Machine Safety Shorts | Alternative Lockout Tagout Methods

First, let's clarify what lockout/tagout, often abbreviated as LOTO, means. LOTO is a safety procedure used to ensure that dangerous machines and equipment are properly shut off and not restarted while maintenance or servicing work is being performed. It involves disconnecting the machinery from its energy source and using a physical lock and tag to prevent accidental re-energization.

But what if there are situations where traditional lockout/tagout isn't practical or might even pose additional risks? This is where alternative methods come into play.

Alternative lockout/tagout methods are, as the name suggests, alternative approaches to achieve the same level of safety as traditional LOTO procedures. These methods are outlined in standards like ANSI Z244.1 and ISO 14118.

ANSI Z244.1 is a standard published by the American National Standards Institute that provides guidelines for the control of hazardous energy during servicing and maintenance of machines and equipment. It recognizes that in some cases, traditional LOTO might not be the best option, and it allows for alternative methods to be used, provided they meet specific safety criteria.

ISO 14118, on the other hand, is an international standard that deals specifically with machinery safety and the prevention of unexpected start-up. It also acknowledges the need for alternative methods when traditional LOTO isn't feasible or safe.

So, why are these alternative methods important? Well, there are several scenarios where traditional lockout/tagout might not be the best choice. For example, in industries with continuous processes where shutting down equipment is costly or impractical, alternative methods can help maintain safety without disrupting operations.

One of the most common alternative methods is known as "interlocking." This involves using technology to ensure that a machine cannot be powered up while maintenance is in progress. Interlocking systems can include sensors, electronic locks, or even software controls that prevent energy from being restored until it's safe to do so.

Another alternative method is "barricading" or creating a physical barrier around the machinery to prevent access during maintenance. This can be particularly useful in situations where other methods are not feasible or would create excessive downtime.

The key here is that these alternative methods must meet stringent safety criteria outlined in standards like ANSI Z244.1 and ISO 14118. They should provide an equivalent or higher level of protection compared to traditional lockout/tagout.

It's important to note that choosing alternative methods should never compromise safety. Risk assessments are critical in determining which approach is the most appropriate for a given situation.

In conclusion, alternative lockout/tagout methods, as outlined in standards like ANSI Z244.1 and ISO 14118, are essential tools for ensuring workplace safety, especially in situations where traditional LOTO procedures might not be practical. These methods provide flexibility while maintaining the highest levels of protection for workers.