Technical Standards and Safety Authority (TSSA) G3 Practice Exam

Propane piping of 200 ft. (61 m) in length or less operating at a pressure over 2 psig (14 kPa) but not more than 33 psig (230 kPa) shall be tested at a minimum of:

1. 5 psig (34 kPa) for 30 minutes

2. 15 psig (100 kPa) for 15 minutes

3. 15 psig (100 kPa) for 60 minutes

4. 50 psig (340 kPa) for 60 minutes

The correct answer is: 50 psig (340 kPa) for 60 minutes

Testing propane piping is essential to ensure its integrity and safety under operating pressures. For piping that is 200 feet (61 meters) in length or less, operating at a pressure over 2 psig (14 kPa) but not exceeding 33 psig (230 kPa), the regulation calls for testing at a pressure of 50 psig (340 kPa) for 60 minutes. This pressure is significantly higher than the maximum operating pressure to ensure that the system can handle the required operational stress and potential overpressures. Testing at this specified pressure allows for any potential leaks or weaknesses in the pipe and connections to be identified before the system goes into service. The duration of 60 minutes is sufficient to allow any pressure drops to be observed, ensuring that if there are any minor leaks or failures, they can be detected and addressed prior to put the system into operation. This approach prioritizes safety by ensuring a high reliability standard before the gas starts flowing, thereby preventing possible hazards due to leaks or pipe failures during normal operation.