CNSM SAFETY OFFICE INSTRUCTIONS INSTRUCTIONS (Cont.) GENERAL HAZARDS OF COMPRESSED GAS GENERAL HAZARDS OF COMPRESSED GAS

CNSM SAFETY OFFICE INSTRUCTIONS INSTRUCTIONS (Cont.) GENERAL HAZARDS OF COMPRESSED GAS GENERAL HAZARDS OF COMPRESSED GAS www.phwiki.com

CNSM SAFETY OFFICE INSTRUCTIONS INSTRUCTIONS (Cont.) GENERAL HAZARDS OF COMPRESSED GAS GENERAL HAZARDS OF COMPRESSED GAS

Steigerwald, Julie, Morning Executive Producer has reference to this Academic Journal, PHwiki organized this Journal CNSM SAFETY OFFICE COMPRESSED GAS, LIQUID NITROGEN AND DRY ICE TRAINING INSTRUCTIONS You have downloaded a copy of this power point presentation in addition to a test. First, view this slide show. Second, print out in addition to take the test. Lastly, contact the CNSM Safety office via email (jdlc@csulb.edu or chris.frost@csulb.edu) or phone 562 985-5623 to arrange a h in addition to s-on training test. Bring the completed written test with you. H in addition to s on training runs the first Wednesday of the month at 1:00 PM. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING INSTRUCTIONS (Cont.) This slideshow is designed to provide initial in as long as mation on compressed gas training. This training is not complete until you take a written test AND attend a h in addition to s-on skills test. Your supervisor will provide further task or equipment-specific training as to how to use compressed gas as long as your particular situation. This presentation is best viewed in “Slide Show” mode. (click on “Slide Show” on toolbar in addition to then click “From Current Slide”.) CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING

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Compressed gases present a unique hazard. Depending on the particular gas, there is a potential as long as simultaneous exposure to both mechanical in addition to chemical hazards. Gases may be: Flammable or combustible Explosive Corrosive Poisonous Inert or a combination of hazards GENERAL HAZARDS OF COMPRESSED GAS CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING GENERAL HAZARDS OF COMPRESSED GAS Cylinders are heavy-approx. empty wt=117 lbs. (53 Kg) Cylinders are under high pressure (2200 psi) when full. The contents may act as an asphyxiant when released into a confined space. Some cylinders contain hazardous chemicals—know the gas you are working with, see Safety Data Sheet. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING GENERAL HAZARDS OF COMPRESSED GAS USE Carbon Monoxide gas Some cylinders contain hazardous chemicals—know the gas you are working with, see Safety Data Sheet. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING

GENERAL HAZARDS OF COMPRESSED GAS USE Compressed gas cylinders are under high pressure (2200 psi) when full. CO2 cylinders at around 800 to 900 psi when full. pressurized cylinders can act as missiles when mish in addition to led or in the event of an accident. See “Mythbusters” episode on YouTube. http://www.youtube.com/watchv=ejEJGNLTo84 Never open a valve or install a regulator on a cylinder that is corroded or in poor condition. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING HAZARDS OF SPECIFIC COMPRESSED GASES Compressed Oxygen (O2) poses special risks due to its propensity to accelerate combustion. Traces of gas remain in regulators after use. Oxygen cylinders use a unique regulator to ensure that a regulator with traces of flammable or other incompatible gases cannot be installed. Even traces of incompatible gas can produce a chemical reaction leading to explosion in addition to /or fire. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING HAZARDS OF SPECIFIC COMPRESSED GASES Make certain you “USE NO OIL” on any component of a compressed gas setup—valve, regulator, cap threads. If compressed O2 comes into contact with oil, a fire or explosion may occur. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Use NO OIL!

Oxygen cylinders, full or empty, shall not be stored in the same vicinity as flammable gases. The proper storage as long as oxygen cylinders requires that a minimum of 20 feet be maintained between flammable gas cylinders in addition to oxygen cylinders or the storage areas be separated, at a minimum, by a fire wall five feet high with a fire rating of 0.5 hours. Greasy in addition to oily materials shall never be stored around oxygen; nor may oil or grease be applied to fittings. High pressure oxygen can ignite them. HAZARDS OF SPECIFIC COMPRESSED GASES CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Cylinders containing flammable gases such as hydrogen or acetylene must not be stored in close proximity to open flames, areas where electrical sparks are generated, or where other sources of ignition may be present. Cylinders containing acetylene shall never be stored on their side. HAZARDS OF SPECIFIC COMPRESSED GASES CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING OTHER GAS FACTS CO2 comes in two different types of cylinders. Most applications use the non-siphon type of cylinder. Make sure you use the correct cylinder. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Use this type as long as CO2 gas This used only as long as special applications

The Parts of a Gas System CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Cylinder Contents Label Valve with h in addition to wheel Safety Cap Never rely on the color of the cylinder as long as identification. Color coding is not reliable because cylinder colors may vary with the supplier. The factory label uses internationally st in addition to ardized markings in addition to colors. Always read the label! How to Determine Which Gas is In the Cylinder: CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Signs should be conspicuously posted in areas where flammable compressed gases are stored, identifying the substances in addition to appropriate precautions (e.g., HYDROGEN – FLAMMABLE GAS – NO SMOKING – NO OPEN FLAMES). IDENTIFICATION CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING 25

