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Large Diameter Austenitic Stainless Steel Seamless Pipe Tube Manufacturers

Austenitic stainless steel, refers to stainless steel with the austenitic organization at room temperature. When the steel contains about 18% Cr, 8% to 25% Ni and about 0.1% C, it has a stable austenitic organization. Austenitic chromium-nickel stainless steel includes the famous 18Cr-8Ni steel and the high Cr-Ni series steel developed by increasing Cr and Ni content and adding Mo, Cu, Si, Nb, Ti and other elements on this basis.

Austenitic stainless steel seamless pipe is a long steel with a hollow cross-section and no seams around it. It is a steel pipe resistant to corrosion by weak corrosive media such as air, steam, water and chemically leaching media such as acid, alkali and salt. Also known as stainless acid-resistant steel pipe.

The common materials are TP304/304L, TP316/316L, TP321, TP347H etc. The process is mainly cold-rolled or cold-drawn seamless pipes, and the common international standards are ASTM A312, ASTM A213, ASTM A269, EN10216-5, etc.

Austenitic stainless steel seamless pipe has strong anti-rust, corrosion resistance, high-temperature resistance, excellent plasticity and toughness, convenient for stamping and forming, so it is widely used in oil, gas, chemical, electric power, aerospace, shipbuilding and other industries.

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SHANGHAI TOKO TECHNOLOGY CO.,LTD.

Shanghai Toko Technology Co.,ltd is famous Stainless Steel Big Diameter Seamless Pipes Manufacturers and Stainless Steel Big Diameter Seamless Tubes Suppliers. We are committed to manufacturing and exporting stainless steel seamless pipe, stainless steel welded pipes, stainless steel fittings and flanges, nickel alloy products, Titanium seamless and welded tubes, etc. Our factories are all ISO&PED certificated, and the products can be produced in standard ASTM, JIS, DIN, EN, GOST, etc. Our products are widely used in the Oil and Gas, Petrochemical, Sugar Refining, Water Process, Desalination, Geothermal industry etc. We exported to dozens of countries and regions such as USA, Canada, Japan, Germany, France, Korea, Turkey ect.

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How to ensure the dimensional accuracy and surface finish of steel pipes during the cold drawing process in the production of austenitic stainless steel large-diameter seamless pipes? What is the selection and replacement cycle of molds?

In the production process of austenitic stainless steel large-diameter seamless pipes, the cold drawing process, as one of the key steps, plays a vital role in ensuring the dimensional accuracy and surface finish of steel pipes. This process not only tests the sophistication of production technology, but is also directly related to the final quality and application performance of the product. Combined with our company's strict quality management system under ISO and PED certification, as well as our extensive experience in serving the oil, gas, chemical and other industries, the following will explore in depth the technical details of how we ensure dimensional accuracy and surface finish during the cold drawing process of austenitic stainless steel large-diameter seamless pipes, and explain the management strategy of mold selection and replacement cycle.
Measures to ensure dimensional accuracy and surface finish of cold drawing process
1. Accurately control cold drawing parameters
During the cold drawing process, temperature, tension, speed and diameter reduction rate are the key factors that determine the dimensional accuracy and surface quality of steel pipes. We use advanced automatic control systems to monitor and adjust these parameters in real time to ensure that each section of steel pipe can reach the optimal state during cold drawing. Through precise calculation and simulation, we set a reasonable reduction rate to avoid dimensional deviation or internal cracks caused by excessive stretching, while ensuring the uniformity of the wall thickness of the steel pipe.
2. Selection of high-quality raw materials
The quality of raw materials is the basis of the quality of finished products. We strictly screen austenitic stainless steel raw materials that meet international standards such as ASTM, JIS, DIN, etc., such as TP304/304L, TP316/316L, etc., to ensure that the chemical composition of the raw materials is stable and free of inclusions, providing a good foundation for subsequent cold drawing processing.
3. Precision mold design and manufacturing
The mold is the core tool in the cold drawing process, and its design accuracy and manufacturing quality directly affect the dimensional accuracy and surface finish of the steel pipe. We use high-precision CNC machining equipment, combined with advanced CAD/CAM technology, to design and manufacture cold drawing molds with high precision and high wear resistance. The inner hole size of the mold is accurate to the micron level, and the surface is specially treated to reduce friction with the steel pipe and reduce surface roughness.
4. Optimization of lubrication and cooling systems
During the cold drawing process, effective lubrication and cooling are essential to reduce friction, reduce temperature, and prevent scratches on the steel pipe surface. We use environmentally friendly and efficient lubricants, and through a precisely controlled lubrication system, we ensure that the steel pipe is evenly and fully lubricated during the cold drawing process. At the same time, we are equipped with an advanced cooling system to promptly remove the heat generated by friction and keep the steel pipe and the mold within a suitable working temperature range.
Management of mold selection and replacement cycle
1. Mold selection principles
The selection of molds needs to be comprehensively considered based on the material, specification, production batch and quality requirements of the steel pipe. For austenitic stainless steel large-diameter seamless pipes, we tend to choose mold materials with high hardness, high wear resistance and good thermal conductivity, such as cemented carbide or special alloy steel. At the same time, the mold design needs to fully consider the deformation characteristics of the steel pipe to ensure that the steel pipe can be deformed evenly and stably during the cold drawing process.
2. Mold replacement cycle management
The mold replacement cycle directly affects production efficiency and product quality. We have established a complete mold management system, and scientifically determine the mold replacement cycle by regularly testing the wear of the mold, recording production batches and output, and analyzing product quality data. Generally speaking, the mold replacement cycle depends on its material, usage conditions and production requirements. In a high-intensity, high-frequency production environment, we will shorten the mold inspection cycle, and replace it immediately if the mold is found to be severely worn or affects product quality.
We also pay attention to the maintenance and care of the mold, and regularly clean, demagnetize, and oil the mold to extend its service life and reduce production interruptions and quality problems caused by mold problems.
Company advantages and technological innovation
As an ISO and PED certified company, we have significant advantages in the production of austenitic stainless steel large-diameter seamless pipes. We not only have advanced production equipment and technical teams, but also have established a complete quality management system and customer service system. Through continuous technological innovation and product upgrades, we continue to improve the performance and quality of our products to meet the diverse needs of customers.
In terms of cold drawing technology, we continue to explore new technologies and processes, such as using advanced online detection technology to monitor the size and surface quality of steel pipes in real time, and using big data analysis to optimize cold drawing parameters to improve production efficiency and product quality. At the same time, we actively cooperate with well-known scientific research institutions at home and abroad to jointly develop new mold materials and cold drawing processes to promote technological progress in the industry.
During the cold drawing process of austenitic stainless steel large-diameter seamless pipes, we ensure the dimensional accuracy and surface finish of the steel pipes by precisely controlling the cold drawing parameters, selecting high-quality raw materials, designing precision molds, optimizing the lubrication and cooling systems, and scientifically managing the mold replacement cycle. At the same time, relying on the company's strong technical strength and strict quality management system, we continue to provide customers with high-quality and high-performance austenitic stainless steel seamless pipe products.