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Anonymous Poster	Metallurgy 05/01/2010 2:03 AM
	I understand that the main difference between P9 and P91 is that of little vanadium. For our Crude unit, atmospheric heaters are of P5 and vacuum heaters are of P 9 metallurgy. For en emergency shall we use one tube length of P91 instead of P9, if used any implication. The temperature in heater during normal opeartion is in the order of 450 to 500 deg C
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Milo Guru Join Date: Jul 2006 Location: "Dancing over the abyss." Posts: 4884 Good Answers: 243	#1 Re: Metallurgy 05/01/2010 7:05 PM
	http://tinyurl.com/23esv3f Milo __________________ People say between two opposed opinions the truth lies in the middle. Not at all! Between them lies the problem, what is unseeable,eternally active life, contemplated in repose. Goethe
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