Pitting & bending of Sulphur Gun Spray Nozzle Assembly - CR4 Discussion Thread

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jayant_pat77717 Participant Join Date: Oct 2007 Posts: 1	Pitting & bending of Sulphur Gun Spray Nozzle Assembly 10/19/2007 6:27 AM
	Sulphur Gun is used in Sulfur Burner of Sulphuric Acid Plants. Temp is 1200 deg C. Pitting occured at the opposite end of the nozzle after 2 1/2 years of operation ( normal life is 5 years ). The outside pipe is of S.S 304, size 76 mm OD x 2.5 mm thk. Length of Gun is 2100 mm. It is interesting to note that same gun of above size & specifications ( except outside pipe of S.S 310 ) is performing very well. What are the likely causes of failure? Please reply soon, as we are required to replace the gun after giving satisfactory reply to our client.
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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: Pitting & bending of Sulphur Gun Spray Nozzle Assembly 10/19/2007 7:25 AM
	Look at the composition of 310 and 304, and see if there are differences between them that would explain a heightened attack rate from H₂SO₄. __________________ "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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Keith E Bowers Power-User Join Date: Jan 2007 Location: Houston,Texas Posts: 378 Good Answers: 24	#2 Re: Pitting & bending of Sulphur Gun Spray Nozzle Assembly 10/20/2007 3:51 PM
	SS 304 is not suitable for that service. It does not have enough chrome to resist the highly oxidizing conditions. SS 310 would be marginal. Monel much better. __________________ Keith E Bowers, PMP
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NiCrMoNoMore Power-User Join Date: Sep 2007 Posts: 303 Good Answers: 5	#4 In reply to #2 Re: Pitting & bending of Sulphur Gun Spray Nozzle Assembly 10/23/2007 9:13 AM
	Better yet! I have been experimenting using a copper, tungsten, nickel alloy that performs very well at elevated temperatures. There are also some composite alloys out now that do not rely on forming films in order to protect itself against corrosion. __________________ "I had not anticipated that the work would present any great difficulites" SHACKLETON
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ruchakent Participant Join Date: Sep 2006 Posts: 4	#3 Re: Pitting & bending of Sulphur Gun Spray Nozzle Assembly 10/20/2007 4:22 PM
	Dear Jayant, If your a manufacturer or user of Suphuric Acid then please contact us for your requirement of transfer pumps. Jayesh Shah Ruchak Enterprise +91-79-66610013 +91-98250 34887 ruchakent@hotmail.com
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Users who posted comments:

Keith E Bowers (1); NiCrMoNoMore (1); PWSlack (1); ruchakent (1)

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