Cutting device for seal welded instrument connections?

[LesT]

Some of our instrumentation is screwed in and then seal welded onto nozzle. For many years we have used a manual device that clamps around the joint and with a small cutter insert, the seal weld is manually cut way by turning the clamp. A TIG weld totch can also be attached to this device. It look very similar to a pipe cutter. We are trying to replace this device but the original manufacturer no longer exists. We have some difficulty finding a new one. I do not know what the device is called. Can somebody name this device or refer me to supplier. Thanks