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Clean-In-Place Pillar 1: Temperature

It is important to note that CIP temperatures are monitored and tracked on the CIP circuit return header to ensure that the entire system is fully heated.Cavitation from essentially uncontrolled boiling can occur at pump intakes, making the system more hazardous

to operators.Unintended phase changes between steam and condensate also create a carbonic acid that attacks the pipe wall and decreases the useful life of a pipe.The water instantly changes to a superheat steam with even higher internal energy

(entropy), which can cause damage to the surrounding equipment, structures and personnel.Obtaining and sustaining higher temperatures makes the CIP process more expensive and fundamentally more dangerous.This may be true from the perspective of some application sciences, but as a system approaches it's boiling point, other issues arise.Higher temperatures mean the system contains more internal energy, enthalpy and entropy.Typically CIP systems operate at approximately 140?F-180?F.If pressure decreases in the circuit, this water will flash into steam causing hammer in your piping system.Moving more heat into a CIP system creates a higher temperature.Not necessarily...

Clean-In-Place Pillar 1: Temperature

It is important to note that CIP temperatures are monitored and tracked on the CIP circuit return header to ensure that the entire system is fully heated. Typically CIP systems operate at approximately 140°F-180°F. That means the temperature on the source header coming out of the CIP is even higher. Temperature should be considered carefully when designing a system.

Moving more heat into a CIP system creates a higher temperature. Higher temperatures equal greater solubility, and therefore more cleaning power. So, is hotter better? Not necessarily...

This may be true from the perspective of some application sciences, but as a system approaches it's boiling point, other issues arise. Cavitation from essentially uncontrolled boiling can occur at pump intakes, making the system more hazardous

to operators. Boiling is a function of pressure. It is well known that water will turn into steam in an

open pot at atmospheric pressure when the temperature reaches 212°F. But, water at 80psi remains a liquid all the way up to a temperature of 312°F.

If pressure decreases in the circuit, this water will flash into steam causing hammer in your piping system. Unintended phase changes between steam and condensate also create a carbonic acid that attacks the pipe wall and decreases the useful life of a pipe.

Higher temperatures mean the system contains more internal energy, enthalpy and entropy. Let's go back to that liquid under pressure at 80psi and at 312°F. If the piping system carrying this develops a hole or leak, the liquid can escape at atmospheric pressure.

The water instantly changes to a superheat steam with even higher internal energy

(entropy), which can cause damage to the surrounding equipment, structures and personnel. Injuries from steam at a given temperature are more severe than injuries from water at the same temperature because the internal energy of steam is higher. Obtaining and sustaining higher temperatures makes the CIP process more expensive and fundamentally more dangerous.

At InterTech, we manage the clean-in-place system design by creating only enough

heat to properly clean the system.