Louisiana Administrative Code
Title 55 - PUBLIC SAFETY
Part V - Fire Protection
Chapter 50 - Boiler Construction, Maintenance, Inspection and General Use
Subchapter C - Existing Installations- Power Boilers
Section V-5046 - Stop Valves

A. When a stop valve is used in the supply pipe connection of a single steam boiler, there shall be one used in the return pipe connection.

B. Stop valves in single hot water heating boilers shall be located at an accessible point in the supply and return pipe connections, as near the boiler nozzle as is convenient and practicable, to permit draining the boiler without emptying the system.

C. When the boiler is located above the system and can be drained without draining the system, stop valves may be eliminated.

D. A stop valve shall be used in each supply and return pipe connection of two or more boilers connected to a common system.

E. All valves or cocks shall conform to the applicable portions of HF-203 of Section IV of the ASME Code and may be ferrous or nonferrous.

F. The minimum pressure rating of all valves or cocks shall be at least equal to the pressure stamped upon the boiler, and the temperature rating of such valves or cocks, including all internal components, shall be not less than 250° F.

G. Valves or cocks shall be flanged, threaded or have ends suitable for welding or brazing.

H. All valves or cocks with stems or spindles shall have adjustable pressure type packing glands and, in addition, all plug type cocks shall be equipped with a guard or gland. The plug or other operating mechanism shall be distinctly marked in line with the passage to indicate whether it is opened or closed.

I. All valves or cocks shall have tight closure when under boiler pressure test.

J. When stop valves are used, they shall be properly designated substantially by tags of metal or other durable material fastened to them.