White paper reveals the dangers of carbon residue 19 August 2014

Heat transfer fluid specialist Global Heat Transfer has published a white paper warning industry of the impact of carbon residue on plant ageing and effectiveness.

Dr Chris Wright, head of R&D at Global Heat Transfer, describes best practice for maintenance and illustrates the health warnings that help diagnose problems with heat transfer systems and thermal fluids.

The paper also discusses a typical case of system malfunction where, although the maintenance procedures were followed, laboratory tests and data analysis revealed additional problems.

Dr Wright urges manufacturers to pay attention to signs of overheating and thermal cracking. Performing the necessary tests, he says, as well as enlisting maintenance help from a reputable thermal fluid specialist, can save money in the long run and help avoid accidents.

"In my experience even plant operators that proactively look after the safety and health of their systems can find they have issues that require expert advice," states Wright.

"Carbon residue, also known as coke, is the biggest offender when it comes to system safety. It can lead to fouling and eventually carbon deposits chocked pipes, creating a fire hazard," he continues.

"Ideally, action should be taken when the carbon residue level is between 0.75 and 1.00% of total fluid weight. At this level, maintenance consists of flushing and replenishing the fluids."

Anything above that level will need aggressive cleaning, which may well involve significant plant downtime, he says.

To download the paper, use the link below.

Brian Tinham

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Global Heat Transfer Ltd

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