FAILURE OF 'K' TYPE THEMOCOUPLE

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Anonymous Poster	FAILURE OF 'K' TYPE THEMOCOUPLE 01/26/2008 2:14 AM
	WE ARE USING 'K' TYPE THERMOCOUPLE IN OUR CEMENT LANT FOR TEMP MEASUREMENT UP TO 1000 DEG. CENT.THE SPECIFICATION OF T/C IS AS UNDER. INNER SEATH :MI CABLE WITH 6 MM DIA IS MADE OF SS310 OUTER PROTECTION SEATH : 22 MM OD/14 MM ID HRS 446 METAL LENGTH: 1000 MM APPLICATION:IN CEMENT PLANT CALCINER INLET TEMP. HAVING OPERATING TEMP. IS 870 TO 950 DEGREE CENT.SOME TIMRS IT GOES TO 1000 DEG.CENT. LIFE WE ARE GETING IS: AROUND 15 TO 20 DAYS. PLEASE GIVE YOUR SUGGESTIONS FOR IMPROVEMENT.
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TVP45 Guru Join Date: Jul 2007 Posts: 4448 Good Answers: 143	#1 Re: FAILURE OF 'K' TYPE THEMOCOUPLE 01/26/2008 7:34 PM
	Oops, thought my post went through and it didn't. Go to www.omega.com and check out their sheaths. Sounds like you might have chloride accelerated corrosion. You may need Inconel or even Carpenter 20. __________________ "Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it." Elwood P. Dowd
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agua_doc Guru Join Date: Dec 2006 Location: Brecksville, OH Posts: 1621 Good Answers: 18	#2 Re: FAILURE OF 'K' TYPE THEMOCOUPLE 01/26/2008 11:29 PM
	May want to consider 446 SS as a thermowell. __________________ "Consensus Science got us into this mess, then why can't it get us out?" : Rephrase of Will Rogers Comment
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ja.sr Participant Join Date: Nov 2007 Location: Mostly Antwerp, Belgium but also all over the world Posts: 1	#3 Re: FAILURE OF 'K' TYPE THEMOCOUPLE 01/27/2008 6:12 PM
	At that temperature I would not recomend a K-type anymore. Go for a N-type with a Nicrosil thermowell. I had good experience in a die decarbonizer/incinerator with oxidizing temperatures over 1000 °C.
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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	#4 Re: FAILURE OF 'K' TYPE THEMOCOUPLE 01/28/2008 6:05 AM
	Please be so kind as to turn off the Caps Lock function. Another option might be to go for a non-contact measurement system, like an laser thermometer. __________________ "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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pappu Active Contributor Join Date: Nov 2007 Location: Mumbai Posts: 23	#5 Re: FAILURE OF 'K' TYPE THEMOCOUPLE 02/03/2008 11:44 AM
	HI, My suggestion is please go for INCONEL 600 Material for inner & outer sheath because specified SS material work upto 800 Deg C only.
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agua_doc (1); ja.sr (1); pappu (1); PWSlack (1); TVP45 (1)

You might be interested in: Cement Boards, Thermocouple Wire, Cement Tiles

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