Current through Register Vol. 47, No. 12, March 26, 2025
(a) Compressed gas cylinders.
(1) Cylinder storage. Compressed gas
cylinders not in use shall be stored in an upright position remote from open
flames, radiators and other sources of heat, buildings or other structures and
from any combustible material and shall be protected from the sun and high
temperatures or fire-resistant shields shall be provided. Such cylinders shall
be so arranged or placed that they will not be knocked over or damaged by
passing or falling objects, equipment or materials. Cylinders containing oxygen
shall not be stored near cylinders containing combustible gas, combustible
material, oil or grease or in other areas where a spontaneous combustion hazard
exists. Cylinder valves shall be closed at all times when not in use.
(2) Control valves and regulators.
(i) The control valve of any compressed gas
cylinder shall be located at the domed end of such cylinder and when not in use
such control valve shall be protected by a suitable cap or ring guard. A key or
wrench shall be maintained on the spindle of every compressed gas cylinder at
all times during use.
(ii) Each
compressed gas cylinder in use shall be provided with a pressure regulator or
an automatic pressure reducing device.
(3) Use.
(i) Compressed gas cylinders shall be raised
or lowered only in suitable cradles. The use of ordinary slings for such
purpose is prohibited.
(ii)
Compressed gas cylinders shall not be dropped or thrown from any
height.
(iii) Compressed gas
cylinders shall be placed in an upright position when in use.
(iv) During use each compressed gas cylinder
shall be securely fastened to a stationary object unless other suitable
provision has been made to keep it from falling over.
(v) During use a compressed gas cylinder
shall be located at least six feet from any combustible material or from any
heating device.
(vi) Empty
compressed gas cylinders shall be immediately removed from working areas and
stored in designated safe locations. The valves of such cylinders shall be
closed and tags or signs indicating that such cylinders are empty shall be
attached thereto. The use of compressed gas cylinders as rollers, props or
supports is prohibited.
(b) Hose and hose connections.
(1) All hose shall be first quality and of a
type manufactured for use on construction or demolition job sites. Hose used
for oxygen cylinder connections shall have fittings of a different design that
hose used for compressed gas connections. Hose connections shall be of either
the ferrule or clamp type. Hose shall be capable of withstanding, without
leakage, a pressure equal to at least twice the maximum delivery pressure of
the pressure regulators provided for the system but not less than 300 pounds
per square inch gage.
(2) Hose
shall be protected from damage by trucks or other moving construction or
demolition equipment. Hose shall be so placed when in use as not to constitute
a falling or tripping hazard. All hose shall be carefully examined at frequent
intervals for leaks or for signs of excessive wear, damage from abrasion or any
other deterioration. Defective hose or hose connections shall be immediately
repaired or removed from the job site.
(c) Torches.
(1) Torches shall be lighted only by means of
friction lighters or self-contained electric spark igniters.
(2) When torches are changed or when welding
is halted for more than five minutes, all cylinder valves shall be
closed.
(3) Momentary stoppages may
be controlled at the torch valves.
(d) Protection of persons. All persons
engaged in welding or flame-cutting operations shall be provided where
necessary with proper scaffolds installed and used in compliance with this Part
(rule). Such persons shall be provided with approved eye protection suitable
for the work involved and appropriate protective apparel. When arc welding is
performed near other persons, such other persons shall be protected from the
arc rays by opaque screens or by approved eye protection.
(e) Fire protection.
(1) Oily and greasy substances shall be kept
away from the areas where cylinders, hose and torches are being used. Cylinder
valves and connections shall not be lubricated.
(2) Where there is a hazard to other persons
from flying particles of metal there shall be provided suitable incombustible
screening installed between the welding or flame-cutting operations and such
other persons.
(3) Whenever welding
or flame-cutting operations are performed in the vicinity of any combustible
material there shall be provided, within easy reach of the persons performing
such work, at least one approved fire extinguisher or fire pail filled with an
appropriate fire extinguishing agent.
(f) Explosion hazard. Before any welding or
flame cutting is done on any tank or container that contained any materials
which may generate a flammable vapor upon the application of heat, all piping
connected to such tank or container shall be disconnected or blanked off. Any
residual flammable material shall be removed and the tank or container shall be
completely purged with a suitable purging agent.