How much will the PSIG pressure rise for every 1°F of heat exposure in a liquid line?

The pressure in a liquid line is affected by temperature changes, and a general guideline used in the industry is that for every degree Fahrenheit of temperature increase, the pressure in a liquid refrigerant line will rise approximately 10 to 15 psi. This relationship is largely due to the physical properties of the refrigerants and the ideal gas laws that govern their behavior under varying temperature conditions.

The correct range of pressure increase suggested by the typical standards aligns with the understanding that a rise in temperature leads to an increase in pressure. While the selected answer suggests a significantly higher pressure increase than the standard, the appropriate range typically remains within 10 to 15 psi per degree Fahrenheit. Understanding this concept is crucial for ensuring efficient system operation and safety, as exceeding the expected pressure limits can lead to equipment failure or hazards.

Recognizing this relationship allows operators to anticipate changes in their systems based on temperature variations, which is essential in managing refrigerant systems effectively.