One of the most common and dangerous hazards that occur within a manufacturing and production facility is the noise level within the plant. Noise is measured in units known as decibels. Decibels are a ratio of the power level of the sound compared to a logarithmic scale. If an employee is an exposed for too long to high levels of noise, they can begin to lose their hearing. That is where the OSHA 29 CFR 1910.95 regulation comes into play.
This OSHA standard doesn’t just provide the protection against noise in the work place but monitoring as well. Companies shall provide at no cost audiometric tests for all employees to ensure that no damage is being to the hearing of all personnel. This program is to be repeated every six months and the results are to be made accessible to all personnel.
Hearing is very important to our everyday lives and must be protected due to the fact that once it is damaged hearing loss cannot be lost be repaired. The OHSA 29 CFR 1910.95 is there to protect and monitor this dangerous hazard in the workplace so that all employees can go home safe and sound.
Here at EXAIR we design all of our products to safe and quite. Weather it is using one of our mufflers for vortex tubes or E-vac’s or one of our Super air nozzles we strive to meet and exceed the OSHA standard. One could also purchase EXAIR’s Digital Sound Level Meter which can give a accurate and responsive reading of how loud your compressed air sources are.
For more information on EXAIR’s Digital Sound Level Meter and any of EXAIR‘s Intelligent Compressed Air® Product lines, feel free to contact EXAIR and myself or any of our Application Engineers can help you determine the best solution.
I live near an amusement park called Kings Island. In the later part of Spring I can hear and see the people and rides. As the Summer enters and the tree leaves have all grown they act like a muffler reducing the roller coaster noises and screaming people on the roller coasters. These trees are not high enough to block the nightly fireworks but this is a good thing for me as I enjoy the sights and sounds of the fireworks.
An important focus in every manufacturing environment is a “Noise Reduction” campaign making a safer and healthier area for people working in the environment. EXAIR has Silencing Mufflers that can support your efforts for noise reduction. We have a variety of mufflers which will help to reduce work area noise produced by air exhausting from cylinders, valves and other air powered equipment. EXAIR Silencing Mufflers help plants meet OSHA Standard 1910.95(a) by reducing the sound to safer levels. Not only do our Silencing Mufflers reduce sound but they also eliminate harmful dead end pressures by covering up an open port or opening. These openings do not have a pathway for harmful pressurized air to escape if they become blocked.
Sintered Bronze Mufflers: A low cost solution and easy to install in new and existing air powered products. Sintered bronze muffler come in a variety of sizes (10-32 thread size up through 1/2-20 UNF female) and are capable of passing a certain volume of air with minimal back pressure restriction.
Reclassifying Mufflers: These mufflers are an upgrade from Sintered Bronze Mufflers. They offer the best noise reduction, up to 35 decibels. Available from 1/8 NPT up to 1 NPT. Reclassifying Muffles also eliminate oil mist. The patented wrap design of the removable element separates oil from the exhausted air so virtually no oil is released into the environment.
Straight-Through Mufflers: These mufflers offer a corrosion resistant aluminum outer shell lined with sound absorbing foam for better noise reduction. The typical noise reduction is up to 20dB.
Heavy Duty Mufflers: feature a corrosion-resistant aluminum outer shell with an internal stainless steel screen that protects valves and cylinders from contamination that could enter through the exhaust ports. The typical noise reduction is up to 14 dB.
EXAIR can help in your noise reduction projects with many options to consider. If you have any questions or need help selecting the right muffler for your needs please contact any of our qualified Application Engineers.
In 2012, the National Association of Manufacturers organized an effort to proclaim the first Friday in October (hey, that’s today!) as Manufacturing Day. According to the Advanced Manufacturing National Program Office (a division of NIST, the National Institute of Standards & Testing,) the purpose of MFG Day is “to raise awareness among students, parents, educators and the general public about modern manufacturing and the rewarding careers available.”
Today is kind of a big deal around here. Not only is EXAIR Corporation a manufacturer, but many of the companies that use our products are as well. A lot of us have a rich story, woven into the cloth of the history of American manufacturing (which, in turn, is woven into the larger cloth of American history.) Have you heard the one about the motivated inventor with an idea to make innovative products who started an operation out of his home that, with inspired direction & vision, became a worldwide leader in their industry?
Yeah; that’s us. Today, we’re honoring Roy Sweeney’s legacy (he founded the company in October 1983,) and celebrating MFG Day, by publishing a new Case Study, proving out the benefits of the use of EXAIR Intelligent Compressed Air Products in regard to the monetary savings associated with the reduction in compressed air use, and the noise level reduction from the implementation of our engineered products.
