Final answer:
Threaded joints should be avoided in any service where leakage or vibrations are a concern. Alternative jointing methods such as welding or flanged connections are often preferred.
Step-by-step explanation:
Threaded joints should be avoided in any service where leakage or vibrations are a concern. Threaded joints are commonly used in plumbing systems and industrial applications, but they may not provide a reliable seal or withstand high levels of vibration.
For example, in a plumbing system where water leakage could lead to damage or contamination, threaded joints may not provide a tight seal, resulting in leaks. Additionally, in applications where there is significant machinery or equipment vibration, threaded joints may loosen over time, leading to potential equipment failure.
In these situations, alternative jointing methods such as welding or flanged connections are often preferred. Welding creates a strong, permanent bond between the two pieces, while flanged connections use a gasket to ensure a tight seal and allow for easy disassembly if needed.