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avikal81 Participant Join Date: Mar 2010 Posts: 1	p11 03/26/2010 7:58 AM
	what is the difference between p11.31,91 types of materials
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RDGRNR Guru Join Date: Dec 2009 Location: San Antonio, TX USA Posts: 844 Good Answers: 29	#1 Re: p11 03/26/2010 8:22 AM
	Look here. __________________ "Do not worry about your difficulties in Mathematics. I can assure you mine are still greater". - Albert Einstein
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ashfaqanwer Commentator Join Date: Apr 2010 Posts: 66 Good Answers: 1	#2 Re: p11 04/28/2010 6:50 AM
	They are different grades in A-335 "Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service" Go through A-335 to see the difference in Chemical Composition & Mechanical Properties of these three. Regards, Ashfaq Anwer http://forums.thepetrostreet.com
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