[chiou]

Dear sir:
I made a mistake. Our DCU HCGO draw tray(op. temperature 360C) material is 410S. And our CDU LGO draw tray(410s, op. temperature 325C) and VDU wash oil draw tray(410s, op. temperature 350C) also have cracks at welds.
Do we need to upgrade the tray material or renew the tray in a period of operation?

[chiou]

Thanks a lot for Mike’s reply

[chiou]

Thanks for Gary’s information!

[chiou]

Thanks a lot for Mike’s reply. It is very worthy to us. We are very concerned about the possible strong odors that could result in exposure to hydrocarbons by the decoking crew or anywhere the coke is moved. So I wonder the drum overhead temperature limit for Stopping the sludge injection and replacing it with quench water.

[chiou]

Dear sir
I am very appreciated for your reply. Our refinery prefer to feed the sludge to DCU coke drum during quench phase of the cycle. Is the temperature limitation >650F for feeding sludge during quench phase? What is iMOSC system? Do you have iMOSC system (know-how,equipment) vendor information so that we can contact.

[Author]

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