Understanding ANSI B11.0 - 2023: Avoiding Mistakes with In-Running Nip Points in Pharmaceutical Manufacturing

In pharmaceutical manufacturing, where precision and safety are paramount, understanding and correctly applying safety standards like ANSI B11.0 - 2023 can be the difference between a safe operation and a dangerous oversight. A common area of confusion and potential hazard is the in-running nip point, defined under section 3.41 of the standard.

What is an In-Running Nip Point?

An in-running nip point is any location between a rotating machine member and another rotating or fixed member, or even the material itself, where a part of the body could be drawn in and injured. This concept is crucial in pharmaceutical manufacturing, where machines often involve intricate moving parts.

Common Misunderstandings and Mistakes

One of the most frequent errors we encounter is the underestimation of where in-running nip points can occur. For instance, many overlook that these points are not limited to powered machinery but can also be present in non-powered rollers driven by product movement.

Another mistake is the assumption that only counter-rotating surfaces pose a risk. According to ANSI B11.0 - 2023, surfaces rotating in the same direction but with different peripheral speeds, surface properties, or even one surface rotating toward a fixed object, can create hazardous nip points.

Real-World Scenarios in Pharmaceutical Manufacturing

In my experience, I've seen how easily an in-running nip point can be missed. Take, for example, a tablet coating machine where rollers are used to guide the coated tablets. If not properly guarded, the space between these rollers and the machine's fixed parts can become a dangerous nip point.

Similarly, in the filling and capping lines, open drive belts or chains used to move bottles can create in-running nip points. It's critical to identify and mitigate these risks to prevent accidents.

Strategies for Mitigation

To avoid mistakes and enhance safety, consider the following strategies:

• Regular Training: Ensure all employees are trained on recognizing and understanding in-running nip points as per ANSI B11.0 - 2023.
• Risk Assessment: Conduct thorough risk assessments to identify all potential in-running nip points, even in non-obvious areas like non-powered rollers.
• Proper Guarding: Implement appropriate guarding solutions for all identified nip points. This might include physical barriers, safety interlocks, or even redesigning the machinery to eliminate the hazard.
• Maintenance Protocols: Establish rigorous maintenance protocols to ensure that guards and safety mechanisms are always in optimal condition.

By applying these strategies, pharmaceutical manufacturers can significantly reduce the risk of accidents associated with in-running nip points. Remember, the key is not just compliance with ANSI B11.0 - 2023, but a proactive approach to safety that goes beyond the minimum requirements.