reglab/statecodes huggingface dataset:
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48001 - Oxygen fuel gas systems

Current through Register Vol. 24-14, July 15, 2024
(1)
				  Explosive mixtures of fuel gases and air or oxygen must be guarded against. No
				  accessory that allows air or oxygen to mix with flammable gases prior to use
				  must be allowed unless approved for that purpose.
Exception:
Air or oxygen may mix with flammable gases at the
							 burner or in a standard torch.
(2) Acetylene must never be generated, piped
				  (except in approved cylinder manifolds) or used at a pressure in excess of 15
				  psi gauge pressure or 30 psi absolute pressure. (The 30 psi absolute pressure
				  limit is intended to prevent unsafe use of acetylene in pressurized chambers
				  such as caissons, underground excavations or tunnel construction.) Using liquid
				  acetylene is prohibited.
Exception:
This requirement does not apply to storage of
							 acetylene dissolved in a suitable solvent in cylinders manufactured and
							 maintained according to DOT requirements, or to acetylene for chemical
							 use.
(3) Only approved apparatus such as torches,
				  regulators or pressure-reducing valves, acetylene generators, and manifolds
				  must be used. Replacement tips may be used on approved torches, if the
				  replacement tips are made to the same specifications as the original, or when
				  replacements are used with convertor/adaptors that meet the same
				  specifications.
(4) Before leaving
				  any employee in charge of the oxygen or fuel-gas supply equipment, including
				  generators, and oxygen or fuel-gas distribution piping systems, the employer
				  must ensure that the employee has received proper instruction and is competent
				  to do the work. Rules and instructions covering the operation and maintenance
				  of oxygen or fuel-gas supply equipment including generators, and oxygen or
				  fuel-gas distribution piping systems must be readily available.
97-09-013, recodified as § 296-307-48001, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48001, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48003 - Portable cylinders

Current through Register Vol. 24-14, July 15, 2024
All portable cylinders used for storing and shipping
					 compressed gases must be constructed and maintained according to DOT
					 regulations.
(1) Compressed gas
				  cylinders must be legibly marked with either the chemical or the trade name of
				  the gas. The marking must be a permanent stencil, stamp, or label. Whenever
				  practical, the marking must be located on the shoulder of the
				  cylinder.
(2) Compressed gas
				  cylinders must have connections that meet the requirements of the American
				  National Standard Compressed Gas Cylinder Valve Outlet and Inlet Connections,
				  ANSI B 57.1-1965.
(3) All cylinders
				  with a water weight capacity greater than thirty pounds must have means of
				  connecting a valve protection cap or with a collar or recess to protect the
				  valve.
97-09-013, recodified as § 296-307-48003, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48003, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48005 - Storing compressed gas cylinders

Current through Register Vol. 24-14, July 15, 2024
(1) Cylinders must be kept away from
				  radiators and other sources of heat.
(2) Indoors, cylinders must be stored in a
				  well-protected, well-ventilated, dry area, at least twenty feet from highly
				  combustible materials such as oil or excelsior. Cylinders should be stored in
				  assigned places away from elevators, stairs, or gangways. Assigned storage
				  spaces must be located where cylinders will not be knocked over or damaged by
				  passing or falling objects, or subject to tampering. All cylinder enclosures
				  must be ventilated.
(3) Empty
				  cylinders must have their valves closed.
(4) Valve protection caps on cylinders
				  designed to accept a cap, must always be in place and hand-tight, except when
				  cylinders are in use or connected for use.
97-09-013, recodified as § 296-307-48005, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48005, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48007 - Storing fuel-gas cylinders

