Custom Fire Fighting Pipes,Seamless and Welded Steel Pipes Manufacturer Since 1991.
Seamless Carbon Steel Pipe
Baolai’s Carbon Seamless steel pipe size is from 1/2″-36″ of API, ASTM, BS, DIN and JIS standard with many certificates for quality assurance.
Seamless steel pipe is a hollow section circular pipe without seams. Carbon Seamless Steel Pipe is made by hot rolling, cold rolling or cold drawing, which is the common material used for oil and gas, water pipline, conatruction, and boiler.
Product Description
Seamless steel pipes are 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.
Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industry, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation.
Production Process
Cold-Drawing
Cold rolling, done often at room temperature, has the added effect of work hardening and strengthening the material thus further improving the material’s mechanical properties. It also improves the surface finish and holds tighter tolerances. However, room temperature steel is less malleable than hot steel, so cold rolling cannot reduce the thickness of a work piece as much as hot rolling in a single pass. Commonly cold-rolled products often include similar hot rolled products like sheets and bars, but are usually smaller.
Hot-Rolling
Hot rolling is typically not as costly or as expensive as cold rolling or cold drawing, as the steel is more malleable at a higher temperature. There is also one less step when producing the steel, which cuts back on the operating costs of producing the steel. The finish of the steel will not be as smooth or clean as cold rolled or drawn steel, and mechanical properties of the steel are typically not as good as steel in its cold drawn form. This often is not important for steel products that are produced in high quantity and do not need a clean external finish.
Seamless Steel Pipe Services we offer
Cutting
Water jet technology, also known as water jet and water cutting technology, is a real cold cutting. speed jet water cutting.
Beveling
We can apply any type of Bevel to any degree desired. Beveling can be applied to the surface of pipes of any size or diameter.
Threaded
Pipe thread is a thread located on the pipe wall for connection, mainly used for the sealing connection of water, gas, oil and other pipelines. We offer NPT* and BSPT* pipe threads.
FAQ
What is carbon seamless steel pipe and how is it made?
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Carbon seamless steel pipe is a type of steel pipe manufactured from solid round steel billets without any welded seams on the surface. It is produced through hot rolling, cold rolling, or cold drawing processes. Because there are no welds, seamless carbon steel pipes offer superior strength, pressure resistance, and uniformity — making them ideal for high-demand industrial applications.
What are the common grades and standards for carbon seamless pipes?
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Our carbon seamless steel pipes are available in widely recognized standards including ASTM A106 Grade B, ASTM A53, and API 5L. ASTM A106 seamless pipes are especially suited for high-temperature service in refineries and power plants. We support custom specifications to meet your project requirements.
What is the difference between hot rolled and cold drawn seamless carbon steel pipes?
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Hot rolled seamless pipes are produced at high temperatures, making the steel more malleable and the process more cost-effective — ideal for large-quantity orders where surface finish is less critical. Cold drawn seamless pipes are processed at room temperature, resulting in tighter dimensional tolerances, a smoother surface finish, and improved mechanical properties. The right choice depends on your application's pressure, temperature, and surface requirements.
What industries use carbon seamless steel pipes?
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Carbon seamless steel pipes are widely used across multiple industries, including: Oil & gas — geological drilling, pipeline transportation Petrochemical — cracking pipes and high-pressure lines Power generation — boiler and heat exchanger tubing Automotive & aerospace — high-precision structural components Bearing manufacturing — bearing pipe applications
Can you customize carbon seamless pipes, and what processing services do you offer?
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Yes. As a dedicated carbon seamless pipe manufacturer, we offer full customization including size, wall thickness, grade, and end treatment. Our in-house processing services include water jet cutting, beveling (any degree and diameter), and threading (NPT & BSPT standards) — ensuring pipes arrive ready for direct installation.
