How to make ASTM A106/A53 seamless steel pipe?

　　The production process of ASTM A106/A53 seamless steel pipe is divided into the following steps: round tube blank → heating → perforation → three-roll cross rolling, continuous rolling or extrusion → tube removal → sizing (or diameter reduction) → cooling → straightening → hydraulic pressure Test (or flaw detection) → Mark → Warehouse. Seamless steel pipes are made from steel ingots or solid tube blanks that are perforated into capillary tubes, and then hot rolled, cold rolled or cold drawn.

　　The manufacturing process differs depending on the particular type and grade of ASTM A53 pipe that it is.  The steel for both seamless and welded pipe shall be made by one or more of the following processes: open-hearth, electric furnace, or basic oxygen. The weld seam of the electric-resistance welded pipe in Grade B shall be heat treated after welding.  Below are the different types available in ASTM A53 pipe.　　ASTM A53 Steel Pipe Types,The following types & grades of A53 pipe are covered within the ASTM A53 specification:

　　Type F – Furnace-butt-welded, continuous welded Grade A

　　Type E- Electric-resistance-welded, Grades A and B

　　Type S- Seamless, Grades A and B

　　The manufacturing process for ASTM A106 seamless pipe starts with killed steel, with the primary melting process being open-hearth, basic-oxygen, or electric-furnace, possibly combined with separate degassing or refining.  Steel cast in ingots or strand cast is permissible.  That bar is then rolled and pierced to produce a true seamless pipe. The hot-finished pipe does not need to be heat treated.  The cold-drawn pipe is heat treated after the final cold draw pass.

　　Seamless steel pipes are mainly divided into: hot-rolled seamless steel pipes, cold-drawn seamless steel pipes, and cold-rolled seamless steel pipes.

　　The production process of cold-rolled ASTM A106/A53 seamless steel pipe is similar to that of cold-drawn seamless steel pipe. The difference is that the cold-drawing process is changed to a cold-rolling process. Generally, there are two-roller cold rolling and three-roller cold rolling, and some individuals have five-roller cold rolling. Cold rolling, there are many types of cold rolling machines.