The hood or bend shall be so constructed that it will not be obstructed by rain, snow, ice, insects, or birds. It shall terminate in a hood or bend located at least 12 feet (3.7 m) above the ground, preferably above the roof, and as far away as practicable from windows or other openings into buildings and as far away as practicable from sources of ignition such as flues or chimneys and tracks used by locomotives. The fuel-gas and oxygen piping systems, including portable outlet headers shall incorporate the protective equipment shown in Figures Q-1, Q-2, and Q-3. Exit doors shall be located so as to be readily accessible in case of emergency. Cylinder valves shall not be tampered with nor should any attempt be made to repair them. Each service outlet on portable outlet headers shall be provided with a valve assembly that includes a detachable outlet seal cap, chained or otherwise attached to the body of the valve. DOT-4L200 cylinders have safety devices which relieve at a maximum pressure of 250 psig (1.7 MPa) (or 235 psig (1.6 MPa) if vacuum insulation is used). . Store all cylinders in designated areas that are secured. OSHA 29 CFR 1910.101 Compressed Gases (General Requirements) . Means shall be provided to stop the generator-feeding mechanism before the gas holder reaches the upper limit of its travel. Hose shall have a minimum bursting pressure of 1,000 psig (6.8 MPa). Backflow protection shall be provided by an approved device that will prevent oxygen from flowing into the fuel-gas system or fuel from flowing into the oxygen system (see SF, Figures Q-1 and Q-2). Acetylene generators shall be grounded. Read the code on FindLaw. 1910.253 - Oxygen-fuel gas welding and cutting. - 04/27/1994. Except when generators are prepared in accordance with paragraph (f)(7)(v) of this section, sources of ignition shall be prohibited in outside generator houses or inside generator rooms. For Legal Professionals. Therefore, the cylinder containing 20.9% oxygen would not be considered an oxygen cylinder or an oxidizing compressed gas for the purposes of 29 CFR 1910.101. A stamped hydrostatic test date within the last five years. Appropriate care in the handling and storage of compressed gas cylinders is essential and information is provided below. If cylinders are found to have leaky valves or fittings which cannot be stopped by closing of the valve, the cylinders shall be taken outdoors away from sources of ignition and slowly emptied. 1910.6. Cylinders not having fixed hand wheels shall have keys, handles, or nonadjustable wrenches on valve stems while these cylinders are in service. 1917.152, Welding, cutting and heating (hot work) (See also 1917.2, definition of Hazardous cargo, materials, substance, or atmosphere). Never crack a fuel-gas cylinder valve near other welding work or near sparks, flame, or other possible sources of ignition. While methane is an asphyxiant, it does not produce the acute or chronic health effects described in 1910.1200 Appendix A to which the lab standard refers. Gas cylinders should be properly secured at all times to prevent tipping, falling or rolling. Each outlet on the service piping from which oxygen or fuel-gas is withdrawn to supply a portable outlet header shall be equipped with a readily accessible shutoff valve. The valve shall be opened while standing to one side of the outlet; never in front of it. Nothing shall be placed on top of an acetylene cylinder when in use which may damage the safety device or interfere with the quick closing of the valve. Aboveground piping systems shall be marked in accordance with the American National Standard Scheme for the Identification of Piping Systems, ANSI A13.11956, which is incorporated by reference as specified in 1910.6. Note: The directives in this list provide additional information that is not necessarily connected to a specific OSHA standard highlighted on this Safety and Health Topics page. 1910.101 - Compressed gases (general requirements). For other piping, air or inert gas may be used. . OSHA 1910.101(b), NFPA 1, and the CGA Pamphlet P1-1965 each outline requirements for storage and handling of compressed gases. Service piping systems shall 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. Manifolds shall be approved either separately for each component part or as an assembled unit. Applicability of compressed gas cylinder standard to workplaces subject to the Hazardous Waste Operations and Emergency Response Standard (June 05, 1992). Fuel-gas cylinders shall be placed with valve end up whenever they are in use. Other sources of information regarding storage of LP gas cylinders can be obtained from OSHA Standard 29 CFR 1910.101 which covers general requirements regarding compressed gases. The in-plant handling, storage, and