Double wall fittings for use with double wall pipeline systems
Double-containment pipe fittings and system
Double-walled pipe construction
Dual concentric pipes
Dual conduit drill stem member
Dual conduit drill stem member and connection
Dual flow passage drill stem
Dual passage pipe for cycling water to an undersea mineral aggre
Elbow fittings with expanded outer annulus space for double-cont
Elongated cryogenic envelope
Enhanced-draining and/or stagnant-pocket-minimizing...
External cover pipe for fluid transport pipe
Fire sprinkler piping system fitting
Fittings for connection to double wall pipeline systems
Fittings for use with double wall pipeline systems having suppor
Fittings for use with fin strengthened double wall pipeline syst
Fixing construction for pipe joint
Force-transferring double-containment plastic pipe assembly
High pressure fitting
Interlocking union for double containment pipe