 Good Answers: 65	#7 In reply to #6 Re: Gaskets for O2 Line 07/28/2009 6:53 AM
	Suggest you use glass filled PTFE to reduce creep, especially at the temp you could be using.
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b v rao Power-User Join Date: Feb 2009 Location: India Posts: 155	#8 In reply to #7 Re: Gaskets for O2 Line 07/28/2009 11:43 PM
	what is this glass filled PTFE? Does not the powdered glass damage the PTFE in compression?
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sceptic Guru Join Date: Oct 2008 Location: Cairns, Qld, Australia Posts: 968 Good Answers: 65	#9 In reply to #8 Re: Gaskets for O2 Line 07/29/2009 4:16 AM
	No but it reduces creep and significantly increases strength.
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atorroja (1); b v rao (4); PWSlack (1); sceptic (3)

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