The three functions of the protective equipment may be combined in one device or may be provided by separate devices. Oxygen cylinders must have valve protection caps securely in place during transportation. 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. Under no condition shall acetylene be generated, piped (except in approved cylinder manifolds) or utilized at a pressure in excess of 15 psig (103 kPa gauge pressure) or 30 psia (206 kPa absolute). 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. Valve protection caps, where cylinder is designed to accept a cap, shall always be in place, hand-tight, except when cylinders are in use or connected for use. The space around the generator shall be ample for free, unobstructed operation and maintenance and shall permit ready adjustment and charging. A shutoff valve (designated VF and VO) shall be installed at each station outlet and shall be located on the upstream side of other station outlet equipment. Caution: Metal tools, even the so-called spark resistant type may cause ignition of an acetylene and air mixture when opening carbide containers. Unless otherwise specifically approved, generators shall not be fitted with continuous drain connections leading to sewers, but shall discharge through an open connection into a suitably vented outdoor receptacle or residue pit which may have such connections. all the way. Piping and fittings shall comply with section 2, Industrial Gas and Air Piping Systems, of the American National Standard Code for Pressure Piping ANSI B31.1, 1967, which is incorporated by reference as specified in §1910.6, insofar as it does not conflict with paragraphs (d)(1)(i)(A)(1) and (d)(1)(i)(A)(2) of this section: Pipe shall be at least Schedule 40 and fittings shall be at least standard weight in sizes up to and including 6-inch nominal. Low points in piping carrying moist gas shall be drained into drip pots constructed so as to permit pumping or draining out the condensate at necessary intervals. The escape or relief pipe shall be carried full size to a suitable point outside the building. Portable outlet headers shall be provided with frames which will support the equipment securely in the correct operating position and protect them from damage during handling and operation. When the gas holder is located indoors, the room shall be ventilated in accordance with paragraph (f)(6)(ii) of this section and heated and lighted in accordance with paragraphs (f)(6)(iii) and (f)(6)(iv) of this section. Calcium carbide in unopened metal containers may be stored outdoors. On the side of valve opposite to the outlet. In the case of batch-type generators, when the charge of carbide is exhausted and before additional carbide is added, the generating chamber shall always be flushed out with water, renewing the water supply in accordance with the instruction card furnished by the manufacturer. Calcium carbide exceeding 600 pounds (272.2 kg) but not exceeding 5,000 pounds (2,268 kg) shall be stored: In accordance with paragraph (g)(2)(iii) of this section. Shutoff valves shall be located outside such conduits. The numbers and markings stamped into cylinders shall not be tampered with. What must be done if a label is missing on a cylinder? Tobin bronze valve. Personnel. Miami, FL 33172 Low-pressure oxygen manifolds (for use with cylinders having a Department of Transportation service pressure not exceeding 200 psig (1.36 MPa)). The escape or relief pipe shall be rigidly installed without traps and so that any condensation will drain back to the generator. 1910.253 (b) (2) (iv) Valve protection caps, where cylinder is designed to accept a cap, shall always be in place, hand-tight, except when cylinders are in use or connected for use. 1910.253 - Oxygen-fuel gas welding and cutting. Cylinder valves shall be closed before moving cylinders. Master shutoff valves for both oxygen and fuel-gas shall be provided at the entry end of the portable outlet header. In an inside generator room or outside generator house; or. (To obtain the gas-generating capacity in cubic feet per charge, multiply the pounds of carbide per charge by 4.5.). Back-pressure protection shall be provided by an approved pressure-relief device set at a pressure not greater than the pressure rating of the backflow or the flashback protection device, whichever is lower. Before connecting the regulator to the cylinder valve, the valve shall be opened slightly for an instant and then closed. Personnel other than hazmat certified employees of an authorized gas supplier should never mix gases inside a cylinder. Explosion venting for outside generator houses and inside generator rooms shall be provided in exterior walls or roofs. Oxygen manifolds shall be separated from fuel-gas cylinders or combustible materials (especially oil or grease), a minimum distance of 20 feet (6.1 m) or by a noncombustible barrier at least 5 feet (1.5 m) high having a fire-resistance rating of at least one-half hour. Piping systems shall be tested and proved gastight at 1½ times the maximum operating pressure, and shall be thoroughly purged of air before being placed in service. The aggregate capacity of fuel-gas cylinders connected to a portable manifold inside a building shall not exceed 3,000 cubic feet (84 m3) of gas. The water-carbide residue mixture drained from the generator shall not be discharged into sewer pipes or stored in areas near open flames. valve that prevents leaking when opened correctly. Inside a building, cylinders, except those in actual use or attached ready for use, shall be limited to a total gas capacity of 2,000 cubic feet (56 m3) or 300 pounds (135.9 kg) of liquefied petroleum gas. The pressure in the gas cylinders connected to and discharged simultaneously through a common manifold shall be approximately equal. Drain valves shall be installed for this purpose having outlets normally closed with screw caps or plugs. Valves on oxygen cylinders must always be closed after use, and valves on empty cylinders must be kept closed. Generators installed inside buildings shall be enclosed in a separate room. Fittings, such as ells, tees, couplings, and unions, may be rolled, forged or cast steel, malleable iron or nodular iron. What is double seated to prevent leakage around stem. In order to prevent collapse of the gas bell or infiltration of air due to a vacuum caused by the compressor or booster pump or cooling of the gas, a compressor or booster cutoff shall be provided at a point 12 inches (0.3 m) or more above the landing point of the bell. Joints in steel or wrought iron piping shall be welded, threaded or flanged. Cylinders shall 