Lined pipe and pipe joints and method of lining pipe and joining lined pipe

Claim 1

A LINED PIPE JOINT BETWEEN TWO SECTIONS OF METALLIC PIPE, COMPRISING THE END PORTIONS OF SAID PIPE SECTIONS BEING CYLINDRICAL AND OF SUBSTANTIALLY CONSTANT DIAMETER, A CORROSION-RESISTANT LINER IN EACH OF SAID PIPE SECTIONS AND HAVING AN OUTER DIAMETER SMALLER THAN THE INNER DIAMETER OF SAID PIPE SECTIONS WHEREBY SAID LINERS ARE EASILY INSERTED THROUGH SAID PIPE SECTIONS, EACH OF SAID LINERS IN SAID PIPE SECTIONS HAVING A FLANGE PORTION EXTENDING RADIALLY OUTWARD OVER THE ENDS OF SAID PIPE SECTIONS, A CORROSION-RESISTANT FERRULE HAVING AN OUTER DIAMETER SUBSTANTIALLY LARGER THAN THE INNER DIAMETER OF THE LINER INSERTED INTO THE END OF EACH OF SAID LINERS TO EXPAND THE LINER AGAINST THE INTERIOR OF SAID PIPE SECTION WHEREBY THE INTERIOR OF SAID FERRULE IS IN SUBSTANTIAL ALIGNMENT WITH THE REMAINDER OF THE INTERIOR OF SAID LINER, EACH OF SAID FERRULES HAVING A NOSE PORTION EXTENDING BEYOND THE FLANGE OF SAID LINER AND DEFINING A FRUSTOCONICAL GASKET SEALING SURFACE, A CYLINDRICAL COUPLING FOR SECURING THE ENDS OF SAID PIPE SECTIONS TOGETHER, AND A RESILIENT, CORROSION-RESISTANT GASKET POSITIONED IN SAID COUPLING FOR ENGAGEMENT BETWEEN SAID GASKET SEALING SURFACES, THE ENDS OF SAID PIPE SECTIONS BEING ADAPTED TO TIGHTEN INTO SAID COUPLING WHEREBY SAID GASKET IS COMPRESSED BETWEEN SAID GASKET SEALING SURFACES AND IS DEFORMED INTO SEALING ENGAGEMENT WITH THE INTERIOR OF SAID COUPLING AND TO FILL THE SPACE BETWEEN SAID FERRULES TO AN INNER DIAMETER SUBSTANTIALLY THE SAME AS THE INNER DIAMETER OF SAID FERRULES.