Hydraulic flange spreaders are tools that are used to separate flanged connections in piping and machinery. They work by using a hydraulic cylinder to generate a high amount of force, which is applied to a wedge-shaped piece of metal that is inserted between the flanges. The wedge is then pushed outward, causing the flanges to be separated.

To use a hydraulic flange spreader, the tool is first positioned between the flanges, with the wedge facing the flanges. The tool is then activated, and the hydraulic cylinder generates a large amount of force, which is transmitted through the wedge to the flanges. As the wedge is pushed outward, it exerts a separating force on the flanges, causing them to be separated.

Hydraulic flange spreaders are commonly used in a variety of industries, including oil and gas, power generation, and manufacturing, to allow maintenance or repairs to be performed on machinery and piping. They are useful because they can generate a large amount of force with relatively little effort, and they can be easily controlled to apply the right amount of force for the specific job.