TANKER PIPING REMOVAL/INSTALLATION
Typical Pipe Coupling and Coupling Gasket Removal.
It will never be necessary to remove all the piping at one time.
All piping sections on the M978 tanker are joined with pipe couplings. Five sizes or standard
couplings and two sizes of reducing coupling are used: 1-1/4-inch, 2-inch, 3-inch, 4-inch, and 4-1/2-
inch standard couplings, and 4 X 3-inch, 3 X 2-inch reducing couplings.
Read paragraph "b." before removing piping, valves, adapters, and couplings.
Remove two nuts (1), screws (2),and coupling halves (3) from coupling gasket (4).
Push coupling gasket (4) onto pipe (5) and remove pipe (6).
Remove coupling gasket (4) from pipe.