May 16, 2015

Long Term Protection of a Heat Exchanger

Working at high temperatures and pressures and in hostile conditions, heat exchangers – a vital element in the production of chemicals and petrochemicals – are subject to high levels of wear and tear.  A global leader in nitrogen fertilizer manufacturing and distribution, contracted Corroserve to recondition and recoat a heat exchanger, taken out of production at its Cheshire facility.

Working at high temperatures and pressures and in hostile conditions, heat exchangers – a vital element in the production of chemicals and petrochemicals – are subject to high levels of wear and tear.  A global leader in nitrogen fertilizer manufacturing and distribution, contracted Corroserve to recondition and recoat a heat exchanger, taken out of production at its Cheshire facility.

 

Carried out at the Leeds factory, the Corroserve reconditioning contract comprised: blast cleaning all surfaces to ISO 8501-1 cleanliness standard Sa2.5 in accordance with our standard procedures.

 

After a visual inspection of the heat exchanges and plates to assess condition, they were recoated with Corroglass 600 Series to a min.dft of 1.5mm. This high performance lining offers high resistance to the aggressive service conditions the heat exchanger will have to cope with.

 

All coated surfaces spark tested to 19Kv Hv-AC. to ensure there were no pinholes or flaws.

 

Corroserve was awarded the contract based on its ability to complete the work quickly and to high standards. Said a spokesman for the client: “Without a thorough service and recoating from a reputable contractor, unplanned and costly downtime due to heat exchanger failure can result.  Corroserve has restored our heat exchanger to peak performance and extended its useful working life by many years.

Round the clock working ensures fast turnaround on pipework contract

 

As part of an ongoing maintenance program to eliminate unpredicted downtime at a nuclear power station, Corroserve was contracted to corrosion protect 28 off 18” diameter pipes. The pipes had recently been coated by others, but due to pin holes and uneven coating thicknesses, they had not met the high standards required by this industry and Corroserve was asked to remedy the situation. A quick delivery was critical – an immediate turnaround was required.

 

Working in conjunction with the client’s engineering contractor, and after blast cleaning, the following coatings were selected and applied at our Leeds factory:

 

The internal surfaces were coated with Corroglass 600 Series to a min.dft of 1500 microns and the external surfaces coated with…. ????…..? This high performance lining combination offers high resistance to the aggressive service conditions encountered in the power generation industry.

 

The coatings were then thickness checked and spark test to 19Kv Hv-AC to ensure there were no pinholes or flaws.

 

Corroserve was awarded the contract based on its ability to complete the work quickly and meet tight technical requirements. By working round the clock, the pipes were returned to site ahead of schedule and passed all the client’s stringent quality checks.

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