China Seamless Steel Tube Manufacturers, Suppliers, Factory - Customized Seamless Steel Tube Made in China

China ISO9001:2016 and IATF16949 certificated seamless steel tube manufacturer with high quality, competitive price and on-time delivery. We can provide the subsequent processing.Quality supervision throught the whole precess of production till container loading; The mature supply chain system, advanced equipment and technology ensure our price competitive; The mature logistics system & self owned freight forwarder ensure the OTD rate reaches 95%.

HEBEI CBIES AUTOMOTIVE PARTS CO., LTD. : Your Trustworthy Seamless Steel Tube Manufacturer！

CBIES AUTOMOTIVE is a leading manufacturer of automotive parts and components in China, specializing in the designing, manufacturing, and after-sales maintenance of automotive precision tubes and parts with a rich experience of 18 years.

Rich Product Variety

We mainly deal in seat frames, car beams, side door anti-collision beams, chassis tubes, exhaust pipes, shock absorbers, torsion bars and other auto parts.

Wide Sales Areas

Our main markets include North America, Central and South America, the European Union, Southeast Asia, Central Asia and other regions.

Guaranteed Quality

Our products have obtained IATF16949:2016, ISO 9001: 2015, ISO14001: 2015, ISO45001: 2018 and other certifications. We have a strict internal quality control system, a professional quality control team and advanced equipment to ensure that all products can fully meet customer requirements and international standards.

Leading Service

We have many years of industry experience and a complete production management, quality supervision and sales service operation system. Whether you want to buy a side door anti-collision beam or a chassis tube, just send your needs by email and we can customize the product for you.

Products

Seamless Tubes

Shock Absorbor Seamless Steel Tube

DIN2391 Shock Absorbor Seamless Steel Tube

Cold Drawn Seamless Tubes

Hebei CBIES Automotive Parts Co., Ltd. is one of the leading seamless steel tube manufacturers and suppliers in China. We warmly welcome you to wholesale customized seamless steel tube made in China here and get quotation from our factory. For price consultation, contact us.

Shock Absorbor Seamless Steel Tube, Seamless Steel Tube, ASTM A519 Shock Absorbor Seamless Steel Tube

What is Seamless Steel Tube

Seamless Steel Tube is perforated from whole round steel, and steel pipes without welds on the surface are called seamless steel pipes. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and top pipes.

Features of Seamless Steel Tube

01/

Tensile Strength
Seamless Steel Tube exhibit high tensile strength, enabling them to withstand significant internal and external pressures. This property is crucial in high-pressure environments like oil and gas pipelines.

02/

Adaptability
This property is particularly important in areas with frequent movements, such as seismic zones or offshore platforms, where pipes need to withstand bending and shifting without compromising integrity.

03/

Absorbing Stress
Flexibility and elasticity allow the pipes to absorb and redistribute stress, preventing fractures in dynamic load environments.

04/

Yield Strength
The high yield strength ensures that these pipes maintain shape and integrity under pressure, essential in applications requiring long-term reliability without deformation.

05/

Withstanding Harsh Environments
Alloying elements like chromium and nickel enhance the pipes’ resistance to rust and corrosion, crucial for longevity in corrosive environments.

06/

High-Temperature Operations
Seamless steel pipes can perform reliably in high-temperature settings, making them suitable for steam systems and power plants.

Materials of Seamless Steel Tube

Carbon Seamless Steel Tube

This kind of steel pipe has a high carbon content and has good processability, weldability and mechanical properties. It is mainly used in construction, machinery and other fields, but its disadvantage is that it is easy to rust and requires anti-corrosion treatment.

Stainless Seamless Steel Tube

This kind of steel pipe has excellent corrosion resistance, high temperature resistance and aesthetics. It is mainly used in chemical industry, medicine, food, aviation and other fields. However, its price is higher and processing is difficult.

Alloy Seamless Steel Tube

This kind of steel pipe contains a variety of alloy elements and has good corrosion resistance, high temperature resistance and strength. It is mainly used in petroleum, chemical industry, aviation, aerospace and other fields. However, it is more expensive and difficult to process.

High-Pressure Seamless Steel Tube

This kind of steel pipe is used for high-pressure pipelines (seamless boiler tube), usually made of carbon steel, alloy steel and other materials. It is mainly used in petroleum, chemical industry, electric power and other fields, but its price is high and processing is difficult.

Titanium Alloy Seamless Steel Tube

This kind of steel pipe contains titanium element and has excellent corrosion resistance, high temperature resistance and strength. It is mainly used in aviation, aerospace, medical and other fields. However, it is more expensive and difficult to process.

