EST

Metal pipe and tube pressure testing and plugging apparatus, namely, pipe and tube hydrostatic test plugs, heat exchanger and condenser tube plugs, and heat exchanger and condenser tube stabilizers plugs

Pipe and tube pressure testing and plugging apparatus, namely, portable hydrostatic test pumps for testing heat exchanger and condenser tubes, pneumatic and vacuum test guns for testing heat exchanger and condenser tubes, and hydraulic rams for installing plugs in heat exchanger and condenser tubes

Manually operated pipe and tube pressure testing, plugging, and repairing hand tools in the nature of manual plug installation and removal tools, namely, heat exchanger tube pluggers for manually installing and removing plugs without requiring electric or pneumatic supplies; manually operated pipe and tube pressure testing, plugging, and repairing hand tools in the nature of pipe tapping tools, namely, pipe tappers for tapping pipes under pressure; and manually operated plumbing tools for precluding fluid flow in pipes, namely, a pipe plugger that is installed on an end of a pipe and that has seal at one end thereof capable of being extended through a valve and expanded within the pipe downstream of the valve so that the valve can be repaired or replaced while the pipe remains under pressure