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The spiral steel pipe extrusion process includes the following production proces

2017-10-26 09:24:16   COMMENT:0 HITS:
  The spiral steel pipe extrusion process includes the following production processes

  Blank: round billet after peeling, fixed length cutting, drilling, mechanical processing and cleaning, can be formed hollow tube billet ready for the blank.

  Billet heating: according to different grades of steel, it can be divided into three heating stages to ensure the appropriate temperature to meet the production process requirements.

  Preheating: a rotary hearth gas furnace will be used for the first step heating and preheat the billets to 700 ~ 900 degrees centigrade.

  Induction heating unit (the first stage): the first group of Manufacturer of API5l Psl Spiral Steel Pipe induction heating unit heats the billet to the required temperature of reaming process, which is about 1100 ~ 1250 degrees centigrade, and the specific temperature is determined according to the production steel grade. The induction heating unit adopts low frequency heating mode.

  Blank lubrication: glass fiber lubrication before reaming.

  The hole in the drilled hole before extrusion billet, must start from the pilot hole reaming a small hole, until finally reach diameter machining precision.

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