Current through Register Vol. 24-14, July 15, 2024
Cylinders stored indoors, except those in use or attached
					 ready for use, must be limited to a total gas capacity of 2,000 cubic feet or
					 300 pounds of LP-gas.
(1) Cylinders in
				  excess of 2,000 cubic feet total gas capacity or 300 pounds of LP-gas, must be
				  stored in a separate room or compartment that meets the requirements of 252
				  (a)(8) and (9) C.F.R., or cylinders must be kept outside or in a special
				  building. Special buildings, rooms or compartments must be free from open flame
				  for heating or lighting and must be well ventilated. They may also be used for
				  storage of a maximum of 600 pounds of calcium carbide, when contained in metal
				  containers complying with 252 (a)(7)(a) and (b) C.F.R. Signs should be
				  conspicuously posted in such rooms reading, "Danger-No smoking, matches or open
				  lights," or other equivalent wording.
(2) Acetylene cylinders must be stored valve
				  end up.
97-09-013, recodified as § 296-307-48007, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48007, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48009 - Storing oxygen cylinders

Current through Register Vol. 24-14, July 15, 2024
(1)
				  Oxygen cylinders must not be stored near highly combustible material,
				  especially oil and grease; or near reserve stocks of carbide and acetylene or
				  other fuel-gas cylinders, or near any other substance likely to cause or
				  accelerate fire; or in an acetylene generator compartment.
(2) Oxygen cylinders stored in outside
				  generator houses must be separated from the generator or carbide storage rooms
				  by a noncombustible partition having a fire-resistance rating of at least one
				  hour. This partition must be without openings and must be gastight.
(3) Oxygen cylinders in storage must be
				  separated from fuel-gas cylinders or combustible materials (especially oil or
				  grease), a minimum of 20 feet or by a noncombustible barrier at least five feet
				  high having a fire-resistance rating of at least one-half hour. (Cylinders
				  "in-use," secured to a hand truck or structural member, with regulators, hoses,
				  and torch temporarily removed for security purposes overnight or weekends, are
				  not considered "in-storage.")
(4)
				  Where a liquid oxygen system is to be used to supply gaseous oxygen for welding
				  or cutting and the system has a storage capacity of more than 13,000 cubic feet
				  of oxygen (measured at 14.7 psi(a) and 70°F), connected in service or ready
				  for service, or more than 25,000 cubic feet of oxygen (measured at 14.7 psi(a)
				  and 70°F), including unconnected reserves on hand at the site, it must meet
				  the requirements of the Standard for Bulk Oxygen Systems at Consumer Sites,
				  NFPA No. 566-1965.
97-09-013, recodified as § 296-307-48009, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48009, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48011 - Working with cylinders and contain-ers

Current through Register Vol. 24-14, July 15, 2024
(1) The numbers and markings stamped into
				  cylinders must not be tampered with.
(2) Cylinders, cylinder valves, couplings,
				  regulators, hose, and apparatus must be kept free from oily or greasy
				  substances. Oxygen cylinders or apparatus must not be handled with oily hands
				  or gloves. A jet of oxygen must never be permitted to strike an oily surface,
				  greasy clothes, or enter a fuel oil or other storage tank.
(3) Cylinders must be kept far enough away
				  from the actual welding or cutting operation so that sparks, hot slag, or flame
				  will not reach them, or fire-resistant shields must be provided.
(4) No person, other than the gas supplier,
				  may attempt to mix gases in a cylinder. No one, except the owner of the
				  cylinder or person authorized by the owner, may refill a cylinder.
(5) Cylinders must not be placed where they
				  might become part of an electric circuit. Contacts with third rails, trolley
				  wires, etc., must be avoided.
(6)
				  Fuel-gas cylinders must be placed with valve end up whenever they are in use.
				  Liquefied gases must be stored and shipped with the valve end up.
(7) A suitable cylinder truck, chain, or
				  other steadying device must be used to prevent cylinders from being knocked
				  over while in use.
97-09-013, recodified as § 296-307-48011, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48011, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48013 - Safety devices on cylinders

