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 26 - Driving and Pressurized Worksite Operations › Article 154 - Pressurized Worksite Operations › Section 6115 - Fire Prevention

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Tunnels shall be provided with a 2-inch
						minimum diameter water line extending into the working chamber and to within
						100 feet of the working face. Such line shall have hose outlets with 100 feet
						of fire hose properly attached and maintained as follows: one at the working
						face; one immediately inside the bulkhead of the working chamber; and one
						immediately outside such bulkhead. In addition, hose outlets shall be provided
						at 200-foot intervals throughout the length of the tunnel and 100 feet of fire
						hose shall be attached to the outlet nearest to any location where flammable
						material is being kept or stored or where any flame is being used.
(b) Fire hose shall be at least 1 ½
						inches in nominal diameter. Water pressure shall at all times be adequate for
						efficient operation of the type of nozzle used and the water supply shall be
						such as to ensure an uninterrupted flow. Fire hose, when not in use, shall be
						located or guarded to prevent injury thereto.
(c) In addition to fire hose protection
						required by this section, on every floor of every building not under compressed
						air, but used in connection with the compressed air work, there shall be
						provided at least one approved extinguisher of the proper type for the hazard
						involved. At least two approved fire extinguishers shall be provided in the
						working chamber as follows: one at the working face and one immediately inside
						the bulkhead (pressure side). Extinguishers in the working chamber shall use
						water as the primary extinguishing agent and shall not use any extinguishing
						agent which could be harmful to the employees in the working chamber. The fire
						extinguisher shall be protected from damage.
(d) No persons shall be permitted to smoke or
						carry smoking materials in compressed air.
(e) While welding or flame cutting is being
						done in compressed air, a watch person with a fire hose or approved
						extinguisher shall stand by until such operation is completed.
(f) Highly combustible materials shall not be
						used or stored in the working chamber. Wood, paper, and similar combustible
						material shall not be used in the working chamber in quantities which could
						cause a fire hazard. The compressor building shall be constructed of
						noncombustible materials.
(g) Air
						locks shall be equipped with a manual-type fire extinguisher system that can be
						activated inside the air lock and also by the outside lock attendant. In
						addition, a fire hose and portable fire extinguisher shall be provided inside
						and outside the air lock. The portable fire extinguisher shall be the dry
						chemical type.
(h) Equipment,
						fixtures, and furniture in air locks and special decompression chambers shall
						be constructed of noncombustible materials. Bedding and other furnishings shall
						be chemically treated so as to be fire-resistant.
(i) Oxygen Safety.
(1) Equipment used with oxygen or mixtures
						containing over forty percent (40%) by volume oxygen shall be designed and
						maintained for oxygen service.
(2)
						Components exposed to oxygen or mixtures containing over forty percent (40%) by
						volume oxygen shall be free of oil, grease, and combustible
						materials.
(3) Oxygen systems over
						125 psig shall have slow-opening shut-off valves.
(4) Oxygen cylinders, piping, valves, gauges,
						regulators and other accessories shall be protected against physical
						damage.