GB/T13793 - 2008 Q235A steel pipe production process

The fabrication process of GB/T13793 - 2008  Q235A welded and seamless steel pipe  is as follows:
For seamless steel pipe, its production process usually includes the following steps:
Preparation of raw materials: Q235A steel billet, which meets the standard requirements, is carefully selected as raw material.
Heating: The billet is heated in a heating furnace to reach a suitable processing temperature.
Perforation: The heated billet is perforated into a hollow tube with the help of a perforating machine.
Rolling: Rolling of the blanks with the help of a rolling mill in order to make the wall thickness and diameter reach the specified dimensions.
Sizing: Sizing of the rolled steel pipe by sizing machine to ensure that the dimensional accuracy meets the requirements.
Cooling: cooling treatment for steel pipe to improve its organisation and properties.
Straightening: Straighten the cooled steel pipe to make its straightness meet the specified requirements.
Cutting: cut the steel pipe into the specified length.

And the production process of welded steel pipe mainly includes the following links:
Raw material preparation: the same choice of Q235A steel as raw materials, and process it into the required plate or strip.
Forming: through the roll bending or stamping and other ways to form the plate or strip into a tube.
Welding: Adopt welding methods such as electric arc welding and resistance welding to weld the seams of the pipe billet to form a continuous weld seam.
Weld treatment: Grinding, flaw detection and other treatments are carried out on the welded seams to ensure reliable quality of the welded seams.
Size adjustment: adjust the size of the welded steel pipe to make it meet the requirements of GB/T13793 - 2008 standard.
Cutting: Cut the steel pipe into the specified length.
In the whole production process, it is necessary to strictly control the process parameters of each link to ensure that the quality of steel pipe meets the requirements of GB/T13793 - 2008 standard for Q235A welded and seamless steel pipe. At the same time, corresponding tests and inspections, such as chemical composition analysis, mechanical properties testing, dimensional measurement, non-destructive testing, etc., are also required to ensure the reliable performance and quality of the steel pipe.