Aluminum Alloy Seamless Steel Tube

This kind of steel pipe contains aluminum elements and has good corrosion resistance, high temperature resistance and strength. It is mainly used in aviation, aerospace, automobile and other fields. However, it is more expensive and difficult to process.

Process of Seamless Steel Tube

Raw Material Selection and Preparation
The first step in the seamless steel tube manufacturing process is the selection of high-quality raw materials. Typically, seamless pipes are made from carbon steel, stainless steel, or alloy steel. The raw materials undergo inspection, testing, and quality control measures to ensure their suitability for pipe production. After verification, the raw materials are prepared through processes such as heating, descaling, and cutting.

Pipe Formation: Hot Piercing and Rotary Piercing
The tube formation stage involves two primary methods: hot piercing and rotary piercing. Hot piercing involves heating the prepared billet and piercing it with a piercing mill to create a hollow shell. Rotary piercing, on the other hand, utilizes a rotating mandrel and piercing rolls to achieve a seamless pipe with precise dimensions and wall thickness. These processes are critical in ensuring the integrity and uniformity of the pipe structure.

Elongation and Sizing
Following the piercing process, elongation and sizing operations are performed to further refine the pipe dimensions. Elongation involves elongating the pierced shell using a push bench or a stretch reducing mill. This process enhances the mechanical properties and reduces wall thickness variations. Sizing, which is done using a sizing mill, ensures accurate outer diameter and wall thickness according to specifications.

Heat Treatment and Finishing
Heat treatment is a vital step in the manufacturing process to enhance the mechanical properties of seamless steel pipes. Processes such as annealing, normalizing, or quenching and tempering are employed to achieve desired strength, hardness, and toughness. After heat treatment, the pipes undergo finishing operations, including straightening, cutting, and surface treatment. These processes ensure precise dimensions, smooth surfaces, and corrosion resistance.

Final Inspection and Quality Assurance
The final stage of the manufacturing process involves comprehensive inspection and quality assurance. The seamless steel tube undergo various tests, including dimensional checks, visual inspection, non-destructive testing, and mechanical property evaluation. These rigorous inspections guarantee that the pipes meet the required standards and specifications. Only after passing the inspection, the pipes are ready for packaging, storage, and distribution.

How to Choose Seamless Steel Tube

Know The Grade
Seamless Steel Tube come in several grades, each with unique characteristics and properties. Understanding the grade of the pipe you need for your project is crucial. Higher-grade Seamless Steel Tube are excellent for high-pressure applications like oil and gas transmission. On the other hand, lower-grade pipes are perfect for typical water transmission. Knowing your desired pipe grade will help you avoid wasting resources, money, and time.

Check The Weight And Size
Seamless Steel Tube come in different sizes and weights, and choosing the right one depends on the pipe’s intended use and structural design. Ensure you get the measurements right to avoid unnecessary costs and delays in your project. Calculate the weight of the pipes needed to carry out your project and adhere to standard pipe size to avoid compromising performance.

Consider Corrosion Resistance
Corrosion is a significant issue affecting your carbon steel pipe’s integrity, performance, and longevity. Therefore, selecting a corrosion-resistant carbon steel seamless pipe that can withstand the environment in which it will be used is essential. Selecting a pipe with an anti-corrosion coating or using a chemical treatment approach is recommended.

Think About Temperature And Pressure Limits
A Seamless Steel Tube temperature and pressure limits are essential for avoiding any issues of temperature changes or internal/external pressure fluctuations. Ensure your selected pipe has suitable temperature and pressure limits for your specific application. Pipes with higher temperature and pressure limits may be ideal for more intense projects, while lower limits may be suitable for general applications.

How to Maintain Seamless Steel Tube

Avoid Metal to Metal Contact
It is important to note that when you are first laying out your steel pipes, you need a strategic plan to place them in a manner where contact with other metals is minimal. Constant contact of tubes with other metals can lead to frictional damages such as scratches and dents. In addition, metal-to-metal contact may also cause corrosion. Placing your seamless pipes at a reasonable distance from each other can help prevent this.

Reduce Seamless Pipe and Steel Movement
Loosely-arranged or dangling pipes are another reason for early damage to the steel pipes. This makes them vulnerable to friction, jolt or displacement damage, especially during transportation.

Carry Out Regular Inspection
Regular inspection is an excellent way to prevent pipe damages from getting graver or irreparable. It is a common mistake of owners to skip this step and land in situations when corrosion, leaks, and breakage start to happen regularly. Faulty pipelines can lead to accidents and costly replacement of pipes, which can be prevented earlier.

