Thanks for your interest to my question please find below the history and correct process data of shell and tube of the exchanger:
Shell side:
Temperature (IN) : 68 C (OUT) 283 C
Pressure : 28.5 Kg/Cm2
Dry Composition of gas:
%CH4 0.243
%CO 0.458
%CO2 0.2
%H2 74.55
%N2 24.1...
Due to the leakage from one of gas-gas heat exchangers in our ammonia plant we have faced with shut down of the plant. The exchanger has been in service only two years and the outer surface of the leaked tubes shows sever corrosion however the condition of inner surfaces are good.The material of...
We have a 5000 ton double wall ammonia tank under construction in our plant designed with respect to API620. I would like to know the procedure for hydrostatic and pneumatic test of the tank after comletion of the construction.Is it necessary to check all the weld joints by solution film or it...
We have a lot of experince with respect to use and corrosion of s/s 316 in our nitric acid plant.I advise to use s/s 304L and in severe conditions nitric acid grade (with low c,p,s).
I would like to know how to prevent internal parts of equipments which are not in service for a long time from corrosion.In our plant some of equipments ( towers and coolers )are in two set and in pararel so at a time only one of them is in service and the other will be out of service for a long...
EdStainless,
The faiuled exchanger has been in service in good condition scince one month ago.Ten days later the plant shut downed and the exchenger opened for inspection. During inspection we found that most of the tubes had corroded in inlet and outlet tubesheets.The tubes rolled and expanded...
We would like to use our Argon,N2 and oxygen cylinders for filling CO2 in one of our fire fighting projects. I,d like to know whether we have this permission or not and if there was not any contradiction with standards and safty rules.It is to be informed that all the cylinders will be...
Both exchangers were built and put in service more than nine years ago.They built in the same shop and have identical tubes.Be inform that that these exchanger tubes are in series and the one that have problem is the exchangr with higher rich MEA temperature.The corroded area is only confind to...
I would like to give my thanks to you by the excellent site you have and also by such detailed information.
Leakage from after cooler of air compressor in our power plant led us to shut down the compressor for several times .Visual inspection revealed severe corrosion of copper alloy tubes...
Rich MEA is on the tube side and lean MEA in shell side.Corrosion was in the form of severe pitting.The condition of tubes were good in lean side and the corrosion in rich side confind to the area which the tubes are in tube sheets (in inlet and outlet tube sheet).Material of tubes and...
We have recentely faced with a sever corrosion of Lean/ rich MEA exhanger tubes in our ammonia plant wich led us to shut down of the plant.corrosion of tubes were in rich side and in the area of tubes located in the tube sheet.Tube material was S/S 304.Any comments with respect to the mechnism...
