In the production process of stainless steel welded pipes, the emergence of welding defects will bring many serious problems. General technical regulations have strict regulations on welding defects, and it is clear that defects such as cracks, unwelded, unfusion and surface slag inclusion are absolutely not allowed to exist.

With its core advantages such as strong corrosion resistance, excellent toughness and good moldability, seamless stainless steel pipes are widely used in the medical devices, petroleum, chemicals, nuclear power and building decoration industries.

The welding process of stainless steel large-diameter thick-wall pipe is a very challenging and key technology in the field of industrial manufacturing. Welding methods such as plasma welding, argon arc welding, submerged arc welding, etc. are reasonably selected.

Stainless steel U-tube is a tubular component that bends straight tubes into a "U" shape. The "U"-shaped design reduces connection points and prevents gas or liquid leakage.

Square and rectangular steel pipes have become indispensable structural materials in the construction, machinery, automobiles, furniture and other industries due to their excellent mechanical properties and processing characteristics.

During the manufacturing, processing and use of stainless steel, the surface may be affected by oil stains, scratches, rust, impurities and other pollutants. The pollutants not only damage the surface quality of the stainless steel pipe, but may also damage its passivation film and reduce corrosion resistance. In order to maintain the corrosion resistance of stainless steel, pickling passivation has become an indispensable link.

The welding properties of metal materials are closely related to factors such as material composition, welding methods, and usage requirements. The welding processes of different metal materials need to select appropriate welding methods and process parameters based on the physical and chemical properties of the material (such as melting point, thermal conductivity, thermal expansion coefficient, metallurgical compatibility, etc.).

Stainless steel seamless pipes are widely used in many industrial fields, and heat treatment plays a key role in the cold processing (such as cold rolling and cold drawing) production of stainless steel seamless pipes, which directly affects processing efficiency, finished product quality and final performance.

Seamless pipe cold drawing machine is an important equipment for the production of high-precision, high-surface quality seamless steel pipes. Its working principle is based on the cold deformation processing of metal, and the steel pipes are applied to the tension force through the mold.

Welding is a common method of metal connection and is widely used in the manufacturing of stainless steel products. However, during the welding process of stainless steel, the problem of deformation often occurs.

The JCO forming process is a forming process for large-diameter straight seam submerged arc welded pipes developed by the German company SMS MEER in the 1990s.