Clean and Polish Steel Pipes Regularly
With watchful cleaning and polishing of seamless steel pipes, you can easily prevent the accumulation of dirt and grime in your pipes. Upon consultation with your pipe provider, you can also use specified chemicals to clean the insides of the tubes. After cleaning, do not forget to lubricate the pipes after.

Identify and Make Repairs
Even though most pipe repairs require professional help, you can easily tackle certain maintenance. If you identify minor damages early, there are some handy repairs like sealing leaks, holes and cracks with putty or specialised plumber bandages, which you can do yourself.

Applications of Seamless Steel Tube

Oil and Gas Industry
Seamless Steel Tube is the backbone of the oil and gas industry, used for the transportation of crude oil, natural gas, and various petroleum products. Their ability to withstand extreme pressure and temperature conditions makes them indispensable for this sector.

Power Generation
Power plants rely on seamless steel pipes to transport steam at high temperatures and pressures. They are also used in the construction of boilers and heat exchangers.

Automotive and Aerospace
Seamless Steel Tube is used in the manufacturing of automotive components and aircraft parts. Their high-strength properties make them ideal for applications where safety and reliability are paramount.

Construction
In construction, Seamless Steel Tube is used for structural purposes, such as in the fabrication of columns and supports. They are also employed in plumbing and heating systems.

Manufacturing
Seamless Steel Tube find applications in various manufacturing processes, including the production of machinery, equipment, and tools.

Frequently Asked Questions

Q: What is Seamless Steel Tube?

A: Seamless steel tubes are cylindrical hollow sections made from a solid billet of steel without any longitudinal joints or seams. The process of creating seamless tubes involves heating the billet to a high temperature and then extruding it through a die to form the tube shape. This is followed by cold working to achieve the desired dimensions and mechanical properties.

Q: How are Seamless Steel Tubes Manufactured?

A: The manufacturing process begins with selecting the appropriate steel grade based on the intended application. The steel billet is preheated and then送入 a piercing mill, where a mandrel pierces the center of the billet, creating a hollow cavity. Following this, the tube is hot-extruded through a ring die to reduce its diameter and extend its length. After cooling, the tube may undergo further processing such as cold rolling, turning, and flanging to achieve precise dimensions and surface finish.

Q: What are the Advantages of Seamless Steel Tubes?

A: Seamless steel tubes offer several advantages over welded tubes, including superior strength due to the absence of welded seams, better resistance to pressure and impact, and enhanced fatigue life. They also have excellent corrosion resistance and can be easily joined using various methods such as welding, flanging, and threading. Additionally, seamless tubes provide a smoother internal surface, which reduces friction and improves flow characteristics.

Q: What Applications do Seamless Steel Tubes Have?

A: Seamless steel tubes are widely used in various industries, including the oil and gas industry for drilling and production operations, the chemical industry for piping and reaction vessels, the automotive industry for exhaust systems and structural components, and the power generation industry for boiler tubes and superheater tubes. They are also utilized in the construction industry for structural applications and in the sports equipment industry for high-performance bicycle frames and golf clubs.

Q: What Materials are Used to Manufacture Seamless Steel Tubes?

A: The material choice for seamless steel tubes depends on the specific application and required properties. Common materials include carbon steel, alloy steel, stainless steel, and low-temperature steel. Each material offers different combinations of strength, ductility, corrosion resistance, and weldability. For example, stainless steel is often used in applications requiring high corrosion resistance, while low-temperature steel is used in applications involving cryogenic temperatures.

Q: What are the Mechanical Properties of Seamless Steel Tubes?

A: Seamless steel tubes exhibit excellent mechanical properties, including high tensile strength, yield strength, and elongation. The exact values depend on the steel grade and heat treatment process. In general, seamless steel tubes have a higher strength-to-weight ratio compared to welded tubes, making them ideal for applications requiring lightweight yet strong structures.

Q: How are Seamless Steel Tubes Tested and Inspected?

A: Seamless steel tubes undergo rigorous testing and inspection to ensure their quality and reliability. Tests include visual inspection for surface defects, ultrasonic testing for internal defects, hydrostatic pressure testing for leakage, and hardness testing for material properties. Additionally, non-destructive testing methods such as magnetic particle inspection (MPI) and dye penetrant inspection (DPI) may be used to detect hidden defects.

Q: What are the Standards Governing Seamless Steel Tubes?

