.~ Perforating, weakening, bending or separating pipe at an unprepared point {1}
298
.~.~ Perforating, weakening or separating by mechanical means or abrasive fluid
DEFINITION
Classification: 166/298
(under subclass 297) A process in which the wall portion of the pipe is perforated, weakened or separated by (1) a mechanical cutting, punching or abrading means or (2) a jet of fluid containing an abrasive.
(1) Note. A projectile propelled by an explosive jet of fluid such as that produced by a shaped charge is not included. Processes using such projectiles or jets are classifiable in subclass 297 or Class 175, Boring or Penetrating the Earth, subclasses 2+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
55+, for apparatus for perforating, weakening or separating a pipe wall.
SEE OR SEARCH CLASS
83, Cutting,
13+, for cutting methods in general, especially subclass 54 for a method of cutting the wall of a hollow workpiece, and subclass 177 for apparatus for cutting by fluid blast and/or suction. 175, Boring or Penetrating the Earth,
67, for boring by fluid erosion and subclass 422 for an earth boring nozzle.
