What preparation must be made for the Spring-Can hangers of a section of a pipe before hydro testing can be performed?

• A. No preparations must be made
• B. Bolts must be tightened
• C. Hangers must be removed
• D. Insulation installed

Answer: (A)

Hydro testing checks the pipe and its joints for leaks and strength under the test pressure, using the system in its installed condition. Spring-can hangers are flexible supports that carry the pipe and allow movement during pressure changes, so they don’t affect the containment path or leak checks. Because of that, no special preparation of the hangers is needed before the test. Altering hangers—like tightening bolts, removing supports, or adding insulation specifically for the test—could change how the pipe is supported and influence test results, so they aren’t required.