Virginia Law

A. Change Sections 5801.1 and 5801.2 to read:

5801.1 Scope. The storage and use of flammable gases and flammable cryogenic fluids shall be in accordance with this chapter and NFPA 55. Compressed gases shall also comply with Chapter 53 and cryogenic fluids shall also comply with Chapter 55. Flammable cryogenic fluids shall comply with Section 5806. Hydrogen motor fuel-dispensing stations and repair garages and their associated aboveground hydrogen storage systems shall also be designed, constructed and maintained in accordance with Chapter 23 and NFPA 2.

Exceptions:

1. Gases used as refrigerants in refrigeration systems (see Section 608).

2. Liquefied petroleum gases and natural gases regulated by Chapter 61.

3. Fuel-gas systems and appliances regulated under the International Fuel Gas Code other than gaseous hydrogen systems and appliances.

4. Pyrophoric gases in accordance with Chapter 64.

5801.2 Permits. Permits shall be required as set forth in Section 107.2.

B. Change Sections 5803.1, 5803.1.1.2, 5803.1.5, and 5804.1 to read:

5803.1 Quantities not exceeding the maximum allowable quantity per control area. The storage and use of flammable gases in amounts not exceeding the maximum allowable quantity per control area in accordance with the applicable building code shall be maintained in accordance with Sections 5001, 5003, 5801, and 5803.

5803.1.1.2 Aggregate quantity. The aggregate quantities of flammable gases used for maintenance purposes and operation of equipment shall be maintained as to not exceed the maximum allowable quantity per control area indicated in the applicable building code.

5803.1.5 Electrical. Electrical wiring and equipment shall be maintained in accordance with Chapter 6 and NFPA 70.

5804.1 Indoor storage. Indoor storage of flammable gases in amounts exceeding the maximum allowable quantity per control area in accordance with the applicable building code, shall be maintained in accordance with Sections 5001, 5003, and 5004; this chapter; and the applicable building code.

C. Change Sections 5804.1.1, 5805.1, and 5806.2 to read:

5804.1.1 Explosion control. Buildings or portions thereof containing flammable gases and provided with explosion control shall be maintained in accordance with Chapter 9 and remain in accordance with the applicable building code.

5805.1 General. The use of flammable gases in amounts exceeding the maximum allowable quantity per control area indicated in Section 5003.1.1 or Table 5003.1.1(3) shall be in accordance with Sections 5001, 5003, and 5005 and this chapter.

5806.2 Limitations. Storage of flammable cryogenic fluids in stationary containers outside of buildings may be subject to local ordinances or other regulations.

D. Change Section 5806.3 to read:

5806.3 Aboveground tanks for liquid hydrogen. Aboveground tanks for the storage of liquid hydrogen shall be maintained in accordance with the applicable building code.

E. Delete Sections 5806.3.1 through 5806.3.2.1.

F. Change Section 5806.4 to read:

5806.4 Underground tanks for liquid hydrogen. Underground tanks for the storage of liquid hydrogen shall be maintained in accordance with the applicable building code.

G. Delete Sections 5806.4.1 through 5806.4.3.

H. Change Section 5806.4.4 to read:

5806.4.4 Anchorage and security. Anchorage provided for tanks and systems shall be maintained in accordance with the applicable building code.

I. Delete Sections 5806.4.5 through 5806.4.8.3.

J. Change Sections 5807.1.10 and 5808.1 to read:

5807.1.10 Electrical. Electrical components for metal hydride storage systems shall be maintained in accordance with Chapter 6 and NFPA 70.

5808.1 General. Where required by the applicable building code, hydrogen fuel gas rooms shall be maintained.

K. Delete Sections 5808.3.1 and 5808.3.2 and change Sections 5808.2 and 5808.3 to read:

5808.2 Location. Unless otherwise permitted by the applicable building code, hydrogen fuel gas operations shall not be located below grade.

5808.3 Pressure control. Unless otherwise approved by the applicable building code, hydrogen fuel gas rooms shall maintain a negative pressure in relation to surrounding rooms and spaces. Windows shall remain in accordance with the applicable building code and shall not be able to be opened.

L. Change Sections 5808.4 and 5808.5 to read:

5808.4 Exhaust ventilation. Ventilation required for hydrogen fuel gas rooms shall be maintained and operated in accordance with the applicable building code.

5808.5 Gas detection system. Gas detection systems required for hydrogen fuel gas rooms shall be maintained and operated in accordance with the applicable building code.

M. Change Sections 5808.5.1 and 5808.5.2 to read:

5808.5.1 Operation. Where provided, activation of the gas detection system shall occur as designed and approved under the applicable building code. At no time shall the level of flammable gas exceed 25% lower flammable limit (LFL) and the system shall be maintained to result in both of the following:

1. Initiation of distinct audible and visual alarm signals both inside and outside of the hydrogen fuel gas room.

2. Activation of the mechanical exhaust ventilation system.

5808.5.2 Failure of the gas detection system. Unless otherwise required by the applicable building code, failure of the gas detection system shall result in the activation of the mechanical exhaust ventilation system, cessation of the hydrogen generation, and the sounding of a trouble signal in an approved location.

N. Change Sections 5808.6 and 5808.7 to read:

5808.6 Explosion control. Explosion control required for hydrogen fuel gas rooms shall be maintained in accordance with the applicable building code and Chapter 9.

5808.7 Standby power. Standby power provided for mechanical ventilation and gas detection systems shall be maintained in accordance with Chapter 12 and remain in accordance with the applicable building code.