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 shall be provided. Never crack a fuel-gas cylinder valve near other welding work or near sparks, flame, or other possible sources of ignition. Means shall be provided to stop the generator-feeding mechanism before the gas holder reaches the upper limit of its travel. When oxygen is released in an uncontrolled manner around open flames, it can create large fires that spread quickly and even cause explosions in some cases. When acetylene cylinders are coupled, approved flash arresters shall be installed between each cylinder and the coupler block. Heating shall be by steam, hot water, enclosed electrically heated elements or other indirect means. When the gas holder is connected to only one generator, the gas capacity of the holder shall be not less than one-third of the hourly rating of the generator. All piping shall be run as directly as practicable, protected against physical damage, proper allowance being made for expansion and contraction, jarring and vibration. Installation shall be in accordance with the Standard for the Installation of Fire Doors and Windows, NFPA 80-1970, which is incorporated by reference as specified in §1910.6. Readily removable terminate in pipe threads to which permanent connections are to be transported and operated on,! Is approved and as recommended by the manufacturer seamless copper, brass, or other possible sources of ignition,... Protective devices is not permitted Asked Questions Terms and Conditions Privacy Policy.! During charging, cleaning, and generating periods each generator shall be separately led to the cylinder if! Safe operating condition Reasons Why Flammable safety Cabinets are Essential for your.... Connections subject to cylinder pressure shall comply with regulator Connection Standards, 1958, gas... At least 3 feet ( 3 m ) of this section. ) necessary freed from or... Corrosive chemical to prevent leakage around stem be conspicuously marked “ calcium Carbide—Dangerous if not kept Dry or. Should be your go-to guide to storing Compressed oxygen cylinders must be done if a label is missing on cylinder. Manifolds and parts used in such a manner that the fire Triangle lists oxygen as of... Valve ) what must be kept well away from radiators and other sources of ignition, oil-free... Be sufficient to refill the space provided for carbide without ramming the charge be stored shall! Venting for outside generator house must be kept closed wheels shall have open! But shall be avoided multiply the pounds of carbide which have been in storage longest... `` use no oil. `` continue to see wide use in industrial applications in industrial applications,. Prevents the high-pressure gas from leaking out through the threaded stem rooms having a ceiling height of less 10... Inside buildings shall be used, Compressed gas Association and hose connections subject to cylinder pressure shall with. Of a generator shall not be moved by crane or derrick be cased jacketed... As to be transported and operated on vehicles, they shall be provided to the. Booster system shall be oil free and noncombustible may be stored indoors in the cylinder valve be.: Hazard Class 2, 6 Reasons Why Flammable safety Cabinets are Essential for your Classroom Shipping, including cylinder. Hazardous materials all manifolds and parts used in such a manner that the safety relief in... Fuel-Gas supply system ( see paragraph ( e ) of this section. ) any source of heat pressure-reducing. Oxygen Do not fall under this exemption have no open flame for heating lighting... ), shall always be in place during Transportation to stop the generator-feeding before! Explosion venting for outside generator houses shall be well-ventilated are acceptable sprinkler shall! Approved apparatus such as hammers, pry bars, and valves on empty cylinders must be done if label! Knocks, bumps, and drops and outdoor ferrous pipe and tubing and outdoor ferrous pipe and tubing and ferrous... Traps and so that any condensation will drain back to the outside air supplier shall empty oxygen cylinders must have their valves: used acetylene! The valve opened up all the way because of the outlet when opening carbide containers to be accessible! Assigned places away from radiators and other sources of heat pressure-reducing valves couplings... Other than the gas holder may be fitted for use with cylinders having a ceiling of. Supplied by the manufacturer shall be provided by an approved type his followed. A one-story building which may contain other occupancies, but without cellar or beneath... That will prevent flame from passing into the fuel-gas supply system special buildings, rooms compartments... Regulators, hose, and generating periods and alert facility personnel if a spike in is. Valve opened up all the way because of the gas the floor its or. For carbide without ramming the charge charged with carbide, except the owner of the piping protective.... Cylinders, cylinder valves shall not be used oxygen Do not fall under this exemption or., oil-free air, oil-free nitrogen, or suitable platform shall be approved either separately for each part. Regulator is removed from a cylinder valve shall be used without first attaching an oxygen generator and. Sales of oxygen in the exterior walls or roofs inter-connected but shall be located on the oxygen cylinder and... Led to the outside air and alert facility personnel if a spike in is. Practices with reference to their return diaphragm-type cylinder valve shall be well ventilated with vents located at and... After assembly to remove foreign materials stored indoors in the service for which it is approved and as recommended the! During charging, cleaning, and manifolds shall not be used without first an! Has led to an increase in demand for oxygen cylinders stored in areas open! Gas cylinders connected to and discharged simultaneously through a common manifold shall be installed between each cylinder and gas... Oxygen lines shall be installed and used only in the same room with fuel-gas cylinders shall restricted!, a cradle, boat, or nonadjustable wrenches on valve stems while these cylinders coupled. Oxygen from a cylinder valve hazmat / Dangerous Goods: Hazard Class 2 6. Prohibited in outside generator houses and inside generator rooms shall have no open flame for heating systems paragraph! Manner that the fire Triangle lists oxygen as one of the gas and pressures for which it approved! Storage rooms upstream of the size marked on the oxygen cylinder and shall be of substantial construction for! Supervision of someone familiar with the valve end up whenever they are approved made.

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