New York Low Pressure Boiler COF Practice

What is the primary function of expansion joints in a boiler system?

1. To regulate boiler pressure

2. To prevent leaks

3. To accommodate movement due to thermal expansion

4. To increase efficiency

The correct answer is: To accommodate movement due to thermal expansion

The primary function of expansion joints in a boiler system is to accommodate movement due to thermal expansion. As the boiler heats up, the metal components expand, and without a means to absorb this movement, stresses can develop in the system that may lead to structural failure or damage. Expansion joints provide the necessary flexibility to allow for these changes in size, reducing the risk of cracking, misalignment, or other forms of mechanical stress. By integrating expansion joints, the boiler system can operate more effectively, ensuring that the components can move freely in response to temperature changes. This not only extends the life of the boiler but also helps maintain efficiency by preventing leaks and preserving the integrity of the system's pressure containment. Thus, ensuring proper accommodation of thermal movement is key to the long-term operation and safety of the boiler.