Any increase in the outlet pressure of a regulator; a term applied to gas regulators which may “creep” (because of slow pressure increases) when the seat does not close against the inlet nozzle, allowing gas to
enter the regulator beyond the pressure desired. A creeping regulator is detected by movement of the indicator in a low-pressure gauge.
In gas welding, with the valves on the torch closed, regulator creep occurs when the hand on the dial does not remain stationary, but indicates a higher pressure than it did while operating the torch. A creep of a few pounds is allowable, but when the creep reaches 50 pounds beyond the operating pressure, using the creeping iegulator is dangerous, since the pressure in the body of the regulator may burst the diaphragm or the gauge.