R 408.41980 Air receivers.

Rule 1980. (1) All new air receivers installed after July 28, 1995, shall be constructed in accordance with the American Society Of Mechanical Engineers (ASME) “Boiler And Pressure Vessel Code,” Section VIII, “Unfired Pressure Vessels,” 1980 edition which is adopted by reference in R 408.41902. (2) All safety valves used shall be constructed, installed, and maintained in accordance with the ASME “Boiler and Pressure Vessel Code,’ Section VIII, “Unfired Pressure Vessels,” 1980 edition, as adopted in R 408.41902. (3) Air receivers shall be installed so that all drains, handholes, and manholes are easily accessible. An air receiver shall not be buried underground or located in an inaccessible place. (4) A drain pipe and valve shall be installed at the lowest point of every air receiver to provide for the removal of accumulated oil and water. Adequate automatic traps may be installed in addition to drain valves. The drain valve on the air receiver shall be opened and the receiver completely drained frequently to prevent the accumulation of excessive amounts of liquid in the receiver. (5) Every air receiver shall be equipped with an indicating pressure gauge that is located so that it is readily visible and equipped with 1 or more spring-loaded safety valves. The total relieving capacity of the safety valves shall be adequate to prevent pressure in the receiver from exceeding the maximum allowable working pressure of the receiver by more than 10%. (6) A valve shall not be placed between the air receiver and its safety valve or valves. (7) Safety appliances, such as safety valves, indicating devices, and controlling devices, shall be constructed, located, and installed so that they cannot be readily rendered inoperative by any means, including the elements. (8) All safety valves shall be tested frequently at regular intervals to determine whether they are in good operating condition.