Which of the following statements about piping exposure to heat is true?

• A. Piping Can Deform by Heat Radiation to the Point That It Begins to Leak
• B. Piping Can Expand but Never Leaks
• C. Piping Is Unaffected by Heat Radiation
• D. Piping Leaks Only Under High Pressure

Answer: (A)

When piping is exposed to heat, the material expands and can warp or weaken joints and supports. Radiant heat from a fire raises the pipe’s temperature, causing it to bend, pull away from flanges, or distort coupling areas. This distortion can break seals or misalign connections, making leaks start even if the pipe isn’t otherwise damaged. That’s why the statement about deformation from heat radiation leading to leaks is the best answer.

Piping does expand when heated, but that doesn’t mean leaks won’t occur—expansion can stress seals and joints, causing leaks. Piping is affected by heat radiation; ignoring that effect isn’t accurate. Leaks aren’t confined to high pressure; heat can cause leaks through weakened seals or distorted connections even at normal operating pressures.