A roll forming operation used to blow off their product with a combination of loud and inefficient devices: copper tubing and modular flexible hose which is designed primarily for machine tool coolant, but often misapplied for use with compressed air.
It worked just fine, but an engineering study noted it as a potential wasteful use of compressed air. That’s when they called us.
Compressed air consumption dropped by more than half, from 190 SCFM to 86.8 SCFM…an annual savings of over $3,200.00. All for an investment of $654.00 (2020 pricing) for those engineered Air Nozzles, Stay Set Hoses, and Magnetic Bases. That means they’ll have paid for themselves in just under two months.
In addition to that, for participation in this Case Study, we’re giving them a generous credit on their order. Happy Manufacturing Day!
Last but certainly not least, this reduction in compressed air usage decreases the load on their air compressors, reducing the electrical power consumed. Product impact, along with our own consumption of resources and waste recycling, is a key component of EXAIR Corporation’s Sustainability Plan. We’re making the world a better place, by making products that make the world a better place, using methods that make the world a better place. I can’t think of a better way to celebrate Manufacturing Day. If you want to get in on it, give me a call.
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Strings of numbers and characters can often appear daunting. For instance, if I wrote in binary code it would be a string of ones and zeros. (01000101 01101110 01100111 01101001 01101110 01100101 01100101 01110010 01101001 01101110 01100111 00100000 01101001 01110011 00100000 01000001 01010111 01000101 01010011 01001111 01001101 01000101.) That can look like gibberish and cause concern if unknown or it can make sense to programmers and people familiar with binary code.
Other alphanumeric strings may cause some concern for industry professionals. Take, for instance, OSHA standards. The OSHA standard 29 CFR 1910.95 (a) may be unfamiliar to some, and thus concerning. Many Environmental Health and Safety Engineers will recognize this code. It is an OSHA standard that revolves around the amount of time an employee is permitted to be exposed to specific sound levels. These sound levels are all based on the weighted sound level of the noise the operators are exposed to. To better understand how the octave and frequency of the sound play into this, there is a chart provided below.
The weighted sound level is the level at which a Digital Sound Level Meter will read the current level of noise within an environment. This scale is then used to move further into the OSHA directive that we focus on helping companies meet to best provide safe environments for their employees to work in.
If you notice, the lowest weighted sound level is 90 dBA, this is also the lowest-rated noise level that OSHA speaks of in 1910.95(b)(2). It has been shown that noise levels over this level for extended periods will result in permanent hearing loss. The standard then goes on to discuss the duration an employee can be exposed to noise levels even with the use of personal protective equipment as well as even impulsive or impact noise. The table of permissible time limits is shown below.
As you can see from the table above provided by OSHA, any noise level that an operator is exposed to for eight hours cannot exceed 90 dBA. Noises within an industrial environment can also be variable throughout the day. For instance, the operator stands outside of a sheet metal press and the concussive strike on the press gives off a 90 dBA strike for every stroke of the press. This would not be a continuous noise level. Maybe the operator is operating a CNC machine that is cutting a nest of parts and uses a handheld blowgun to remove debris and coolant from the parts before taking them from their fixture. This blowgun is not used continuously and therefore would not be rated as such for the exposure time. A time study would be conducted on the average length of time the operator is utilizing this gun along with the level of noise it produces during use. OSHA then gives a calculation to use to appropriately combine the sound level while the gun is being used and when it is not in use. That equation is written out below.
C1 = Duration of time for a specified noise level
T1 = Total time of exposure permitted at that level
Cn = Total time of exposure at a specified noise level
Tn = Total exposure time permitted at that level
Should the summation of the fractions for different exposures be greater than the Total Exposure fraction, the summation value should be used. As mentioned above, a time study on exposure to noise levels will be needed to obtain the information needed for this type of study. Once the study is done the process can proceed to the next level within the OSHA standard which is a hearing conservation program.
I would like to interject a small side-step at this point. Rather than rolling straight into the implementation of PPE which is proven to be the lowest reliable factor of protection by the CDC and NIOSH. If any of these noise levels being generated are due to the use of compressed air points of use, EXAIR can potentially lower the noise of these point of use applications. In the events, open blowoffs or “band-aid” fixes are in place to keep processes running, and Engineered Solutions can easily be implemented that will reduce the noise level produced by this operation. Whether it is on the handheld Safety Air Gun in the hands of a CNC operator, or if it is a part/scrap ejector that is blowing the sheet metal press out after every strike, we have products that have proven time over time using an Engineered Solution will save air, reduce noise levels, and still get the job done.
If you would like to discuss OSHA directives revolving around compressed air, share with us a recent citation you received from an inspector for this standard, or just discuss compressed air usage in general, contact us.