(under subclass 363) Apparatus in which the fluent material system is a pipe line.
(1) Note. Pipe systems having means or arrangements to compensate for thermal expansion are found here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1+, for processes relating to pipe line flow.
236, for distribution systems including pipe lines where special accommodation to geos:graphical features is involved.
317+, for pipe line repair involving tapping a line under pressure. SEE OR SEARCH CLASS
138, Pipes and Tubular Conduits,
105, for pipes in a trench; subclass 108 for underground conduits for supporting cables therein; subclass 113 for underground conduits for supporting pipes therein; and subclasses 124+, 131, 137+, and 140+ for composite pipes and conduits.
