During hydrotesting an exchanger, if a tube is leaking, what should the boiler maker use to stop the leak?

Prepare for the NCCR Boilermaker Test. Includes flashcards and multiple-choice questions with hints and detailed explanations to ensure your success. Gear up for your examination!

Multiple Choice

During hydrotesting an exchanger, if a tube is leaking, what should the boiler maker use to stop the leak?

Explanation:
During hydrostatic testing of a heat exchanger, if a tube leaks you need to isolate that tube so the test pressure can be maintained. A tube plug is used because it fits inside the tube and blocks flow from end to end, effectively sealing the leaking tube and allowing the rest of the exchanger to be pressurized and inspected for other leaks. Sealant tape isn’t reliable under hydrotest pressures and temperatures and can fail or contaminate the system. A gasket seals flange joints, not a single tube. A lubricant does not provide a seal and could cause contamination or slipping.

During hydrostatic testing of a heat exchanger, if a tube leaks you need to isolate that tube so the test pressure can be maintained. A tube plug is used because it fits inside the tube and blocks flow from end to end, effectively sealing the leaking tube and allowing the rest of the exchanger to be pressurized and inspected for other leaks.

Sealant tape isn’t reliable under hydrotest pressures and temperatures and can fail or contaminate the system. A gasket seals flange joints, not a single tube. A lubricant does not provide a seal and could cause contamination or slipping.

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