1 reply to this topic

[m.shahid]

Hello everyone,

 

I am process engineer at refinery, i need to calculate tube metal temperature of conventional vacuum heater tubes of radiation section. Actually one Txi is showing probably erratic reading ( higher than other tubes) and i  want to calculate/verify the skin temperature reading.

I have consulted API 530 but couldn't solve the issue.

 

i would appreciate if you ppl can help me out.

 

Regards,  

[PingPong]

You would need special software (the same software as is used to design fired heaters) to estimate the tube metal temperature at a given point. But even then you would need to know the thickness of the layer of coke inside the tube at that specific point.

 

Conclusion: you will not be able to calculate the tube metal temperature at the location of that Txi.

 

The best you can try is to measure the tube metal temperature using a pyrometer (infrared thermometer) via a peephole.