EN ISO 11611 is the standard your protective clothing needs to meet for welding and allied processes. This norm is broken down in different classes. When testing the heat transfer, for example, the time a 24 °C temperature increase takes, determines the class: up till 7 seconds for Class 1, and 16 seconds for Class 2.
Knowing which class is needed for specific welding activities is important. For example, gas welding is a Class 1 activity, while MMA welding is a Class 2 activity. In this blog we’ll explain the differences between the classes, in order to help you to determine the right class for your welding activities.