Final answer:
Low operating temperatures can cause chilling effects on highly volatile fluids or alloy piping, especially when proper post-weld heat treatment is not performed after welding.
Step-by-step explanation:
Low operating temperatures can cause various effects, including the chilling effect on highly volatile fluids or in alloy piping. When proper post-weld heat treatment is not performed after welding, there can be a sudden loss of pressure, which can further contribute to the impact of low operating temperatures. For example, highly volatile fluids may experience drastic changes in their physical properties, leading to potential damage or failure.