During hydrostatic testing of an exchanger, which information is essential to determine the test procedure?

• A. The serial number
• B. The correct test pressure
• C. The material grade
• D. The color code

Answer: (B)

Test pressure is the essential piece of information for planning a hydrostatic test. The procedure is built around a defined pressure that comes from the exchanger’s design pressure and the governing codes, which specify how much overpressure is allowed and how long the test must hold. This pressure sets how you apply and monitor the test, ensuring leaks are revealed without risking damage. Other details like serial number, material grade, and color code matter for identification, material compatibility, and labeling, but they don’t determine the test procedure itself.