utilization of all compressed gases in cylinders, portable tanks, rail tank cars, or motor vehicle cargo tanks shall be in accordance . OSHA's laboratory standard, 1910.1450, Occupational exposure to hazardous chemicals in laboratories, defines "hazardous chemical" as one that has been established to produce acute or chronic health effects in exposed employees. Packages of calcium carbide, except for one of each size, shall be kept sealed. Approved protective equipment (designated PF in Figures Q-1, Q-2, and Q-3) shall be installed in fuel-gas piping to prevent: Backflow of oxygen into the fuel-gas supply system; Passage of a flash back into the fuel-gas supply system; and. More than one such manifold with connected cylinders may be located in the same room provided the manifolds are at least 50 feet (15 m) apart or separated by a noncombustible barrier at least 5 feet (1.5 m) high having a fire-resistance rating of at least one-half hour. The standard, at 29 CFR 1910.101(a), requires that gas cylinders be visually inspected to determine that they are in safe condition.1 (See paragraph (e) of this section.). Standard for Visual Inspection of Compressed Gas Cylinders : . Compressed gas cylinders, portable tanks, and cargo tanks shall have pressure relief devices installed and maintained in accordance with Compressed Gas Association Pamphlets S-1.1-1963 and 1965 addenda and S-1.2-1963, which is incorporated by reference as specified in 1910.6. Storage of Compressed Gas Cylinders 3.1 New Cylinders When a gas cylinder is received, it shall be visually inspected for the following: A. The low-pressure protective device shall be located between the gas holder and the shop piping, and the medium-pressure protective device shall be located between the compressor or booster pump and the shop piping (see Figure Q-4). Oxygen piping and fittings shall be washed out with a suitable solution which will effectively remove grease and dirt but will not react with oxygen. Generator water chambers shall be kept filled to proper level at all times except while draining during the recharging operation. Inert gases (Argon, Nitrogen, Helium, Carbon Dioxide), since . Heating by flames or fires shall be prohibited in outside generator houses or inside generator rooms, or in any enclosure communicating with them. Calcium carbide exceeding 600 pounds (272.2 kg) but not exceeding 5,000 pounds (2,268 kg) shall be stored: In an inside generator room or outside generator house; or. ." We note that there are more recent versions of the industry consensus standards that are referenced in 1910.101.2 If the more recent consensus standards address hazards associated with compressed gases that are not addressed in the CGA pamphlets referenced in the standard, 1910.101, 1910.1200, or any other applicable OSHA standard, the more recent consensus standards may provide support for a citation alleging a violation of the OSH Act's general duty clause, 29 USC 651(a)(1). The 30 psia (206 kPa absolute) limit is intended to prevent unsafe use of acetylene in pressurized chambers such as caissons, underground excavations or tunnel construction.) Carbide containers to be stored outdoors shall be examined to make sure that they are in good condition. Pressure relief devices. They shall have a minimum bursting pressure of 1,000 psig (6.8 MPa) and shall be protected by a safety relief device which will relieve at a maximum pressure of 500 psig (3.4 MPa). Storing When storing compressed cylinders, AWS recommends . Compressed gas cylinders, portable tanks, and cargo tanks shall have pressure relief devices installed and maintained in accordance with Compressed Gas Association Pamphlets (CGA) S-1.1-1963 and 1965 addenda and S-1.2-1963. Apparatus. Supplier's instructions as to its disposition shall be followed. Lamps installed outside of wired-glass panels set in gas-tight frames in the exterior walls or roof of the generator house or room are acceptable. 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, provided each outlet from such piping is equipped with a shutoff valve and provided the fuel-gas capacity of any one torch does not exceed 15 cubic feet (0.42 m3) per hour. All acetylene shall be expelled by completely flooding the generator shell with water and the generator shall be disconnected from the piping system. After assembly, piping shall be thoroughly blown out with air, nitrogen, or carbon dioxide to remove foreign materials. [55 FR 13696, Apr. . Hazards associated with compressed gases include oxygen displacement, fires, explosions, and toxic gas exposures, as well as the physical hazards associated with high pressure systems. No person, other than the gas supplier, shall attempt to mix gases in a cylinder. In multiple cylinder installations