Apparatus for instantaneously terminating movement of flow...

Apparatus for internally checking well pipe bore and for automat

Apparatus for mounting a pipe in an opening in a pressure vessel

Apparatus for plugging a pressure piping system

Apparatus for sealing pipe

Apparatus for securing written information to tubular goods

Apparatus for stopping the flow of natural gas

Apparatus for the abandonment of a branch main

Apparatus for the protection of tubes particularly tubes for dri

Apparatus for transferring line travel device from one pipeline

Arch end cap

Arrangement for closing off fluid passages

Assembly for sealing and pressure equalization of a submersible

Assembly for sealing and pressure equalization of a submersible

Assembly of a closing baffle inside a tubular member

Assembly of mouthpiece, stopper and lock for shutting off a pipe

Auxiliary device for repairing a pipeline

Ballast exhaust pipe closing appliance for a ship

Bayonet-type closure for line stopper fittings

Below surface ducting