Current through Register Vol. 24-14, July 15, 2024
(1) Valve-protection caps must not be used
				  for lifting cylinders from one vertical position to another. Bars must not be
				  used under valves or valve-protection caps to pry cylinders loose when frozen
				  to the ground or otherwise fixed; we recommend using warm (not boiling) water.
				  Valve-protection caps are designed to protect cylinder valves from
				  damage.
(2) Cylinders without fixed
				  hand wheels must have keys, handles, or nonadjustable wrenches on valve stems
				  while these cylinders are in service. In multiple cylinder installations only
				  one key or handle is required for each manifold.
(3) No one may tamper with safety devices in
				  cylinders or valves.
(4) Nothing
				  may be placed on top of an acetylene cylinder when in use that may damage the
				  safety device or interfere with the quick closing of the valve.
(5) Where a special wrench is required it
				  must be left in position on the stem of the valve while the cylinder is in use
				  so that the fuel-gas flow can be quickly turned off in case of emergency. In
				  the case of manifolded or coupled cylinders at least one such wrench must
				  always be available for immediate use.
(6) Cylinders with leaking fuse plugs or
				  other leaking safety devices should be plainly marked with a warning not to
				  approach them with a lighted cigarette or other source of ignition. The
				  employer should notify the supplier promptly and follow the supplier's
				  instructions as to their return.
97-09-013, recodified as § 296-307-48013, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48013, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48015 - Transporting cylinders

Current through Register Vol. 24-14, July 15, 2024
(1)
				  When transporting cylinders by a crane or derrick, a cradle, boat, or suitable
				  platform must be used. Slings or electric magnets are prohibited for this
				  purpose. Valve-protection caps, where cylinder is designed to accept a cap,
				  must always be in place.
(2) Unless
				  cylinders are secured on a special truck, regulators must be removed and
				  valve-protection caps, when provided for, must be put in place before cylinders
				  are moved.
(3) When cylinders are
				  transported by powered vehicle they must be secured in a vertical
				  position.
97-09-013, recodified as § 296-307-48015, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48015, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48017 - Handling cylinders

Current through Register Vol. 24-14, July 15, 2024
(1)
				  Cylinders must not be dropped or struck or permitted to strike each other
				  violently.
(2) Cylinders must be
				  handled carefully. Cylinders must not be subjected to rough handling, knocks,
				  or falls that are liable to damage the cylinder, valve or safety devices and
				  cause leakage.
(3) Cylinders must
				  never be used as rollers or supports, whether full or empty.
97-09-013, recodified as § 296-307-48017, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48017, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48019 - Cylinder valves

Current through Register Vol. 24-14, July 15, 2024
(1) Cylinder
				  valves must be closed before moving cylinders.
(2) Cylinder valves must be closed when work
				  is finished.
(3) Valves of empty
				  cylinders must be closed.
(4) A
				  hammer or wrench must not be used to open cylinder valves. If valves cannot be
				  opened by hand, the supplier must be notified.
(5) Cylinder valves must not be tampered with
				  nor should any attempt be made to repair them. If the employer has trouble with
				  a cylinder, the employer should send a report to the supplier indicating the
				  character of the trouble and the cylinder's serial number. The employer must
				  follow the supplier's instructions on what to do with the cylinder.
(6) Complete removal of the stem from a
				  diaphragm-type cylinder valve must be avoided.
(7) If cylinders are found to have leaky
				  valves or fittings that cannot be stopped by closing of the valve, the
				  cylinders must be taken outdoors away from sources of ignition and slowly
				  emptied.
(8) The cylinder valve
				  must always be opened slowly.
(9)
				  An acetylene cylinder valve must not be opened more than one and one-half turns
				  of the spindle, and preferably no more than three-fourths of a turn.
97-09-013, recodified as § 296-307-48019, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48019, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48021 - Cylinder regulators

Current through Register Vol. 24-14, July 15, 2024
(1)
				  Unless connected to a manifold, oxygen from a cylinder must first have an
				  oxygen regulator attached to the cylinder valve.
(2) Before connecting a regulator to a
				  cylinder valve, the valve must be opened slightly and closed immediately. The
				  valve must be opened while standing to one side of the outlet; never in front
				  of it. Fuel-gas cylinder valves must not be cracked near other welding work or
				  near sparks, flame, or other possible sources of ignition.
(3) Before a regulator is removed from a
				  cylinder valve, the cylinder valve must be closed and the gas released from the
				  regulator.
(4) Fuel-gas must not be
				  used from cylinders through torches or other devices equipped with shut-off
				  valves without reducing the pressure through a suitable regulator attached to
				  the cylinder valve or manifold.
97-09-013, recodified as § 296-307-48021, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48021, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48023 - Fuel-gas manifolds

