(1) Cylinders.
(a) Employers must ensure that the
manufacturing, in-plant transfer, transportation, handling, storage, and use of
acetylene in cylinders comply with this rule and the provisions of Compressed
Gas Association (CGA) Pamphlet G-1-2009 ("Acetylene") (Compressed Gas
Association, Inc., 12th ed., 2009).
(b) Definitions.
(A) Confined space: A space that meets all of
the following:
(i) Large enough and
configured so that an employee can fully enter the space and perform work.
(ii) Has limited or restricted
means for entry and/or exit.
(iii)
Is not designed for continuous human occupancy.
(B) Enclosed space - Spaces that are
surrounded by something, and the only openings are access openings, for
example, drawers, closets, unventilated cabinets, automobile trunks,
unventilated cylinder compartments, or toolboxes.
(C) Handling - Moving, connecting, or
disconnecting a compressed gas container under normal conditions.
(D) PSIG (Gauge Pressure) - Pressure above or
below local atmospheric pressure displayed as pounds per square inch.
(E) Secure - Arrange to prevent
movement (including lashing and chaining), or a minimum of three points of
contact with other cylinders or walls.
(F) Use - Withdrawing and using the gas in a
non-recoverable manner for applications other than manufacturing or repackaging
of compressed gasses.
(c) Acetylene Cylinders General Requirements.
(A) You must:
(i) Store and use cylinders valve end up.
NOTE: Gas suppliers and distributors may store
secured containers in a horizontal position.
(ii) Secure cylinder(s) to prevent falling or
movement.
(iii) Use a cylinder
cart or cylinder pallet to move acetylene cylinders.
NOTE: This rule does not apply to acetylene fill
plants, handling, distribution, and maintenance processes where cylinders are
tilted and rolled on their bottom edge only the minimal distance necessary to
get them on and off carts or pallets.
(iv) Attach the cylinder to a pressure
reducing regulator or blow back manifold before opening the cylinder valve.
(v) Remove pressure regulators
before moving cylinders unless they are secured in an upright position on a
cylinder cart.
(vi) Back out
regulator adjusting screws before opening cylinder valves.
(vii) Protect cylinders from contact with
welding spatters and cutting or burning slag.
(viii) Install reverse flow check valves and
flashback arresters according to manufacturer recommendation.
(B) You must not:
(i) Drop cylinders.
(ii) Drag cylinders.
(iii) Apply a torch to the side of a
cylinder.
(iv) Hoist cylinders
using lifting magnets, slings, ropes, chains, or any other device where the
cylinders form a part of the carrier.
(v) Handle cylinders so that the bottom
fusible metal pressure relief device can strike an object.
(vi) Expose any part of your body to the line
of discharge of a fusible metal pressure relief device.
(vii) Use acetylene at a pressure exceeding
15 psig.
(viii) Exceed an
acetylene withdrawal rate of one-seventh of the cylinder capacity per hour for
welding, cutting, and allied processes.
(d) Transporting Acetylene Cylinders
(additional requirements).
(A) You must
protect cylinders and attached regulators:
(i) From damage when being transported by any
vehicle.
(ii) From abnormal
mechanical shock that is likely to damage the cylinder, valve, or fusible metal
pressure relief device.
(B) You must not transport cylinders in
enclosed spaces.
(C) You must
ensure that cylinders are leak checked prior to each placement into the
vehicle. Cylinders left in vehicles overnight must be leak checked at the end
of the day and again prior to transporting.
(e) Acetylene Cylinder Storage.
(A) You must store cylinders:
(i) In assigned locations.
(ii) In areas posted with signs prohibiting
smoking and open flame.
(iii) In
well-ventilated locations.
(iv)
Away from heat sources.
(v) Where
they are protected from corrosion.
NOTE: Cylinders with or without regulators, kept
in or on vehicles due to their frequency of use will not be considered as
stored when a leak test is performed at the end of the day. When cylinders are
used during multiple shifts, they must be leak tested at the end of each
shift.
(B) You
must not store cylinders:
(i) Where they
contact electrical welding equipment or electrical circuits.
NOTE: All high and low pressure cylinders in
contact with or secured to a conductive table or column without being isolated
from electrical current can become part of an electrical circuit.
(ii) Where they can be struck by
heavy objects.
