TDW

FLANGES, PIPE NIPPLES, PLUGS FOR USE ON PIPELINES AND OTHER FLOW CONDUITS; PLUGS FOR PLUGGING THE ENDS OF PIPELINES AND OTHER FLOW CONDUITS; PIPELINE PIGS AND CUPS THEREFOR; SPLIT TEES FOR ATTACHING TO PIPELINES OR OTHER FLOW CONDUITS AND PLUGS FOR SUCH SPLIT TEES; BUSHINGS FOR PROVIDING AN ELECTRICALLY NONCONDUCTIVE SEAL BETWEEN ONE PIPE PASSING THROUGH ANOTHER PIPE; INSULATORS FOR SUPPORTING ONE PIPE INSIDE ANOTHER AND ELECTRICALLY INSULATING SUCH PIPES FROM ONE ANOTHER; VALVES; PLASTIC PIPE FITTINGS AND DEVICES FOR INDICATING THE PASSAGE OF A PIG THROUGH A PIPELINE

MACHINES FOR PREVENTING FLOW THROUGH A CONDUIT BY INSERTING A PLUGGING ELEMENT THROUGH A LATERAL OPENING IN THE CONDUIT; MACHINES FOR TAPPING OPENINGS IN PIPELINES AND OTHER FLOW CONDUITS AND CUTTERS FOR SUCH MACHINES