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furnace tube bluged

furnace tube bluged

(OP)
What will be the possible cause for Furnace tube "BLUGED"?

RE: furnace tube bluged

Too high local temperatures cause the tube's metal to become plastic and internal pressure results in so-called high-temperature creep causing the tube to expand and bulge.

RE: furnace tube bluged

What is the product?

RE: furnace tube bluged

(OP)
The product are Crude oil

RE: furnace tube bluged

Assuming that the furnace involved is in the Crude or Vacuum Crude unit, See 25362 comments. Also check chemistry of tube to assure correct alloy.

RE: furnace tube bluged

Though agree fully with 25362& weldstan.

But please do check /analyze data of crude flow through the tube as if for any reasons minimum cooling media flow was not ensured at all times through operation(by mistake or intentionally; which usually results in starvation/ localized hot spots),

then adequate controls and stringent operating practices need to be in place to eradicate recurrence possibilities.

Best Regards
Qalander(Chem)

RE: furnace tube bluged

I came across a situation several years ago on a high pressure firetube boiler. The problem was that the heat exchanger that was heating up the bunker C oil developed a leak and the oil seeped into the water space of the boiler and nicely coated the furnace; amazingly, the check valves did not stop the reverse flow of the bunker C oil into the boiler. I don't remember if the furnace was corrugated or plain but being a high pressure boiler, it was probably corrugated. A new boiler was purchased instead of an expensive repair.

RE: furnace tube bluged

Sometimes the resonance on the tubes in addition the creep can cause bulge. However this type failure should start with noise in the furnace that you may/may not hear.

RE: furnace tube bluged

Flame impingment and coke build up can be one of the possible causes for a bulged tube.

regards

luis Marques

RE: furnace tube bluged

if you use an infrared camera , you can find the bulged area.

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