Final answer:
Slip-on flanges should be avoided where large temperature cycles are expected, as they may fail due to thermal expansion and contraction.
Step-by-step explanation:
The use of slip-on flanges should be avoided where many large temperature cycles are expected, particularly if the flanges are not insulated. Slip-on flanges can become loose due to the expansion and contraction associated with temperature fluctuations, causing leaks or flange failure. In such applications, more robust flange types, such as welded neck flanges, are recommended as they provide a stronger, more reliable seal. When designing a system that will undergo large temperature cycles, engineers must consider thermal expansion and select flanges that can withstand the stress to ensure system safety and integrity.