New York Low Pressure Boiler COF Practice

What type of joint is commonly used for connecting pipes to a boiler?

1. Weld joint

2. Flanged joint

3. Solder joint

4. Compression joint

The correct answer is: Flanged joint

A flanged joint is commonly used for connecting pipes to a boiler because it provides a secure and leak-proof connection that can easily be disassembled for maintenance or inspections. Flanged joints consist of two flanges, one on the pipe and one on the boiler, which are bolted together. This design allows for a larger surface area to bear the load and also accommodates any thermal expansion or contraction that may occur. Moreover, flanged joints can handle high pressures and temperatures, making them suitable for boiler applications where these factors are critical. This connection type is standardized and is readily available in various materials and sizes to match different requirements in the system. While other types of joints, such as solder, compression, or weld joints, have their specific uses, flanged joints are favored in boiler installations due to their robustness and versatility.