Current through Register Vol. 24-14, July 15, 2024
(1)
				  Manifolds must be approved either separately for each component part or as an
				  assembled unit.
(2) Fuel-gas
				  cylinders connected to one manifold inside a building must be limited to a
				  maximum total capacity of 300 pounds of LP-gas or 3,000 cubic feet of other
				  fuel-gas. More than one such manifold with connected cylinders may be located
				  in the same room if the manifolds are at least 50 feet apart or separated by a
				  noncombustible barrier at least 5 feet high having a fire-resistance rating of
				  at least one-half hour.
(3)
				  Exception: Fuel-gas cylinders connected to one manifold having an aggregate
				  capacity exceeding 300 pounds of LP-gas or 3,000 cubic feet of other fuel-gas
				  must be located outdoors, or in a separate building or room constructed
				  according to 252 (a)(8) and (9) C.F.R.
(4) Separate manifold buildings or rooms may
				  also be used for the storage of drums of calcium carbide and cylinders
				  containing fuel gases as provided in WAC
				  296-307-48007.
				  Such buildings or rooms must have no open flames for heating or lighting and
				  must be well ventilated.
(5)
				  High-pressure fuel-gas manifolds must have approved pressure regulating
				  devices.
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-48023,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-48023,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and[49.17.]060 .
						96-22-048, § 296-306A-48023, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48025 - High-pressure oxygen manifolds

Current through Register Vol. 24-14, July 15, 2024
This section applies to cylinders with a DOT service
					 pressure above 200 psig.
(1) Manifolds
				  must be approved either separately for each component or as an assembled
				  unit.
(2) Oxygen manifolds must not
				  be located in an acetylene generator room. Oxygen manifolds must be separated
				  from fuel-gas cylinders or combustible materials (especially oil or grease), a
				  minimum distance of 20 feet or by a noncombustible barrier at least 5 feet high
				  having a fire-resistance rating of at least one-half hour.
(3) Oxygen cylinders connected to one
				  manifold must be limited to a total gas capacity of 6,000 cubic feet. More than
				  one such manifold with connected cylinders may be located in the same room if
				  the manifolds are at least 50 feet apart or separated by a noncombustible
				  barrier at least 5 feet high having a fire-resistance rating of at least
				  one-half hour.
(4) Exception: An
				  oxygen manifold, to which cylinders having an aggregate capacity of more than
				  6,000 cubic feet of oxygen are connected, should be located outdoors or in a
				  separate noncombustible building. Such a manifold, if located inside a building
				  having other occupancy, must be located in a separate room of noncombustible
				  construction having a fire-resistance rating of at least one-half hour or in an
				  area with no combustible material within 20 feet of the manifold.
(5) An oxygen manifold or oxygen bulk supply
				  system that has storage capacity of more than 13,000 cubic feet of oxygen
				  (measured at 14.7 psia and 70°F), connected in service or ready for
				  service, or more than 25,000 cubic feet of oxygen (measured at 14.7 psia and
				  70°F), including unconnected reserves on hand at the site, must meet the
				  requirements of the Standard for Bulk Oxygen Systems at Consumer Sites, NFPA
				  No. 566-1965.
(6) High-pressure
				  oxygen manifolds must have approved pressure-regulating devices.
97-09-013, recodified as § 296-307-48025, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48025, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48027 - Low-pressure oxygen manifolds

Current through Register Vol. 24-14, July 15, 2024
This section applies to cylinders with a maximum DOT
					 service pressure of 200 psig.
(1)
				  Manifolds must be of substantial construction suitable for use with oxygen at a
				  pressure of 250 psig. They must have a minimum bursting pressure of 1,000 psig
				  and must be protected by a safety-relief device that will relieve at a maximum
				  pressure of 500 psig.
Note:
DOT-4L200 cylinders have safety devices that
								relieve at a maximum pressure of 250 psig (or 235 psig if vacuum insulation is
								used).
(2) Hose and hose connections subject to
				  cylinder pressure must meet the requirements of WAC
				  296-307-48049.
				  Hose must have a minimum bursting pressure of 1,000 psig.
(3) The assembled manifold including leads
				  must be tested and proven gas-tight at a pressure of 300 psig. The fluid used
				  for testing oxygen manifolds must be oil-free and not combustible.
(4) The location of manifolds must meet the
				  requirements of WAC
				  296-307-48025.
(5) The following sign must be conspicuously
				  posted at each manifold:
Low-Pressure Manifold
Do Not Connect High-Pressure Cylinders
Maximum Pressure-250 PSIG
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-48027,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-48027,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48027, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48029 - Manifolding portable outlet headers

