Pub. 6 2017-2018 Issue 1

26 San Diego Dealer HFO-1234yf REFRIGERANT ISAFLAMMABLE GAS Automobiles have been using refrigerant gases in their AC systems for decades. The refrigerant gases have generally been inert gases, such as Freon-12 and R-134. Recently, many auto manufacturers have started to use HFO-1234yf as the refrigerant gas in their AC systems. This gas is expensive, about $80/lb., and the recycling machine costs another $5000. The bigger issue is that it is a flammable gas. Flammable gases pose special hazards and dealers should take steps to address this concern. First, label the refrigerant gas tank as “Flammable Gas” (GHS labels). Secondly, train all employees who will use the machine and refrigerant gas on the Safety Data Sheet (SDS) of the refrigerant and emphasize its flammability. The SDS is available on our web portal and an example can also be found here, http://www.nationalref.com/pdf/19%20SDSR1234yf.pdf. Training should be documented and maintained. Lastly, consistent with OSHA regulations, dealerships should ensure that no spark or fire source is present within 20 feet of the refrigerant system when it is being used. FLAMMABLE LIQUID STORAGE LIMITS OSHA regulations impose open area storage limits for flammable liquids. Flammable liquids beyond the storage capacity must be stored in NFPA approved storage cabinets with specific hazard markings. Recently, many dealers have transitioned from regular disposable aerosol cans to refillable aerosol cans. A 55 gallon drum of brake cleaner is stored onsite to fill the aerosol cans. The savings include the cost of the can and the disposal expenses related to non-refillable aerosol cans. The refill option is greener and better for the pocketbook. Fire safety regulations and OSHA codes must be complied with regarding storage in shop area. Local Fire Departments may have storage limitations greater than OSHA regulations and must be consulted and complied with. The limit on flammable liquids storage is based on flammability characteristics as follows: FLAMMABLE LIQUID FIRE AREA STORAGE LIMITS Category Flashpoint Boiling Point Storage Limits Example 1 Below 73.4°F At or Below 95°F 25 Gallons Acetaldehyde, Ethyl Ether, … 2 Below 73.4°F Above 95°F 120 Gallons Acetone, Ethanol, Gasoline … 3 73.4°F – 140°F – 120 Gallons Kerosene… 4 Above 140°F – 120 Gallons Lube Oil… Note: Not more than 60 gallons of Category 1-3 flammable liquids, nor more than 120 gallons of Category 4 flammable liquids may be stored in a NFPA approved storage cabinet. Acetone is a common Brake Cleaner and the storage limits are 120 gallons or two 55 gallon drums in the shop area. The drums must be stored in a cool shaded area, as acetone and other flammable liquids expand in direct solar heat. Any bulging drums must be handled with caution by employees with special knowledge and training. Generally, non-metallic tools should be used to open the drum and the built-up pressure must be released in a careful manner. The drum must be grounded to a metal water pipe or an 8 foot steel rod into the ground. Bonding with the metal-can during dispensing is also mandatory in order to minimize the risk of spark from static electricity. Employees using flammable or other hazardous materials must be trained in handling and responding to emergency situations such as spill response and fire control. Ref.: Federal OSHA 1910.106(e)(2)(ii)(b) & Cal/OSHA Title 8 CCR 5533 & 5545 By Sam Celly DEALER ALERT