only one key or handle is required for each manifold. Compressors and booster pump equipment shall be located in well-ventilated areas away from open flames, electrical or mechanical sparks, or other ignition sources. Portable generators shall be located at a safe distance from the welding position so that they will not be exposed to sparks, slag, or misdirection of the torch flame or overheating from hot materials or processes. This letter constitutes OSHA's interpretation of the requirements discussed. Standard for Visual Inspection of Steel Compressed Gas Cylinders : Compressed Gas Association: Occupational Safety and Health Administration : 29 CFR 1910.103(c)(1)(iv)(A)(2) CGA S-1.1: 1963 : Safety Release Device Standard--Cylinders for Compressed Gases : Compressed Gas Association: Labor Department : 41 CFR 50-204.68 The vent from the pressure-relief device shall be at least as large as the relief device inlet and shall be installed without low points that may collect moisture. Specific guidance on the safe storage and handling of gases in cylinders is available from various Australian standards related to gases in cylinders including: AS4332: The storage and handling of gases in cylinders. Note: The letters in this list provide additional information that is not necessarily connected to a specific OSHA standard highlighted on this Safety and Health Topics page. The latest gas cylinder safety regulations and guidelines are provided by these organizations: CGA (Compressed Gas Association) distributes . High-pressure fuel-gas manifolds shall be provided with approved pressure regulating devices. The space around the generator shall be ample for free, unobstructed operation and maintenance and shall permit ready adjustment and charging. The three functions of the protective equipment may be combined in one device or may be provided by separate devices. Thank you for your interest in occupational safety and health. osha.oregon.gov Salem entral Ofce 350 Winter St. Salem OR 730-32 hone: 503-37-3272 Toll-free: 00-22-26 a: 503-47-746 Oxy-Fuel Gas Cylinder Storage Oxy-Fuel Gas Cylinder Storage OAR 437 Division 2/Q Division 3/J You must properly store oxygen and fuel-gas cylinders used for welding, cutting, brazing, soldering, and thermal spraying when they are . The cylinder valve shall always be opened slowly. Such a manifold, if located inside a building having other occupancy, shall 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 (6.1 m) of the manifold. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Generators shall be of approved construction and shall be plainly marked with the maximum rate of acetylene in cubic feet per hour for which they are designed; the weight and size of carbide necessary for a single charge; the manufacturer's name and address; and the name or number of the type of generator. The Occupational Safety and Health Administration (OSHA) references general requirements for compressed gasses in 29 CFR 1910.101. Follow these operational requirements: Label both the cylinder and gas line with the name of the gas. shoulder of the cylinder; OSHA Standard 29 CFR 1910.253 (b) (1) (ii). Hose shall have a minimum bursting pressure of 1,000 psig (6.8 MPa). No device or attachment facilitating or permitting mixtures of air or oxygen with flammable gases prior to consumption, except at the burner or in a standard torch, shall be allowed unless approved for the purpose. Storage of Compressed Gas Cylinders, including during use, must be designed to prevent prevent tipping, falling or rolling . Unless specifically approved for use in atmospheres containing acetylene, such lamps shall be provided with enclosures of glass or other noncombustible material so designed and constructed as to prevent gas vapors from reaching the lamp or socket and to resist breakage. ASTM D 5631 : 2015 : REDLINE. Valve-protection caps are designed to protect cylinder valves from damage. If the storage building is of noncombustible construction, it may adjoin other one-story buildings if separated therefrom by unpierced firewalls; if it is detached less than 10 feet (3 m) from such building or buildings, there shall be no opening in any of the mutually exposing sides of such buildings within 10 feet (3 m). This partition shall be without openings and shall be gastight. High-pressure oxygen manifolds shall be provided with approved pressure-regulating devices. Read the Safety Data Sheet and label information before starting work with a new material.. B. Piping shall be steel, wrought iron, brass or copper pipe, or seamless copper, brass or stainless steel tubing, except as provided in paragraphs (d)(1)(ii) and (d)(1)(iii) of this section. Complete removal of the stem from a diaphragm-type cylinder valve shall be