Safe Handling f T i of Toxic, Corrosive and
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Safe Handling off Toxic, T i Corrosive and Flammable Gases University of NebraskaNebraska Lincoln Praxair Distribution Inc., Quality Department . Presented by Pam Hendershot Praxair Distribution Inc. Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 1 Safe Handling of Compressed Gases in Cylinders Overview Review some of the dangers of: Flammable Gases Toxic/Corrosive Gases Key Considerations and Best Safety Practices Mitigate Miti t Dangers D Proper Handling Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 2 Safe Handling of Compressed Gases in Cylinders Flammable – Pyrophoric Gas Pyrophoric Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 3 Safe Handling of Compressed Gases in Cylinders Flammable Gas A substance that meets the definition of a compressed gas which: IIs flammable fl bl in i a mixture i t off 13% or less (by volume) with air OR Has a flammable range with air wider than 12%, at atmospheric temp and pressure, regardless of the lower limit Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 4 Safe Handling of Compressed Gases in Cylinders Flammable Gases Acetylene Natural Gas B t Butane P Propane y Ethylene Methane Hydrogen Isobutane Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 5 Safe Handling of Compressed Gases in Cylinders Gases & Locations - UNL Beadle, Filley, Kiesselbach, Othmer, Hamilton, Walter Scott, Animal Science, Hardin, Home Economics, Architecture Hall West….locations might be other than expected! Hydrogen and Hydrogen Mixtures Acetylene , Propylene Others.... Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 6 Safe Handling of Compressed Gases in Cylinders Hydrogen and Fuel Gases Hydrogen y g Is colorless, odorless, tasteless, and highly flammable,, and burns with an invisible flame **Straw broom test Hydrogen mixes Hydrogen mixes: flammable at 4% - 75% by volume Propylene, Propane, Butane, Ethylene Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 7 Safe Handling of Compressed Gases in Cylinders Acetylene Acetylene cylinders have special construction • Cylinders contain a porous porous, spongelike mass, saturated with acetone • MUST STORE UPRIGHT!! Maximum safe upper pressure limit: 15 psi DO NOT use copper piping for Acetylene gas delivery systems! Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 8 Safe Handling of Compressed Gases in Cylinders Handling Flammable Gas Correct Environment: Shall not be used near ignition sources-open flame, sources of heat, oxidizers, nonnon intrinsically safe electrical equipment Correct Equipment: Manifold systems and regulators designed by experienced i d personnel…flash l fl h arrestors, t check h k valves, PRV’s, spark-proof components, intrinsic safety features Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 9 Safe Handling of Compressed Gases in Cylinders Pyrophoric Gases A gas that will spontaneously ignite in air at or below 54.4C (130F) ( ) Silane Phosphine Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 10 Safe Handling of Compressed Gases in Cylinders Pyrophoric Gas Unique q gases, g , unique q applications pp ……… Unique Training Contained Delivery Systems • Praxair Distribution Inc., Quality Department . Gas Cabinets/Coaxial Pi i /A t Piping/Automated t d Controls and Emergency Shutdown Systems Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 11 Safe Handling of Compressed Gases in Cylinders Compressed Gas Cylinders NEVER trust a the color of a compressed gas cylinder. There is NO industry standard – varies by manufacturer. manufacturer NEVER assume cylinder contents – ALWAYS check the label! Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 12 Safe Handling of Compressed Gases in Cylinders Best Practices for Safety Good ventilation Check for leaks Keep all valves valves, fittings fittings, connections free of oil or grease, verify Teflon tape is approved for use with flammables. Open valves slowly, pointed away from the direction of people Never manipulate fittings – do not attempt to repair a cylinder valve yourself. Return for a replacement l t cylinder. li d Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A Safe Handling of Compressed Gases in Cylinders Incident Review Schweitzer Hall Explosion p at University of Missouri June 28, 2010 Lessons Learned: Equipment Process T i i Training Remedies Could this happen to you? EHS Safety Listserv - August 17, 2010 (access through http://ehs.unl.edu, ‘ListServ’ ListServ tab) Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 14 Safe Handling of Compressed Gases in Cylinders Toxic - Corrosive Gas Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 15 Safe Handling of Compressed Gases in Cylinders Toxic Gas Toxic • A substance that has the ability y to produce injurious or lethal effects through its interaction with the body • A toxic substance that has a median lethal concentration in air of <200 ppm Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 16 Safe Handling of Compressed Gases in Cylinders Corrosive Gas Corrosive • A substance that rapidly attacks and produces irreversible damage to human tissue, tissue such as eyes, eyes skin, skin mucous and other living tissue Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 17 Safe Handling of Compressed Gases in Cylinders Gases & Locations - UNL Manter, Othmer, Hamilton, Walter Scott Carbon Monoxide Ammonia Hydrogen Sulfide Hydrogen Chloride Praxair Distribution Inc., Quality Department . Chlorine Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 18 Safe Handling of Compressed Gases in Cylinders Multiple Hazards Some g gases represent p multiple p hazards • Flammable, Flammable toxic and corrosive: Hydrogen Sulfide • Flammable and toxic: Carbon Monoxide Ethylene Oxide Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 19 Safe Handling of Compressed Gases in Cylinders Safety Considerations Product Product-specific specific training for users. Product knowledge is KEY!!! • Special valves and caps • Material Compatibility MSDS access/review and appropriate door posting p g Quantity of toxic gases kept on site? Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 20 Safe Handling of Compressed Gases in Cylinders Remember AN EMPTY CYLINDER IS NEVER 100% EMPTY!!!! Handle,, Store,, and Transport p an ‘empty’ py cylinder as if it is a full cylinder Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A Safe Handling of Compressed Gases in Cylinders Best Practices for Safety Engineering Controls Forced ventilation areas for storage g and use points p Critical considerations for connections, leak test, shutd down procedures, d purging/inerting the system and regular system maintenance Regular training & maintenance Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A Safe Handling of Compressed Gases in Cylinders Best Practices for Safety Toxic Gas Monitors & Alarms Emergency Preparedness 9 Adequate eye wash 9 Respiratory p y equipment q p readily y available 9 Be aware of notification and evacuation procedures (Learned through webb based d Emergency E Preparedness P d training t i i & discussions with supervisor) Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A Safe Handling of Compressed Gases in Cylinders Incident Review Ames Laboratory – Hydrogen Sulfide Root cause: Leaking regulator, insufficient ventilation Argonne National Laboratory – Chl i Chlorine Root cause; Insufficient Training, g unqualified q personnel handling product and delivery system Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 24 Safe Handling of Compressed Gases in Cylinders Incident Praxair s Propylene Fire - June 2005 Praxair’s (security camera image) Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 25 Safe Handling of Compressed Gases in Cylinders Incident TWO minutes later ((security y camera image) g )– ALL employees & customers evacuated safely due to emergency procedures and drills! Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 26 Safe Handling of Compressed Gases in Cylinders Emergency Preparedness Review other incidents involving Compressed Gas Cylinders on the Chemical Safety Board web site: http://www csb gov/ http://www.csb.gov/ NOW….REVIEW YOUR LAB SPACE AS THOUGH AN ACCIDENT IS ABOUT TO HAPPEN PROCEDURES? TRAINING? EQUIPMENT? Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 27 Safe Handling of Compressed Gases in Cylinders Have a Plan What IS your department’s and laboratory’s plan? The Emergency Plan is KEY to assuring the safety of persons and property!! Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 28 Safe Handling of Compressed Gases in Cylinders Resources The Compressed Gas Association www.cganet.com Environmental Health & Safety Safe Operating Procedures http://ehs.unl.edu/sop/ Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 29 Safe Handling of Compressed Gases in Cylinders General Review If a regulator for an Oxygen cylinder is difficult to thread, you should: A: Oil the threads –NEVER B: Return the cylinder or the regulator to the supplier - ALWAYS C: Use a crecent wrench to tighten it NEVER D: Use a regulator from a nitrogen cylinder –NEVER, or regulator designed for ANY other gas besides Oxygen Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 30 Safe Handling of Compressed Gases in Cylinders General Review What type of cylinder should never be stored on its side? A: Acetylene (per this training) B: Helium C: Breathing Air D: Oxygen Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 31 Safe Handling of Compressed Gases in Cylinders General Review Cylinders containing flammable gases shall not be stored near: A Areas where A: here electrical sparks might be generated B: Bunsen burners C: Pilot Lights D: All of the above – ANY source of ignition Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 32 Safe Handling of Compressed Gases in Cylinders General Review It is acceptable to use plastic piping for parts of a flammable gas or high pressure gas delivery system: A: True B: False – plastic is a petroleum-based product and not designed to withstand th pressures involved the i l d Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 33 Safe Handling of Compressed Gases in Cylinders General Review It is safe to conduct minor repairs to valves and regulators of cylinder gases: A: True B: False - NEVER. Instead, return to manufacturer . Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 34 Safe Handling of Compressed Gases in Cylinders General Review It is acceptable to check if a cylinder is empty or full, by slowly opening the cylinder valve to listen for pressure and gas release: A True A: Tr e B: False - NEVER. This bad habit can result in injury or death. Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 35 Safe Handling of Compressed Gases in Cylinders Praxair Contacts Local Contact: Regional Contact: Jeff Plager Pam Hendershot Praxair Distribution Praxair Distribution 1210 Nance Street 1700 – 2nd Avenue Lincoln,, NE Des Moines, IA 402-477-8791 #800-283-8348 ext 224 Praxair Distribution Inc., Quality Department . Copyright © 2000, Praxair Technology, Inc. All rights reserved. . Rev. Date 04/24/2006-A 36
