If a relief device is removed for repair, which area should receive internal inspection?

If a relief device is removed for repair, which area should receive internal inspection?

• A. The valve body
• B. The inside of the inlet and outlet piping where the valve was removed
• C. The exterior of the piping
• D. The relief device bonnet

Answer: (B)

When a relief device is removed for repair, the main concern is the cleanliness and integrity of the flow path that will carry the relief discharge. The area most critical to inspect is the inside of the inlet and outlet piping where the device was removed. Debris, scale, corrosion, or buildup can accumulate there and obstruct the relief path or damage the valve seat when reinstalled, potentially preventing proper relief or causing leaks. Checking this interior ensures there’s no obstruction or damage in the actual discharge path. Exterior surfaces, the bonnet, or the valve body are less likely to affect the immediate flow the relief device must handle, so the primary internal inspection focus is the inside of the piping at the points where the device connected.

When a relief device is removed for repair, the main concern is the cleanliness and integrity of the flow path that will carry the relief discharge. The area most critical to inspect is the inside of the inlet and outlet piping where the device was removed. Debris, scale, corrosion, or buildup can accumulate there and obstruct the relief path or damage the valve seat when reinstalled, potentially preventing proper relief or causing leaks. Checking this interior ensures there’s no obstruction or damage in the actual discharge path. Exterior surfaces, the bonnet, or the valve body are less likely to affect the immediate flow the relief device must handle, so the primary internal inspection focus is the inside of the piping at the points where the device connected.