avoided. Except as provided in paragraph (c)(2)(iv) of this section, oxygen cylinders connected to one manifold shall be limited to a total gas capacity of 6,000 cubic feet (168 m3). Heating shall be by steam, hot water, enclosed electrically heated elements or other indirect means. Approved protective equipment (designated PF) is used to prevent: Backflow of oxygen into the fuel-gas supply system; passage of a flashback into the fuel-gas supply system; and excessive back pressure of oxygen in the fuel-gas supply system. Generating chamber relief pipes shall not be inter-connected but shall be separately led to the outside air. Unless cylinders are secured on a special truck, regulators shall be removed and valve-protection caps, when provided for, shall be put in place before cylinders are moved. Piping shall be thoroughly blown out after assembly to remove foreign materials. Response #2 The cylinder contains 20.9% oxygen and 79.1% nitrogen, which is essentially compressed air.3 While air is technically an oxidizer, compressed air presents no greater oxidation hazard than that of the atmospheric air already present in the workplace. Cylinders shall not be kept in unventilated enclosures such as lockers and cupboards. Storage Requirements. . Such separation walls shall be without openings and shall be joined to the floor, other walls and ceiling or roof in a manner to effect a permanent gas-tight joint. More than one such manifold with connected cylinders may be located in the same room provided the manifolds are at least 50 feet (15 m) apart or separated by a noncombustible barrier at least 5 feet (1.5 m) high having a fire-resistance rating of at least one-half hour. CGA P-3: 1963 : Specifications, Properties, and Recommendations for Packaging, Transportation, Storage and Use of Ammonium Nitrate : Compressed Gas Association: . in a DOT 3AL specification aluminum (6061 alloy) cylinder with a water volume of 6 L. Mixtures are shipped with . The escape or relief pipe shall be carried full size to a suitable point outside the building. Cylinders shall be kept away from radiators, piping systems, layout tables, etc., that may be used for grounding electric circuits such as for arc welding machines. Compressed gas cylinders shall be legibly marked, for the purpose of identifying the gas content, with either the chemical or the trade name of the gas. 1910.253 (b) (1) (iii) Compressed gas cylinders shall be equipped with connections complying with the American National Standard Compressed Gas Cylinder Valve Outlet and Inlet Connections, ANSI B57.11965, which is incorporated by reference as specified in 1910.6. An acetylene cylinder valve shall not be opened more than one and one-half turns of the spindle, and preferably no more than three-fourths of a turn. An open connection for the sludge drawoff is desirable to enable the generator operator to observe leakage of generating water from the drain valve or sludge cock. The storage of compressed gas containers, cylinders, and tanks shall be in accordance with 63.3.2 [55:7.2.1.1] 09/01/1983 September 1983 RCRA/SUPERFUND HOTLINE MONTHLY SUMMARY (RO 12138) Description: Provides a summary of the empty container regulations. Protective equipment, hose, and regulators. The vent terminus shall not endanger personnel or property through gas discharge; shall be located away from ignition sources; and shall terminate in a hood or bend. If the station outlet is connected directly to a hose, the outlet shall terminate in a union connection complying with the Standard Hose Connection Specifications, 1957, Compressed Gas Association, which is incorporated by reference as specified in 1910.6. Response #1: The handling, use, and storage of compressed gas cylinders in applications other than welding and cutting in general industry workplaces is governed by OSHA's Compressed gases standard, 29 CFR 1910.101. Dear Mr. Tricomi: AWS C2.21M/C2.21 : 2015. however, do contain more details about specific compressed gases, including: 1910.102 - Acetylene. Maximum pressure. Compressed gas safety. Electric switches, telephones, and all other electrical apparatus which may cause a spark, unless specifically approved for use inside acetylene generator rooms, shall be located outside the generator house or in a room or space separated from the generator room by a gas-tight partition, except that where the generator system is designed so that no carbide fill opening or other part of the generator is open to the generator house or room during the operation of the generator, and so that residue is carried in closed piping from the residue discharge valve to a point outside the generator house or room, electrical equipment in the generator house or room shall conform to the provisions of subpart S of this part for Class I, Division 2 locations. SARA Title III Sections 311/312 Hazardous Categories (40 CFR 370.21): (To obtain the gas-generating capacity in cubic feet per charge, multiply the pounds of carbide per charge by 4.5.). Safety Release Device Standard--Cylinders for Compressed Gases Addendum : Compressed Gas Association: Occupational Safety and Health Administration : 29 CFR 1910.101(b) CGA P-1: 1965 : Safe Handling of Compressed Gases : Compressed Gas Association: Occupational Safety and Health Administration : 29 CFR 1910.101(a) CGA C-8: 1962 : Standard for . Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. 1910.101; 1910.101; 1926.253; 1910.110; 1910.253; Standards. The total hourly output of a generator shall not exceed the rate for which it is approved and marked. Cabinet capacity: 6 cylinders (33-43 lb) of 12.5" diameter. Also, from time to time we update our guidance in response to new information. Scope: This instruction applies MNOSHA-wide. . 29 CFR 1910.6(k)(9) CGA S-1.2: 1963 : Safety Release Device Standards-Cargo and Portable Tanks for Compressed Gases . Occupational Safety and Health Administration: 29 CFR 1910.37, 29 CFR 1910.101, 29 CFR 1910.103, Title: Number: Author: mcollins Ventilated sides prevent build-up of vapors . Inspection of compressed gas cylinders. Thank you for your letter of September 18, 2007, to the Occupational Safety and Health Administration's (OSHA's) Directorate of Enforcement Programs (DEP). 566-1965. Portable generators shall be cleaned and recharged and the air mixture blown off outside buildings. Transportation of compressed gas chambers (May 05, 1992). Per 29 CFR 1910.101(b), the in-plant handling, storage and utilization of all compressed gas cylinders must be in accordance with CGA Pamphlet P-1 Standard for Safe Handling of Compressed Gases in Containers (revised March 23, 2015). To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov. OSHA requirements are set by statute, standards, and regulations. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or more stringent requirements. . Joints in steel or wrought iron piping shall be welded, threaded or flanged. Special storage, use, and handling precautions are necessary in order to control these hazards. Acetylene and liquefied fuel-gas cylinders shall be manifolded in a vertical position. Where those regulations are not applicable, visual and other inspections shall be conducted in accordance with Compressed Gas Association Pamphlets C-6-1968 and C-8-1962, which is incorporated by reference as specified in 1910.6. If an employer is not in compliance with the requirements of an OSHA standard but is complying with the requirements of a current consensus standard that clearly provides equal or greater employee protection, the violation of OSHA's requirement will be treated as a de minimis violation. The walls, partitions, floors, and ceilings of inside generator rooms shall be of noncombustible construction having a fire-resistance rating of at least 1 hour. Do you operate a warehouse forklift that runs on propane? Cylinders shall not be dropped or struck or permitted to strike each other violently. Compressed gases. The regulations cited apply only to private employers and their employees, unless adopted by a state agency and applied to other groups such as public . No opening in any outside generator house shall be located within 5 feet (1.5 m) of any opening in another building. Astoria, NY 11105 Equipment shall be installed and used only in the service for which it is approved and as recommended by the manufacturer. Standard Practice for Handling, Transportation, and Storage of Halon 1301, Bromotrifluoromethane (CF 3 Br) CGA P2-5 : 2011. . The standard further states, in 1910.101(b), that "the in-plant handling, storage, and utilization of all compressed gases in cylinders . Compliant with NFPA 58 for LPG storage and OSHA 1910.110 regulations. 1910.101 - Occupational health hazards to veterinarians. For oxygen piping, only oil-free air, oil-free nitrogen, or oil-free carbon dioxide shall be used. The in-plant handling, storage, and utilization of all compressed gases in cylinders, portable tanks, rail tankcars, or motor vehicle cargo tanks shall be in accordance with Compressed Gas Association Pamphlet P-1-1965, which is incorporated by reference as specified in 1910.6. Packages containing calcium carbide shall be conspicuously marked Calcium CarbideDangerous If Not Kept Dry or with equivalent warning. Pipe laid underground in earth shall be located below the frost line and protected against corrosion. ( 1.5 m ) of 12.5 & quot ; diameter, since however do! Outside of wired-glass panels set in gas-tight frames in the handling and storage of 1301! 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