California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 20 - Flammable Liquids, Gases and Vapors
Article 138 - Hydrogen
Section 5493 - Handling of Liquefied Hydrogen Inside Buildings Other than Separate Buildings and Special Rooms
Universal Citation: 8 CA Code of Regs 5493
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) Portable liquefied hydrogen containers of 50 gallons or less capacity as permitted in Table H-3 and in compliance with Section 5491(f) when housed inside buildings not located in a special room and exposed to other occupancies shall comply with the following minimum requirements:
(1) Be located 20 feet from flammable liquids
and readily combustible materials such as excelsior or paper.
(2) Be located 25 feet from ordinary
electrical equipment, and other sources of ignition including process or
analytical equipment. (See Section
5489.)
(3) Be located 25 feet from concentrations of
people.
(4) Be located 50 feet from
intakes of ventilation and air-conditioning equipment or intakes of
compressors.
(5) Be located 50 feet
from storage of other flammable gases or storage of oxidizing gases.
(6) Containers shall be protected against
damage or injury due to falling objects or work activity in the area.
(7) Containers shall be firmly secured and
stored in an upright position.
(8)
Welding or cutting operations, and smoking shall be prohibited while hydrogen
is in the room.
(9) The area shall
be adequately ventilated. Safety relief devices on the containers shall be
vented directly outdoors or to a suitable hood. See Sections
5469(b) and
5491(f).
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