New York Low Pressure Boiler COF Practice

What type of drain must the discharge pipe on a safety valve be fitted with?

1. Closed drain

2. Sealed drain

3. Open drain

4. Variable drain

The correct answer is: Open drain

The discharge pipe on a safety valve must be fitted with an open drain to ensure that any discharge from the safety valve can be safely directed away from the boiler and any critical areas. An open drain allows for the free flow of any steam or water vapor released by the valve during operation, preventing pressure buildup and potential hazards. In addition, having an open drain helps maintain visibility for operators to confirm that the safety valve is functioning properly if it discharges. This visibility is crucial for ensuring safe boiler operation. In contrast, a closed or sealed drain could trap steam or water, leading to dangerous pressure accumulation and possible failure of the safety system. Therefore, it's essential to have an open drain as part of the safety measures surrounding boiler operation and maintenance.