Wire spring turbulators

Extract the wire spring turbulators from the tubes, but without any success. That is, the springs were stuck. 

In a used motor oil reprocessing facility, the vacuum tower precondenser consisted of a large fin-fan air cooler. Inlet conditions were 260°F and 80 mm Hg. Due to the contaminants in the used motor oil, this is a potentially very fouling service. Tube inserts, called turbulators (basically wire springs), were installed in the firmed tubes by the manufacturer. The initial performance was reported by our client to be good. However,... 

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