(iii) In enclosed
spaces.
(iv) In confined spaces.
(v) Within 20 feet of oxygen
unless they are separated by a noncombustible partition. Partitions must:
(I) vertically extend at least 18 inches
above the tallest container and not less than 5 feet.
(II) laterally extend at least 18 inches
beyond the sides of the containers.
(III) have a fire resistance rating of at
least one-half hour.
NOTE 1: (paragraph (1)(e)(b)(v)): single cylinders
of acetylene And oxygen can be stored secured on a cart or used adjacent to
each other Without a partition.
NOTE 2: (paragraph (1)(e)(b)(v)): single cylinders
of acetylene And oxygen secured at a work station without attached pressure
reducing Regulators are considered to be in use.
(vi) With full and empty cylinders grouped
together.
NOTE: (paragraph (1)(e)(b)(vi)): this does not
apply to the Cylinder distribution process.
(f) connecting And disconnecting
acetylene cylinders for use.
(A) you must:
(i) return cylinders with contaminated valves
(mud, oil, grease, and similar material) to the supplier.
(ii) Secure the cylinder(s) where it can not
contact any electrical circuit or electrical welding equipment.
NOTE: All high and low pressure cylinders in
contact with or secured to a conductive table column without being isolated
from electrical current can become part of an electrical circuit.
(iii) Inspect hoses before each
shift.
(iv) Remove damaged hoses
from service.
(v) Check
pressurized cylinder valves, fuse plugs and all connections for leaks prior to
use.
(vi) Use industry approved
leak detection solution or oil free soapy water.
(vii) Notify the gas supplier of any leaking
cylinder and follow the supplier's instruction for returning the cylinder.
(viii) Back out the regulator
adjusting screws before opening cylinder valves.
(ix) Close the system valves and release all
gas from the regulators before removing the regulator from a cylinder.
(x) Keep the cylinder key used for
opening the cylinder valve on the valve spindle when the cylinder is in use.
(B) You must not
attempt to repair or alter cylinders or valves.
(2) Piped Systems.
(a) Employers must comply with Chapter 9
("Acetylene Piping") of NFPA 51A-2006 ("Standard for Acetylene Charging
Plants") (National Fire Protection Association, 2006 ed., 2006).
(b) When employers can demonstrate that the
facilities, equipment, structures, or installations used to generate acetylene
or to charge (fill) acetylene cylinders were installed prior to February 16,
2006, these employers may comply with the provisions of Chapter 7 ("Acetylene
Piping") of NFPA 51A-2001 ("Standard for Acetylene Charging Plants") (National
Fire Protection Association, 2001ed., 2001).
(c) The provisions of
437-002-2102(2)(b)
also apply when the facilities, equipment,
structures, or installation used to generate acetylene or to charge (fill)
acetylene cylinders were approved for construction or installation prior to
February 16, 2006, but constructed and installed on or after that date.
(d) For additional information on
acetylene piping systems, see CGA G-1.2-2006, Part 3 ("Acetylene piping")
(Compressed Gas Association, Inc., 3rd ed., 2006).
(3) Generators and filling cylinders.
(a) Employer must ensure that facilities,
equipment, structures, or installations used to generate acetylene or to charge
(fill) acetylene cylinders comply with the provisions of NFPA 51A-2006
("Standard for Acetylene Charging plants") (National Fire Protection
Association, 2006 ed., 2006).
(b)
When employers can demonstrate that the facilities, equipment, structures, or
installations used to generate acetylene or to charge (fill) of acetylene
cylinders were constructed or installed prior to February 16, 2006, these
employers may comply with the provisions of NFPA 51A-2001 ("Standard for
Acetylene Charging Plants") (National Fire Protection Association, 2001 ed.,
2001).
(c) The provisions of
437-002-2102(3)(b)
also apply when the facilities, equipment,
structures, or installation were approved for construction or installation
prior to February 16, 2006, but constructed and installed on or after that
date.
Notes
Or. Admin. Code
§
437-002-2102
OSHA 1-2010, f. &
cert. ef. 2-19-10; OSHA 6-2014, f. 10-28-14, cert. ef.
5-1-15
Stat. Auth.: ORS
654.025(2)
& 656.726(4)
Stats. Implemented: ORS
654.001 -
654.295
