LOTO: Lockout Tagout for Industrial Machinery
How To Improve Safety at Your Facility
Most essential maintenance, repairs, and operations (MRO) tasks require lockout tagout (LOTO) safety procedures. Especially tasks that involve electrical power sources in combo with moving parts, blades, presses and other hazards. And remember once power is turned off, you need to also consider stored energy such as pneumatics, hydraulics, and capacitors. Lockout tagout can be a big part of improving safety at your facility but did you know that there are certain service activities where LOTO could potentially be engineered out?
LOTO Alternatives – OSHA Minor Servicing Exception
This post will spend time reviewing activities where LOTO could potentially be engineered out with an alternative measure. What qualifies an application? In short it must be: (1) routine, (2) repetitive, and (3) integral to production. These tasks typically include cleaning, setup, adjustments and jam clearing and are further outlined in OSHA’s minor servicing exception:
-1910.147 Subpart O
Read the full version here. This exception is a hot topic and a pretty big deal. While it does offer room for improving productivity, we must always keep in mind that the alternative measure must offer effective protection.
It’s Time to Rethink Lockout Tagout
So what exactly is effective protection? Alternatives to traditional lockout tagout safety procedures can help improve productivity and reduce incentives for maintenance personnel to bypass this process. If you are interested in learning more about these alternatives, please check out this article. It is written by George Schuster from Rockwell Automation, an industry expert. The article originally appeared in The Journal from Rockwell Automation.
When Can I Consider LOTO Alternatives?
Remember, for any LOTO procedure the proposed alternative must:
- Be conducted during normal production operations
- Be routine, repetitive, and integral
- Use alternative measures to provide effective protection from the hazardous energy
Reduced Downtime & Increased Productivity
How are these alternative measures going to reduce downtime? The George Schuster article looks at examples such as a press brake in a sheet metal processing plant, configurable safety relays, interlock switches, safe speed motors, and more. Let’s look at some more examples. Each of these 3 examples below will walk you through a scenario and offer a short quiz of just a few questions to help get a better understanding of safety.
-Example 1: Printing Press Roll Cleaning (2 questions) this scenario considers the rollers on a printing press. These rollers spin at a very high speed. The rollers must be cleaned periodically during the work shift to ensure product quality. Does the press have to be shut down for the cleaning operation? Yes? No?
-Example 2: Automotive Component Lubrication Robotics (5 questions) this scenario looks at the use of robots in fenced cages. The application is transferring parts via rotating tables from station to station. Electrically interlocked gates are used. How and when can employees can gain access to the robots by entering the cages? What are the exceptions?
-Example 3: Replacement of Nitrogen Pressure Vessel Seals (5 questions) this scenario considers the potential for unexpected release of hazardous energy during the task of replacing the head seals on twelve large accumulator bottles. When does this pose the risk of injury to the employees, and when does it not?
The examples above help you gain an understanding that, yes, there are times when you could offer a quicker and easier alternative measure. Plant managers, maintenance personnel, and engineers should be aware of the OSHA minor servicing exception, as it can sometimes offer productivity gains. But, you must always offer effective protection. Safety First!
Horizon Solutions goal is to help improve our customers’ efficiency, productivity and safety. A proven understanding of LOTO concepts and proper use of electrical controls allow our specialist team to do so. Our team of trained specialists can help you safely implement these concepts on your next project. Contact us today!
What types of LOTO challenges to do you face today? Have you had experience with the OSHA Minor Servicing Exception?