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The purpose of the thick wall seamless pipes and the manufacturing process

2016-06-06 17:52:36   COMMENT:0 HITS:
  Use thick wall seamless pipes is: put the steel pipe diameter and wall thickness is less than 20 steel tube called a thick wall steel pipe. Geological drill pipe is mainly used for oil, oil chemical industry with the cracking of pipe, boiler tube, bearing and automobile, tractor, aviation with high precision tube structure, etc.

  Know the purpose of the thick wall seamless pipes after take a look at how thick wall seamless pipes is made?

  seamless pipes manufacturing technology 1. Hot rolled (extrusion seamless pipes) : the circular tube billet - heat - punch - three-roll skew rolling, rolling, or pressing - to take off the tube and sizing (or reducing) - cooling - straightening to hydrostatic test or inspection - > tag, put in storage

  Rolling seamless pipe raw material is round billet, round tube embryo through cutting machine cutting the growth degree of about 1 meter of the billet, and by the conveyor belt to heating furnace. Billet are fed into the furnace heating, the temperature is about 1200 degrees Celsius. Fuel for hydrogen or acetylene. In furnace temperature control is a critical problem. Circular tube billet after going through pressure punch wear empty. General is one of the more common punch is tapered roller puncher, this kind of punch high production efficiency, product quality good, large amount of perforated hole enlargement, can wear a variety of steel grade.

  After perforation, circular tube billet has been three-roll skew rolling, rolling or extrusion. To take off after extruding tube sizing. Sizing mill by taper drill bits high-speed steel into embryo punching and forming steel pipe. Steel pipe diameter by sizing mill bit length to determine the diameter. Steel pipe after sizing, into the cooling tower, by water spray cooling, steel pipe after cooling, will be straightening.

  Steel pipe by the conveyor belt to the metal detection after straightening machine (or water pressure experiment) for internal inspection. If the steel pipe internal crack, air bubble, will be detected. Steel pipe quality through rigorous after manual pick. Sprayed with paint after steel pipe quality, number, specification, batch number, etc. And by crane into the warehouse.

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