[Originally published by Industrial Safety News)
The majority of chemical spill problems occur while getting the chemicals out of the drums. Many small- to moderate-sized companies rely on workers to manually lift and tip the containers and pour the chemical into a smaller drum. Spills are inevitable, and spill kits and related equipment are necessary.
While there’s no substitute for planned maintenance programs one thing is for sure: tipping and pouring chemicals result in spills. Management then has OSHA and EPA safety issues.
Plant management is never happy with the loss of costly, usable chemicals, particularly when a low-cost, preventive approach exists.
Handling Drums of Acetone at Carolina Castings
Located in High Point, NC, Carolina Casting, Inc. is a leader in polyester resin-based products for the furniture industry. For its customers, they create bunn feet, finials, moldings and roto-casted table bases. They also make to chair backs, ornate fixtures, tabletops, mirror frames, highly complex assembled table bases and pedestals, and more. The process Carolina Castings uses will supply texture and color for the striking results their customers require.
“This solution has proved ideal for dispensing on demand”
The Problem: A large volume has to be dispensed daily from the 55 gallon acetone drum. Large, faucet-equipped drums of the chemical were stored upright in the chemical storage room. But for use, the 350 lb drums had to be moved to another location, placed on a cradle in a prone position, have bonding and grounding wires attached, and be tipped on its side to permit dispensing through hand control of the faucet.
After dispensing, the bonding and grounding wires were disconnected and the container returned to the storage area and again placed in an upright position. According to plant engineer Dan Stiles, the process was slow, labor intensive, and subject to potential spills when transferring the flammable solvent.
“We use acetone as a solvent to clean hand tools, small containers, and machine flushing operations,” noted Stiles. “However, our primary use is to clean our finished product so that it is free of chemical component, flashing, and foreign debris. The finished product is then ready for painting or staining with a similar texture final finish just as if it were its wood counterpart.”
The Search: Dissatisfied, Stiles reviewed several types of pumps for the flammable liquid. He finally decided to use a rotary hand crank pump on the container. The workers didn’t like the rotary pump because the liquid would pulse at the spout and splash on the employees during dispensing. Additionally, these pumps were unreliable after a few months, requiring costly repairs. Stiles then investigated air-driven pumps, but this was unsuitable because of high initial costs, expensive replacement parts, and high maintenance costs.
The Solution: “We decided to try a different type of pump and found a pressure action system from GoatThroat Pumps,” said Stiles. “These polypropylene units proved reliable, and permitted us to keep our drums safely in an upright position. We now have 2 rigs. At the fixed location, we use fixed grounding and bonding wires that are hooked directly to the drum. We have added the air compressor adapter which, with only 2 psi, delivers the acetone to small containers for our labor force to use at their benches for ‘small work’.
The solution has proved ideal for dispensing on demand. The same setup can also be used for larger mobile units, which fill 20-40 gal day tanks.
“At a rate of 4 gallons a minute, it takes one man about 12 minutes to fill the 40 gal tank,” said Stiles. “No more carrying buckets of flammable liquids across the factory. This took the better part of 30 minutes and could hurt the employee’s back. We have replaced o-rings a couple of times, but the original pumps are still in use after 4 years. The new procedure is faster and safer, and has helped us exceed our environmental compliance requirements. Safety is now the name of the game here.”
For more information, call 866‐639‐4628 (toll free)
Or visit www.GoatThroat.com