User note:
About this chapter: Chapter 64 regulates the hazards associated with pyrophoric materials, which are capable of spontaneously igniting in the air at or below a temperature of 130°F (54°C). Many pyrophoric materials also pose severe flammability or reactivity hazards. This chapter addresses only the hazards associated with pyrophoric materials. Materials that pose multiple hazards must conform to the requirements of this code with respect to all hazards.
Permits shall be required as set forth in Section 105.6.
The following term is defined in Chapter 2:
Indoor storage of pyrophoric materials in amounts exceeding the maximum allowable quantity per control area indicated in Table 5003.1.1(1), shall be in accordance with Sections 5001, 5003 and 5004 and this chapter.
The storage of silane gas, and gas mixtures with a silane concentration of 1.37 percent or more by volume, shall be in accordance with ANSI/CGA G-13.
Storage of pyrophoric solids and liquids shall be limited to a maximum area of 100 square feet (9.3 m2) per pile. Storage shall not exceed 5 feet (1524 mm) in height. Individual containers shall not be stacked.
Aisles between storage piles shall be not less than 10 feet (3048 mm) in width.
Individual tanks or containers shall not exceed 500 gallons (1893 L) in capacity.
In addition to the requirements of Section 5003.9.8, indoor storage of pyrophoric materials shall be isolated from incompatible hazardous materials by 1-hour fire barriers with openings protected in accordance with the International Building Code.
Exception: Storage in approved hazardous materials storage cabinets constructed in accordance with Section 5003.8.7.
Outdoor storage of pyrophoric materials in amounts exceeding the maximum allowable quantity per control area indicated in Table 5003.1.1(3) shall be in accordance with Sections 5001, 5003 and 5004, and this chapter.
The storage of silane gas, and gas mixtures with a silane concentration of 1.37 percent or more by volume, shall be in accordance with ANSI/CGA G-13.
The separation of pyrophoric solids, liquids and gases from buildings, lot lines, public streets, public alleys, public ways or means of egress shall be in accordance with the following:
- Solids and liquids. Two times the separation required by Chapter 57 for Class IB flammable liquids.
- Gases. The location and maximum amount of pyrophoric gas per storage area shall be in accordance with Table 6404.2.1.
PYROPHORIC GASES—DISTANCE FROM STORAGE TO EXPOSURESa
| MAXIMUM AMOUNT PER STORAGE AREA (cubic feet) | MINIMUM DISTANCE BETWEEN STORAGE AREAS (feet) | MINIMUM DISTANCE TO LOT LINES OF PROPERTY THAT CAN BE BUILT UPON (feet) | MINIMUM DISTANCE TO PUBLIC STREETS, PUBLIC ALLEYS OR PUBLIC WAYS (feet) | MINIMUM DISTANCE TO BUILDINGS ON THE SAME PROPERTY | ||
| Nonrated construction or openings within 25 feet | Two-hour construction and no openings within 25 feet | Four-hour construction and no openings within 25 feet | ||||
| 250 | 5 | 25 | 5 | 5 | 0 | 0 |
| 2,500 | 10 | 50 | 10 | 10 | 5 | 0 |
| 7,500 | 20 | 100 | 20 | 20 | 10 | 0 |
For SI: 1 foot = 304.8 mm, 1 cubic foot = 0.02832 m3.
- The minimum required distances shall be reduced to 5 feet where protective structures having a minimum fire resistance of 2 hours interrupt the line of sight between the container and the exposure. The protective structure shall be not less than 5 feet from the exposure. The configuration of the protective structure shall allow natural ventilation to prevent the accumulation of hazardous gas concentrations.
