[Mrityunjay Singh]

Why steam purge type of isolation valves are required for the heater charge pump? What is the operating temperature of your pump? In normal cases the charge pumps are operated in the range of  300 to 370 deg C, which is not the coking temperature of the feed. We are using normal gate valves for isolation of our charge pump in our units since last several years without any problem.

[Mrityunjay Singh]

I am a gradute engineer & working in Coker operation for last 9 years, eight years as  shift-in-charge and one year as plant-in-charge in one of the refinery own by Indian Oil Corporation Limited, India. I have commissioning experience of two of its delayed Coker units, one revamped Coker and other is the newly commissioned licenced by ABB Lummus. Beside this I have done a number of startup and shutdown activities and supervised during normal operation, equipment hand over for maintenace & emergency handling. I am internal and external faculty for Coker operation, startup / shutdown of delayed Coker and emergency handling of Coker operation in Indian Oil.

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