Cold-rolled seamless pipes should be pickled in the production process

As we all know, the cold-rolled seamless pipe has a bright surface and is not easy to rust. This problem is not only related to the performance of the cold-rolled seamless pipe itself, but also to the production process of the cold-rolled seamless pipe. Cold-rolled seamless pipes should be pickled during the production process. First of all, not all steel pipes can be pickled unless potassium carbonate is contained in the steel pipe composition material, but this material is rarely contained in other steel pipes except cold-rolled seamless pipes. Then this potassium carbonate will become very bright during the pickling process. What is the specific reason? Let’s introduce it!

What is the pickling procedure for cold rolled seamless pipes?

  1. During the pickling process, it is extremely important to master the annealing temperature of the cold-rolled seamless tube. If the annealing temperature is too low, the cold-rolled seamless pipe will be too hard and difficult to be cold-rolled. If the annealing temperature is too high, it will cause peeling of the cold-rolled seamless pipe and unclean pickling. In the subsequent cold rolling process, the quality of the product will also be affected, and the cold-rolled seamless tube may also be broken during the cold drawing process; if the cracks in the raw materials cannot be completely worn, pits and warpage will also appear in the finished product; pickling is a The exclusive secret to the production of cold rolled seamless pipes.
  2. Familiar with the manufacturing process of steel pipe products: within 10 years of work, every process of product manufacturing has been done, including pickling, cutting, internal and external polishing, two-roll cold rolling, three-roll cold rolling, broaching, ash , welding, heading, annealing, flat head, internal and external polishing, packaging, inspection, etc. By operating each process, we understand that the product quality is guaranteed, and no process can be relaxed. The first is the control of raw materials. The chemical composition, wall thickness, internal and external cracks, eccentricity, etc. of raw materials must be carefully checked.