A: Seamless steel tubes are subject to various national and international standards depending on their country of origin and intended use. Common standards include API (American Petroleum Institute), ASTM (American Society for Testing and Materials), DIN (Deutsches Institut für Normung), and ISO (International Organization for Standardization). These standards specify the material composition, manufacturing process, dimensional tolerances, mechanical properties, and testing requirements for seamless steel tubes.

Q: How do Seamless Steel Tubes Compare to Welded Steel Tubes?

A: Seamless steel tubes generally outperform welded tubes in terms of strength and durability due to the absence of welded seams, which are potential points of weakness. Welded tubes are prone to fatigue cracking and corrosion at the weld joint, while seamless tubes have a more uniform structure throughout their length. However, welded tubes are typically less expensive and easier to manufacture, making them suitable for some applications where strength requirements are not as critical.

Q: What is the Difference Between Hot-Formed and Cold-Worked Seamless Steel Tubes?

A: Hot-formed seamless steel tubes are extruded at high temperatures, resulting in a tube with a coarse grain structure and reduced strength. Cold-worked seamless steel tubes are subjected to additional deformation at room temperature, which refines the grain structure and increases strength. Cold-worked tubes are generally stronger and more dimensionally stable than hot-formed tubes but may be more susceptible to cracking during manufacturing.

Q: What are the Challenges in Manufacturing Seamless Steel Tubes?

A: Manufacturing seamless steel tubes presents several challenges, including maintaining consistent material quality, achieving precise dimensions and tolerances, preventing surface defects, and ensuring the integrity of the tube during the manufacturing process. Advanced manufacturing techniques and quality control measures are required to produce high-quality seamless steel tubes that meet stringent industry standards.

Q: How are Seamless Steel Tubes Joined Together?

A: Seamless steel tubes can be joined together using various methods, depending on the application and required strength. Common joining methods include welding (using techniques such as MIG, TIG, or SMAW), flanging (where the ends of the tubes are bent to create an overlapping joint that is then welded or sealed), and threading (where threads are cut onto the ends of the tubes to screw them together). The choice of joining method depends on factors such as the tube material, diameter, wall thickness, and operating conditions.

Q: What is the Future of Seamless Steel Tube Technology?

A: Advances in manufacturing technology and materials science are driving continuous improvements in seamless steel tube performance. New manufacturing processes, such as additive manufacturing and advanced extrusion techniques, are being developed to produce seamless steel tubes with improved mechanical properties and reduced production costs. Additionally, the development of new high-strength steel grades and corrosion-resistant alloys is expanding the range of applications for seamless steel tubes.

Q: How are Seamless Steel Tubes Stored and Handled?

A: Proper storage and handling of seamless steel tubes are crucial to prevent damage and ensure their longevity. Tubes should be stored in a dry, clean environment protected from moisture and corrosive substances. They should be stacked vertically or horizontally on supports spaced at appropriate intervals to prevent deformation and buckling. When handling, care should be taken to avoid impact, abrasion, and exposure to harmful environments. Special lifting equipment such as slings or cradles should be used to prevent damage to the tube ends or surfaces.

Q: What are the Environmental Considerations in the Production of Seamless Steel Tubes?

A: The production of seamless steel tubes has a significant environmental impact due to the energy consumption and emissions associated with the steelmaking and manufacturing processes. To mitigate these impacts, the industry is adopting various sustainability practices, such as reducing energy consumption through process optimization, using recycled materials, implementing waste reduction strategies, and employing cleaner production technologies. Additionally, regulatory compliance with environmental laws and regulations is essential to minimize the impact of seamless steel tube production on the environment.

Q: How do Seamless Steel Tubes Impact Safety in Industrial Applications?

A: Seamless steel tubes play a critical role in ensuring safety in industrial applications by providing structural support and containing fluids under high pressure. The failure of a seamless steel tube can result in catastrophic consequences, such as equipment breakdown, product contamination, and personal injury. Therefore, it is essential to ensure the quality and reliability of seamless steel tubes through proper material selection, manufacturing process control, and rigorous testing and inspection procedures. Additionally, proper installation, maintenance, and replacement of seamless steel tubes are crucial to maintain their integrity and safety performance throughout their service life.

Q: What is the Cost of Seamless Steel Tubes?

A: The cost of seamless steel tubes varies depending on several factors, including the material grade, diameter, wall thickness, length, manufacturing process, and order quantity. Generally, seamless steel tubes are more expensive than welded tubes due to the complexity and cost of the manufacturing process. However, the total cost of ownership of seamless steel tubes may be lower in the long run due to their superior strength and durability, which can reduce maintenance and replacement costs.