The following word and term shall, for the purposes of this chapter and as used elsewhere in this code, have the meaning shown herein.
PYROPHORIC. A chemical with an autoignition temperature in air, at or below a temperature of 130°F (54°C).
Indoor storage of pyrophoric materials in amounts exceeding the maximum allowable quantity per control area indicated in Table 2703.1.1(1), shall be in accordance with Sections 2701, 2703 and 2704 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 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 a minimum of 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 2703.9.8, 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 2703.8.7.
Outdoor storage of pyrophoric materials in amounts exceeding the maximum allowable quantity per control area indicated in Table 2703.1.1(3) shall be in accordance with Sections 2701, 2703 and 2704 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 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:
1. Solids and liquids. Two times the separation required by Chapter 34 for Class IB flammable liquids.
2. Gases. The location and maximum amount of pyrophoric gas per storage area shall be in accordance with Table 4104.2.1.
TABLE 4104.2.1
PYROPHORIC GASES—DISTANCE FROM STORAGE TO EXPOSURESa
| MAXIMUM AMOUNT PER STORAGE AREA | MINIMUM DISTANCE BETWEEN STORAGE AREAS | MINIMUM DISTANCE TO LOT LINES OF PROPERTY THAT CAN BE BUILT UPON | MINIMUM | MINIMUM DISTANCE TO BUILDINGS ON THE SAME PROPERTY | ||
| Nonrated construction or openings within | Two-hour construction and no openings within | Four-hour construction and no openings within | ||||
| 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.
a. The minimum required distances shall be reduced to 5 feet when 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 at least 5 feet from the exposure. The configuration of the protective structure shall allow natural ventilation to prevent the accumulation of hazardous gas concentrations.
When overhead construction is provided for sheltering of outdoor use areas of pyrophoric materials, the use areas shall be provided with approved automatic fire-extinguishing system protection.
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