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HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...corrosion in SS316L HE with chlorobenzene at 142%C2°Ccorrosion in SS316L HE with chlorobenzene at 142%C2°C
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3/23/2006 9:00 AM
 
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Kindly suggest us on our problem of leakages in tubes of vapor condenser which have following process conditions. This exchanger is used for a heat exchange between 23% PC solution & Chlorobenzene vapors. PC solution is on tube side, chlorobenzene vapors on the shell side. Comp Tube Tube Shell Shell (Wt %) (In) (Out) (In) (Out) Water 0.008 0.008 0.009 0.001 MC 3.249 3.249 0.769 0.582 CB 73.483 73.483 99.222 99.417 PC 23.260 23.260 0.000 0.000 Temp(%C2°C) 127.7 132.7 142.4 139.7 Press(bar) 9.6 9.5 1.4 1.4 State liquid liquid vapor liquid MOC on both the sides of heat exchanger is SS316L.Chlorobe nzene(99.222%)with0.769% methylene chloride vapors on shell side at 142.4%C2°C.Can we justify the use of SS316L. Kindly advise what can be done to avoid the leakage as more than 3% of the total tubes have started leaking after 1 year of exchanger operation. NB:PC=polycarbonate,MC=methylene chloride,CB=chlorobenzene Is there any study to check the life of heat exchanger after studyng its present conditions?
 
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3/26/2006 9:00 AM
 
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EK55 / Shailesh For the service temp / concentration of cholrobenzene ( described by you on Mar 25 and ek_55 in the earlier mail - Mar 23 ) unalloyed Ti / Ta or alloyed Ti with Pd would give better service as MOC. 316 L will pit and also develop SCC in cholorobenzene at this service temperature. Your leakage and SCC problem may get solved with change of material to Ti heat exchanger even with this design. Not sure how many heat exchanger manufacturers are equipped to supply plate type Ti *unalloyed or alloyed with Ti-Pd". Plate type Ti heat exchanger design and fabrication would cost much more than conventional tube exchanger tubes and tube sheet. Trust this is of help to you. C.V.Srinivasan Nishi Engineers Pvt Ltd India Mar 26,2006 E-mail: nishi@vsnl.com >Kindly suggest us on our problem of leakages in tubes of >vapor >condenser which have following process conditions. >This exchanger is used for a heat exchange between 23% PC >solution & Chlorobenzene vapors. PC solution is on tube >side, chlorobenzene vapors on the shell side. > >Comp Tube Tube >Shell Shell >(Wt %) (In) (Out) >(In) (Out) >Water 0.008 0.008 0.009 > 0.001 >MC 3.249 3.249 >0.769 0.582 >CB 73.483 73.483 99.222 > 99.417 >PC 23.260 23.260 0.000 > 0.000 >Temp(%C2°C) 127.7 132.7 142.4 > 139.7 >Press(bar) 9.6 9.5 >1.4 1.4 >State liquid liquid > vapor liquid > >MOC on both the sides of heat exchanger is SS316L.Chlorobe >nzene(99.222%)with0.769% methylene chloride vapors on >shell side at 142.4%C2°C.Can we justify the use of SS316L. >Kindly advise what can be done to avoid the leakage as more >than 3% of the total tubes have started leaking after 1 year >of exchanger operation. >NB:PC=polycarbonate,MC=methylene chloride,CB=chlorobenzene >Is there any study to check the life of heat exchanger after >studyng its present conditions?
 
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7/25/2007 9:00 AM
 
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You can calorise ss316 to get better life and we will be able to do the calorising for you
 
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HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...corrosion in SS316L HE with chlorobenzene at 142%C2°Ccorrosion in SS316L HE with chlorobenzene at 142%C2°C


  

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