Assembling method for jacketed pipe and its pipe lining apparatus
An assembly method and a technology for a pipe-piercing device, which are applied in the directions of pipes/pipe joints/fittings, pipe laying and maintenance, mechanical equipment, etc., can solve the problems of inconvenient use, large one-time investment, and complicated construction steps, etc. Efficiency, short time-consuming, guaranteeing the effect of installation quality and performance
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[0029] Such as Figure 1 to Figure 5 As shown, the pipelined high-pressure dissolution project of an alumina project (capacity 400kt / a) uses a three-pipe high-pressure stripper, which is a type of jacketed pipe, that is, a large outer pipe 5 Three small inner pipes 6 (see Figure 4 ), the size of the three inner tubes 6 is the same (it may be different in practice), the size of the outer tube 5 is Φ426×10 (that is, the outer diameter is 426mm, the wall thickness is 10mm, the same below), and the size of the inner tube 6 is Φ133×10. The length of the three casings is 120m. The three sleeves are assembled as follows:
[0030] 1. Treatment of pipe bevel
[0031] The processing of the groove is to use a pipe cutting machine to process the ends of the steel pipes (including the inner pipe and the outer pipe) of the three casings into a single-sided V-shaped groove with an angle of 30°±2.5°, and at the same time cut the surface of the groove Remove the oxide skin and slag, and u...
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