The invention provides a
copper-
nickel-iron pipeline connection
pipe fitting and preparation thereof. The
copper-
nickel-iron pipeline connection
pipe fitting comprises an outwards protruded surface joint, an inwards
concave surface joint and a locking nut. The
copper-
nickel-iron pipeline connection
pipe fitting is characterized in that the meshed positions of the outwards protruded surface joint and the inwards
concave surface joint are provided with meshed arc surfaces. The preparation includes shove charging,
smelting, sampling, analyzing, deoxidizing, refining,
casting,
forging and pressing, and finish
machining. Compared with the prior art, a rubber pad is removed, cost is relatively saved, and the copper-nickel-iron pipeline connection
pipe fitting is completely adapted to pipeline connection on the condition of
high pressure or high temperature. Meanwhile, as the
forging and pressing process is utilized, mechanical performance is improved, non-
cutting or little
cutting is achieved,
alloy material is saved, and production cost is reduced. The copper-nickel-iron pipeline connection
pipe fitting has the advantages of being convenient to connect, firm to connect, and high in seal degree, and pipeline connection is safe.