This class includes:
A. Tubular members of definite or indefinite length includingwall structure of the tubular members, the end structure of thetubular members of definite length, if not elsewhere classifiable.
B. Fluid pressure compensators (e.g., accumulators or cushioningdevices), flow regulators, or baffles not restricted by structureto use with any particular art.
C. Devices for thawing frozen fluid in pipes, for preventingthe fluid in the pipes from freezing and for preventing the pipefrom bursting if the fluid freezes.
D. Pipes with closures and plugs where tied with the structureof the pipe or limited by structure to use with a pipe.
E. Methods and apparatus for repairing pipes where not elsewhereclassifiable.