Current through Register Vol. 24-14, July 15, 2024
(1) Portable outlet headers must not be used
				  indoors except for temporary service where the conditions preclude a direct
				  supply from outlets located on the service piping system.
(2) Each outlet on the service piping from
				  which oxygen or fuel-gas is withdrawn to supply a portable outlet header must
				  have a readily accessible shut-off valve.
(3) Hose and hose connections used for
				  connecting the portable outlet header to the service piping must meet the
				  requirements of WAC
				  296-307-48051.
(4) Master shut-off valves for
				  both oxygen and fuel-gas must be provided at the entry end of the portable
				  outlet header.
(5) Portable outlet
				  headers for fuel-gas service must have an approved hydraulic back-pressure
				  valve installed at the inlet and preceding the service outlets, unless an
				  approved pressure-reducing regulator, an approved backflow check valve, or an
				  approved hydraulic back-pressure valve is installed at each outlet. Outlets
				  provided on headers for oxygen service may be fitted for use with
				  pressure-reducing regulators or for direct hose connection.
(6) Each service outlet on portable outlet
				  headers must have a valve assembly that includes a detachable outlet seal cap,
				  chained or otherwise attached to the body of the valve.
(7) Materials and fabrication procedures for
				  portable outlet headers must comply with WAC
				  296-307-48033,
				  296-307-48035,
				  and
				  296-307-48041.
(8) Portable outlet headers must
				  have frames that will support the equipment securely in the correct operating
				  position and protect them from damage during handling and operation.
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-48029,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-48029,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48029, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48031 - Operating procedures for cylinder manifolds

Current through Register Vol. 24-14, July 15, 2024
(1) Cylinder manifolds must be installed
				  under the supervision of someone familiar with the proper practices of
				  construction and use.
(2) All
				  component parts used in the methods of manifolding described in WAC
				  296-307-48023
				  must have the materials, design and construction approved either separately or
				  as an assembled unit.
(3) All
				  manifolds and parts used in methods of manifolding must be used only for the
				  gas or gases for which they are approved.
(4) When acetylene cylinders are coupled,
				  approved flash arresters must be installed between each cylinder and the
				  coupler block. For outdoor use only, and when the number of cylinders coupled
				  does not exceed three, one flash arrester installed between the coupler block
				  and regulator is acceptable.
(5)
				  Each fuel-gas cylinder lead should have a backflow check valve.
(6) The maximum aggregate capacity of
				  fuel-gas cylinders connected to a portable manifold inside a building must be
				  3,000 cubic feet of gas.
(7)
				  Acetylene and liquefied fuel-gas cylinders must be manifolded
				  vertically.
(8) The pressure in the
				  gas cylinders connected to and discharged simultaneously through a common
				  manifold must be approximately equal.
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-48031,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-48031,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48031, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48033 - Design of service piping systems

