[bsudhakar]

Hello,
As you mentioned correctly, Creep is one of the contributor to Furnace tube failure. But many other operating causes like flame impingement, burner tip choking, wrong draft profile from radiation floor to convection outlet, delay in furnace tube decoking/pigging, abnormal skin temperature rise, proportion of Fuel oil in the Total fuel fired etc. are significant contributors particularly with time.

[bsudhakar]

Hello,
It is not just the numbers that matter. For maintaining inventory or to take care of re-order levels, these numbers might serve well. Any sincere optimization efforts can cut it down by at least 50%.This is not only a Opex (Operating expenses) saver but will mitigate downstream unit difficulties with silicone chemistry. Real optimization requires monitoring of coke, heavy oil, water, vapor phase Levels on a continuous basis on DCS screen and concomitant actions in field(like calibration of metering pumps, calibration of instruments, timely operator actions – when to start/stop AF dosing pumps at what dosage rate etc.)

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