If an ASME tank cannot be fitted with an internal valve that provides emergency shutdown protection automatically in the event of a fire and remote shutdown capability, a(n) ______ may be used in combination with an excess-flow valve installed in the tank opening and a manual valve installed as close as possible to the excess-flow valve

If an ASME tank cannot be fitted with an internal valve that provides emergency shutdown protection automatically in the event of a fire and remote shutdown capability, a(n) ______ may be used in combination with an excess-flow valve installed in the tank opening and a manual valve installed as close as possible to the excess-flow valve

• A. Inline ESV
• B. Inline Valve
• C. Remote ESV
• D. External ESV

Answer: (D)

When a propane tank can’t have an internal valve that provides automatic emergency shutdown in a fire or remote shutoff capability, using an external emergency shutoff valve is the right approach. Placing this valve outside the tank gives a readily accessible means to shut off flow from the exterior, even when the tank’s own valve can’t provide automatic or remote actuation. This external valve works in concert with an excess-flow valve installed in the tank opening and a manual valve placed as close as possible to that excess-flow valve, creating multiple layers of protection: the excess-flow valve limits flow if the tank is damaged, the manual valve gives local control, and the external emergency shutoff can be actuated automatically or remotely in a fire. Inline or remote configurations don’t fit the specific arrangement described, making the external emergency shutoff valve the best fit.

When a propane tank can’t have an internal valve that provides automatic emergency shutdown in a fire or remote shutoff capability, using an external emergency shutoff valve is the right approach. Placing this valve outside the tank gives a readily accessible means to shut off flow from the exterior, even when the tank’s own valve can’t provide automatic or remote actuation. This external valve works in concert with an excess-flow valve installed in the tank opening and a manual valve placed as close as possible to that excess-flow valve, creating multiple layers of protection: the excess-flow valve limits flow if the tank is damaged, the manual valve gives local control, and the external emergency shutoff can be actuated automatically or remotely in a fire. Inline or remote configurations don’t fit the specific arrangement described, making the external emergency shutoff valve the best fit.