Current through Register Vol. 24-14, July 15, 2024
(1) Piping and fittings must comply with
				  Section 2, Industrial Gas and Air Piping Systems, of the American National
				  Standard Code for Pressure Piping, ANSI B 31. 1-1967, if they do not conflict
				  with subsections (2) and (3) of this section.
(2) Pipe must be at least Schedule 40 and
				  fittings must be at least standard weight in sizes up to and including 6-inch
				  nominal.
(3) Copper tubing must be
				  Types K or L according to the Standard Specification for Seamless Copper Water
				  Tube, ASTM B88-66a.
(4) Piping must
				  be steel, wrought iron, brass or copper pipe, or seamless copper, brass or
				  stainless steel tubing, except as provided in subsections (5) through (9) of
				  this section.
(5) Oxygen piping and
				  fittings at pressures in excess of 700 psig, must be stainless steel or copper
				  alloys.
(6) Hose connections and
				  hose complying with WAC
				  296-307-48051
				  may be used to connect the outlet of a manifold pressure regulator to piping if
				  the working pressure of the piping is 250 psig or less and the length of the
				  hose is a maximum of 5 feet. Hose must have a minimum bursting pressure of
				  1,000 psig.
(7) When oxygen is
				  supplied to a service piping system from a low-pressure oxygen manifold without
				  an intervening pressure regulating device, the piping system must have a
				  minimum design pressure of 250 psig. A pressure regulating device must be used
				  at each station outlet when the connected equipment is for use at pressures
				  less than 250 psig.
(8) Piping for
				  acetylene or acetylenic compounds must be steel or wrought iron.
(9) Unalloyed copper must only be used for
				  acetylene or acetylenic compounds in listed equipment.
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-48033,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-48033,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48033, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48035 - Piping joints

Current through Register Vol. 24-14, July 15, 2024
(1) Joints in
				  steel or wrought iron piping must be welded, threaded or flanged. Fittings,
				  such as ells, tees, couplings, and unions, must be rolled, forged or cast
				  steel, malleable iron or nodular iron. Gray or white cast iron fittings are
				  prohibited.
(2) Joints in brass or
				  copper pipe must be welded, brazed, threaded, or flanged. Socket type joints
				  must be brazed with silver-brazing alloy or similar high melting point (not
				  less than 800°F) filler metal.
(3) Joints in seamless copper, brass, or
				  stainless steel tubing must be approved gas tubing fittings or the joints must
				  be brazed. Socket type joints must be brazed with silver-brazing alloy or
				  similar high melting point (not less than 800°F) filler metal.
97-09-013, recodified as § 296-307-48035, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48035, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48039 - Painting and marking service piping systems

Current through Register Vol. 24-14, July 15, 2024
(1) Underground pipe and tubing and outdoor
				  ferrous pipe and tubing must be covered or painted with a suitable material for
				  protection against corrosion.
(2)
				  Aboveground piping systems must be marked according to the American National
				  Standard Scheme for the Identification of Piping Systems, ANSI A
				  13.1-1956.
(3) Station outlets must
				  be marked to indicate the name of the gas.
97-09-013, recodified as § 296-307-48039, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48039, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48041 - Testing service piping systems

Current through Register Vol. 24-14, July 15, 2024
(1) Piping systems must be tested and proved
				  gastight at 1-1/2 times the maximum operating pressure, and must be thoroughly
				  purged of air before being placed in service. The material used for testing
				  oxygen lines must be oil free and noncombustible. Flames must not be used to
				  detect leaks.
(2) When flammable
				  gas lines or other parts of equipment are being purged of air or gas, sources
				  of ignition are prohibited near uncapped openings.
97-09-013, recodified as § 296-307-48041, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48041, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48043 - Equipment installation

Current through Register Vol. 24-14, July 15, 2024
Equipment shall be installed and used only in the service
					 for which it is approved and as recommended by the
					 manufacturer.
97-09-013, recodified as § 296-307-48043, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48043, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48045 - Protecting piping systems

Current through Register Vol. 24-14, July 15, 2024
Service piping systems must be protected by pressure relief
					 devices set to function at not more than the design pressure of the systems and
					 discharging upwards to a safe location.
97-09-013, recodified as § 296-307-48045, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48045, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48047 - Piping protective equipment

