5003.2.2.1 Design and construction.
FC § 5003.2.2.1
Piping, tubing, valves, fittings and ancillary equipment used for hazardous materials shall be in accordance with the following: 1. Piping, tubing, valves, fittings and ancillary equipment shall be designed and fabricated from materials compatible with the material to be contained and shall be of adequate strength and durability to withstand the pressure, structural and seismic stress, and exposure to which they are subjected.
2.Piping and tubing shall be identified in accordance with ASME A13.1 to indicate the material conveyed.
3.Readily accessible manual valves, or automatic remotely-activated fail-safe emergency shutoff valves, shall be installed on supply piping and tubing at the point of use and at the tank, container or other source of supply.
4.Emergency shutoff valves shall be clearly visible and readily accessible. A durable sign shall be conspicuously posted immediately adjacent to such valves that identifies their location.
5.Backflow prevention or check valves shall be provided when the backflow of hazardous materials could create a hazardous condition or cause the unauthorized discharge of hazardous materials.
6.Where gases or liquids having a hazard ranking of health hazard Class 3 or 4, flammability Class 4, or instability Class 3 or 4 in accordance with NFPA 704 are conveyed in pressurized piping above 15 pounds per square inch gauge (psig) (103 kPa), an approved means of leak detection and emergency shutoff or excess flow control shall be provided. Where the piping originates from within a hazardous material storage room or area, the excess flow control shall be located within the storage room or area. Where the piping originates from any other source of supply, the excess flow control shall be located as close to the source of supply as practical. Exceptions: 1. Piping for inlet connections designed to prevent backflow.
