What is used to open flanges for the installation of a test blind?

The installation of a test blind requires the separation of two flanges to create an opening in the piping system, allowing the test blind to be inserted. A flange spreader is specifically designed for this task. It works by applying a controlled force to the flanges, gently pushing them apart without causing damage to the flange surfaces or the bolts. This tool ensures that the flanges are adequately separated to allow for the safe and effective installation of the test blind.

Using a pipe wrench, while it can grip and turn flanges, is not suitable for spreading them apart as it could lead to uneven force application, risking damage. A C-clamp is not designed for spreading but rather for clamping, and a pry bar, though useful for leverage, lacks the precision and appropriate force control needed for flange separation. Thus, the flange spreader is the correct tool for the job, ensuring both safe handling and effective installation.