Current through Register Vol. 24-14, July 15, 2024
(1) The fuel-gas and oxygen piping systems,
				  including portable outlet headers must incorporate the protective equipment
				  shown in Figures V-1, V-2, and V-3.
When only a portion of a fuel-gas system is to be used with
					 oxygen, only that portion must meet this requirement.
(2) Approved protective equipment (designated
				  PF in Figs. V-1, V-2, and V-3) must be installed in fuel-gas piping to prevent:
(a) Backflow of oxygen into the fuel-gas
				  supply system;
(b) Passage of a
				  flash back into the fuel-gas supply system; and
(c) Excessive back pressure of oxygen in the
				  fuel-gas supply system. The three functions of the protective equipment may be
				  combined in one device or may be provided by separate devices.
Click to view
					 image
PF = Protective equipment in fuel-gas piping
VF = Fuel-gas station outlet valve
VO = Oxygen station outlet valve
SF = Backflow prevention device(s) at fuel-gas station
					 outlet
SO = Backflow prevention device(s) at oxygen station
					 outlet
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48049 - Station outlet protective equipment

Current through Register Vol. 24-14, July 15, 2024
(1) A check valve pressure regulator,
				  hydraulic seal, or combination of these devices must be provided at each
				  station outlet, including those on portable headers, to prevent backflow, as
				  shown in Figures 1, 2, and 3 and designated as SF and SO.
(2) When approved pipeline protective
				  equipment (designated PF) is located at the station outlet as in Figure 3, no
				  additional check valve, pressure regulator, or hydraulic seal is
				  required.
(3) Each station outlet
				  must have a shut-off valve (designated VF and VO) installed on the upstream
				  side of other station outlet equipment.
(4) If the station outlet is equipped with a
				  detachable regulator, the outlet must terminate in a union connection that
				  meets the requirements of the Regulator Connection Standards, 1958, Compressed
				  Gas Association.
(5) If the station
				  outlet is connected directly to a hose, the outlet must terminate in a union
				  connection that meets the requirements of the Standard Hose Connection
				  Specifications, 1957, Compressed Gas Association.
(6) Station outlets may terminate in pipe
				  threads to which permanent connections are to be made, such as to a
				  machine.
(7) Station outlets must
				  have a detachable outlet seal cap secured in place. This cap must be used to
				  seal the outlet except when a hose, a regulator, or piping is
				  attached.
(8) Where station outlets
				  are equipped with approved backflow and flashback protective devices, as many
				  as four torches may be supplied from one station outlet through rigid piping,
				  if each outlet from such piping, is equipped with a shut-off valve and if the
				  fuel-gas capacity of any one torch does not exceed 15 cubic feet per hour. This
				  rule does not apply to machines.
97-09-013, recodified as § 296-307-48049, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48049, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48051 - Hose and hose connections

Current through Register Vol. 24-14, July 15, 2024
(1)
				  Hose for oxy-fuel gas service must meet the requirements of the Specification
				  for Rubber Welding Hose, 1958, Compressed Gas Association and Rubber
				  Manufacturers Association.
(2) The
				  generally recognized colors are red for acetylene and other fuel-gas hose,
				  green for oxygen hose, and black for inert-gas and air hose.
(3) When parallel lengths of oxygen and
				  acetylene hose are taped together for convenience and to prevent tangling, a
				  maximum of 4 inches out of 12 inches must be covered by tape.
(4) Hose connections must meet the
				  requirements of the Standard Hose Connection Specifications, 1957, Compressed
				  Gas Association.
(5) Hose
				  connections must be clamped or otherwise securely fastened so they will
				  withstand, without leakage, twice the pressure to which they are normally
				  subjected in service, but never less than a pressure of 300 psi. Oil-free air
				  or an oil-free inert gas must be used for the test.
(6) Hose showing leaks, burns, worn places,
				  or other defects rendering it unfit for service must be repaired or
				  replaced.
97-09-013, recodified as § 296-307-48051, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48051, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48053 - Pressure-reducing regulators

Current through Register Vol. 24-14, July 15, 2024
(1)
				  Pressure-reducing regulators must be used only for the gas and pressures for
				  which they are intended. The regulator inlet connections must meet the
				  requirements of the Regulator Connection Standards, 1958, Compressed Gas
				  Association.
(2) When regulators or
				  parts of regulators, including gauges, need repair, the work must be performed
				  by skilled mechanics who have been properly instructed.
(3) Gauges on oxygen regulators must be
				  marked "USE NO OIL."
(4) Union nuts
				  and connections on regulators must be inspected before use to detect faulty
				  seats that may cause leakage of gas when the regulators are attached to the
				  cylinder valves. Damaged nuts or connections must be destroyed.
97-09-013, recodified as § 296-307-48053, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48053, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-485 - Installation and operation of resistance welding equipment

