Steam Gauges

Steam Gauges 1. Each steam boiler shall have a steam gauge, with dial range not less than 1 1/2 times the maximum allowable working pressure, connected to the steam space or to the steam connection to the water column. The steam gauge shall be connected to a siphon or equivalent device of sufficient capacity to keep the gauge tube filled with water and so arranged that the gauge cannot be shut off from the boiler except by a cock placed near the gauge and provided with a tee or lever handle arranged to be parallel to the pipe in which it is located when the cock is open. 2. When a steam gauge connection longer than eight feet becomes necessary, a shutoff valve may be used near the boiler provided the valve is of the outside- screw-and-yoke type and is locked open. The line shall be of ample size with provision for free blowing. 3. Each boiler shall be provided with a connection and suitable valving which connects to the steam space of each boiler for the exclusive purposes of attaching a test gauge when the boiler is in service so that the accuracy of the boiler steam gauge may be ascertained.