VALVES & REGULATORS St in addition to ard cylinder-valve outlet connections have been devised by the Compressed Gas Association (CGA) to prevent mixing of incompatible gases. The outlet threads used vary in diameter; some are internal, some are external; some are right-h in addition to ed, some are left-h in addition to ed. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Note different thread types on these two regulators. Regulators are gas specific in addition to not necessarily interchangeable! Always make sure that the regulator in addition to tank valve fittings are a perfect match. Never make an adaptor that changes the threads of a regulator – that will bypass the critical factory safety feature. VALVES & REGULATORS CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Note different thread types on these two regulators. If there is any question as to the suitability of a regulator as long as a particular gas, check with the Safety Office. VALVES & REGULATORS CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING

The following rules relating to gas lines from the cylinder to the use area (outlet) shall be followed: When a gas cylinder is distant from the outlet location, the distribution lines in addition to their outlets must be clearly labeled to identify type of gas contained. Gas lines must be inspected as long as damage, degradation in addition to leaks on a regular basis. Special attention should be given to metal lines in addition to fittings as cracks commonly develop in use. GAS LINES AND TUBING CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING A cylinder should never be emptied to a pressure lower than 25 psi. At lower pressures, the tank contents can suck in air; contaminating contents. When work involving a compressed gas is completed, the cylinder must be turned off, in addition to if possible, the lines drained of gas so that regulator gauge(s) display ZERO. CYLINDERS CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING When the cylinder needs to be removed or is empty, all valves shall be closed, the system bled, the regulator removed in addition to the cylinder valve safety cap installed. Note: make sure the valve cap threads match the threads on the cylinder. It’s always a good idea to mark the cylinder “empty“ when it reaches 25 psi so all gas users are alerted that the tank is empty. Promptly return empty cylinders to the gas storage area so that it can be refilled as long as use by others. Gas deliveries in addition to empties are returned as long as refill weekly. CYLINDERS CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING

Liquid bulk tanks (called dewars – usually with 160 L capacity, see next slide as long as picture) are used to provide liquid nitrogen. They may also be used to supply gas, when a high volume of gas is needed. A special cart is used to transport these. These tanks usually have a number of valves in addition to outlet fittings on the top. Make sure you hook up to the one marked “Gas Use” or “Liquid” as appropriate. These tanks always must periodically vent their contents to prevent dangerous pressure buildup. Loud hissing in addition to vapor plumes are normal. Locate these tanks where there is adequate ventilation in addition to where the noise is not a problem. BULK TANKS CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING BULK TANKS CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Always use safety glasses, goggles or a face shield when h in addition to ling in addition to using compressed gases, especially when connecting in addition to disconnecting compressed gas regulators in addition to lines. Use work gloves in addition to sturdy shoes when moving cylinders. PPE CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING

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HANDLING AND USE OF COMPRESSED GAS CYLINDERS (REQUIRES SKILL TEST) Never leave a cylinder unchained or unsecured. Safety cap must be in place when moving a cylinder in addition to when cylinder not in use. Make sure you are using correct safety cap. Two thread types; coarse or fine. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING HANDLING AND USE Cylinders are heavy (approx. empty wt=117 lbs, 53 Kg) Use gloves in addition to appropriate footwear when h in addition to ling. Make sure safety cap is in place when ever you move or unchain a cylinder. Cylinders should never be rolled or dragged. A cart must be used when transporting a cylinder more than a few feet. Make sure to sign out on log sheet when taking gas. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Cylinder Cart INSTALLING A REGULATOR (REQUIRES SKILL TEST) Make sure cylinder is securely fastened to bench or rack be as long as e removing safety cap Use only regulators specifically designed as long as use with your cylinder. CGA 580 as long as N2, Ar, He. CGA 320 as long as CO2 etc. Never use adaptor on regulator unless you check with the safety office first. Wear safety glasses when opening valve. USE NO OIL, WD40 etc. on any part of valve, regulator or safety cap. Fires can result! Teflon tape not needed on regulator threads. After securing cylinder, remove safety cap Remove shrink wrap (or valve plug) Screw regulator into valve, h in addition to tight Finish tightening with wrench

INSTALLING A REGULATOR (REQUIRES SKILL TEST) Wear safety glasses when opening valve. Open valve carefully! One full turn. Use soapy water to check as long as leaks. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING Carefully open valve Check as long as leaks with soap solution Don’t use Teflon tape when Installing regulators. LIQUID NITROGEN AND DRY ICE 160 Liter Liquid Nitrogen Dewars Three main hazards associated with liquid nitrogen (LN2). Cold-burn—LN2 will cause damage to eyes in addition to unprotected skin due to very cold temperature (-196C) Asphyxiation death – As LN2 boils, the resulting N2 gas can rapidly displace air—particularly in an enclosed space such as a small room or car. LN2 container explosion—LN2 stored in an air-tight container may cause explosion of the container due to expansion of gas as the liquid boils. Glass double walled containers used as long as LN2 storage must have safety tape wrapped around the outside. CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING LIQUID NITROGEN AND DRY ICE LN2 Protective equipment The appropriate personal protective equipment to wear when h in addition to ling or dispensing LN2 includes: shoes, long pants, long sleeve shirt, sweatshirt or lab coat, chemical splash goggles, face shield in addition to special cryogenic gloves (often blue in color). CNSM COMPRESSED GAS, LIQUID NITROGEN TRAINING

Cylinder tied only With a rubber hose

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