Current through Register Vol. 24-14, July 15, 2024
97-09-013, recodified as § 296-307-485, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-485, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48501 - Resistance welding equipment

Current through Register Vol. 24-14, July 15, 2024
(1) All equipment must be installed by a
				  qualified electrician according to the requirements of chapter 296-307 WAC Part
				  T. There must be a safety-type disconnecting switch or a circuit breaker or
				  circuit interrupter to open each power circuit to the machine, conveniently
				  located at or near the machine, so that the power can be shut off when the
				  machine or its controls are to be serviced.
(2) Ignitron tubes used in resistance welding
				  equipment must have a thermal protection switch.
(3) Employees designated to operate
				  resistance welding equipment must have been properly instructed and judged
				  competent to operate such equipment.
(4) Controls of all automatic or air and
				  hydraulic clamps must be arranged or guarded to prevent the operator from
				  accidentally activating them.
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-48501,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-48501,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48501, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48503 - Portable welding machines

Current through Register Vol. 24-14, July 15, 2024
(1)
				  All portable welding guns must have suitable counter-balanced devices for
				  supporting the guns, including cables, unless the design of the gun or fixture
				  makes counterbalancing impractical or unnecessary.
(2) All portable welding guns, transformers,
				  and related equipment that is suspended from overhead structures, eye beams, or
				  trolleys must have safety chains or cables. Safety chains or cables must be
				  able to support the total shock load in the event of failure of any component
				  of the supporting system.
(3) When
				  trolleys are used to support portable welding equipment, they must have
				  suitable forged steel clevis for the attachment of safety chains. Each clevis
				  must be able to support the total shock load of the suspended equipment in the
				  event of trolley failure.
(4) All
				  initiating switches, including retraction and dual schedule switches, located
				  on the portable welding gun must have suitable guards able to prevent
				  accidental initiation through contact with fixturing, operator's clothing, etc.
				  Initiating switch voltage must be a maximum of 24 volts.
(5) The movable holder, where it enters the
				  gun frame, must have enough clearance to prevent the shearing an operator's
				  fingers if placed on the operating movable holder.
(6) The secondary and case of all portable
				  welding transformers must be grounded. Secondary grounding may be by center
				  tapped secondary or by a center tapped grounding reactor connected across the
				  secondary.
97-09-013, recodified as § 296-307-48503, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48503, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48505 - Flash welding equipment

Current through Register Vol. 24-14, July 15, 2024
(1)
				  Flash welding machines must have a hood to control flying flash. In cases of
				  high production, where materials may contain a film of oil and where toxic
				  elements and metal fumes are given off, ventilation must be provided according
				  to WAC
				  296-307-50009
				  through
				  296-307-50029.
(2) For the protection of the operators of
				  nearby equipment, fire-resistant curtains or suitable shields must be set up
				  around the machine and in such a manner that the operator's movements are not
				  hampered.
(3) If the welding
				  process cannot be isolated, anyone who may be exposed to the hazard of arc
				  flash must be properly protected.
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-48505,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-48505,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48505, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48507 - Job hazard analysis

Current through Register Vol. 24-14, July 15, 2024
A qualified person must perform a job hazard analysis on
					 the operations to be performed on each welding machine to determine the
					 safeguards and personal protective equipment that must be used for each
					 job.
97-09-013, recodified as § 296-307-48507, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48507, filed 10/31/96, effective
						12/1/96.
Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part V - Welding › Section 296-307-48509 - Maintenance of resistance welding equipment

Current through Register Vol. 24-14, July 15, 2024
Qualified maintenance personnel must periodically inspect
					 the equipment and maintain records of the inspections. The operator must be
					 instructed to report any equipment defects to the supervisor and the use of the
					 equipment must be discontinued until safety repairs have been
					 completed.
97-09-013, recodified as § 296-307-48509, filed
						4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040,[49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-48509, filed 10/31/96, effective
						12/1/96.