The production process of stainless steel pipes involves several key steps, as outlined below.

1.Raw Material Preparation

Material Selection: Stainless steel billets or bars are selected as raw materials.Inspection and Cutting: The billets are inspected for defects and then cut into appropriate lengths

2. Heating

The bilets are heated in a furnace to a temperature that makes them malleable. The heating temperature variesdepending on the grade of stainless steel being used.

3.Extrusion or Piercing

Extrusion: The heated bilets are extruded through a die to form a hollow shel. This process is usually carried outusing a hydraulic press or an extrusion machine

. Alternatively, a mandrel can be inserted into the heated material to pierce the interior and create the inner diameter ofthe pipe.

4. Rolling

The pierced or extruded shell is then passed through a series of rolling mills. This reduces its thickness andincreases its length, giving it the desired shape and size.

5.Annealing

After roling, the pipe is annealed to soften it and remove any internal stresses. Annealing is carried out by heatingthe pipe to a specific temperature and then cooling it slowly.

6.Pickling and Passivation (Optional)

,In some production processes, the pipe may be pickled in an acid solution to remove any surface impuritiesAfter pickling, it is passivated to create a protective oxide layer on the surface. However, modern productionprocesses may avoid acid pickling through advanced manufacturing techniques.

7. Cold Working

The pipe may undergo additional cold working processes, such as drawing or swaging, to achieve the desireddimensions and properties.

8.Final Inspection

The finished pipe is inspected for defects, dimensions, and surface quality before being packaged and shipped. Thisensures that the product meets the required standards and specifications.

9.Additional Finishing (Optional)

Depending on the application and customer requirements, the stainless steel pipe may undergo additional finishing

processes such as polishing, cutting, or welding.In summary, the production process of stainless steel pipes involves a series of precise and controlled steps to ensurethe quality and performance of the final product. Each step plays a crucial role in shaping the pipe and preparing it for itsintended use.