Stainless steel pipes are widely used in building structures, infrastructure construction, automobile manufacturing, natural gas and oil industries due to their corrosion resistance and high strength. In particular, the demand for stainless steel pipes occupies a large market share in the marine engineering, petroleum and petrochemical, bearings, nuclear power, shipbuilding and other industries.The production process of stainless steel schedule tube is a complex and delicate process involving multiple steps and technologies. The following is a detailed introduction.

1. Raw material preparation

The first step in producing stainless steel pipes is raw material preparation. This process usually uses stainless steel raw materials, whose main components include chromium, nickel and steel. The raw materials must undergo strict screening and chemical composition testing to ensure that the quality meets the standards.

2. Smelting and melting

After the raw materials are prepared, the production process of stainless steel pipes continues with the smelting and melting steps. Smelting and melting usually use equipment such as electric arc furnaces or induction furnaces to heat the raw materials to a high temperature and melt them into liquid.

3. Continuous casting

The molten stainless steel liquid is injected into the continuous casting machine through the continuous casting process. The continuous casting machine puts the liquid stainless steel into the mold, gradually cools and solidifies it, and forms a continuous billet.

4. Forming

Forming is also called welding. All stainless steel pipe production and forming processes are inseparable from this process. Heating and welding are key steps in the forming process. Heating methods include medium frequency or high frequency induction heating, flame heating, reverberatory furnace heating, etc. Welding varies depending on whether welded pipes or seamless pipes are used.

5. Heat treatment

Heat treatment is the process of removing work hardening, residual stress and defects, and restoring metal structure and properties. This step is crucial to ensure the performance of stainless steel pipes.

6. Surface treatment

Surface treatment includes sandblasting, shot blasting, grinding and pickling to improve surface smoothness. After pickling, the residual acid can be washed away with water. In recent years, stainless steel processing companies have begun to use some pickling agents that do not damage the stainless steel surface and appropriately add pickling corrosion inhibitors.

7. Cutting Processing

Cutting processing is used to process welding ends, structural dimensions and geometric tolerances to ensure the accuracy and quality of stainless steel pipe fittings.

8. Nondestructive testing

Nondestructive testing is used to detect possible defects and ensure the safety and reliability of stainless steel pipe fittings.

9. Surface protection

Surface protection is usually done by pickling and then passivation to prevent corrosion and improve the appearance, thereby improving the corrosion resistance of stainless steel pipes.

10. Marking

The marking includes the manufacturer's trademark, name, material grade, etc., providing traceability and identification for stainless steel pipe fittings.

    The above steps constitute the complete production process of stainless steel pipes, and each step has an important impact on the quality of the final product. With the advancement of technology, the production of stainless steel pipes is also constantly optimized and innovated to meet higher performance requirements and a wider range of applications.