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Seamless Tubing

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One of these types of tubing is called seamless tubing, where extrusion or rotary piercing is used during the production process. Read More…

Seamless Tubing Tubing is used to move fluids or to protect electrical wires and cables housed within it. There are many different kinds of tubing and methods for manufacturing tubing.
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Leading Manufacturers

Skokie, IL  |  847-966-3000

Block Steel Corp, ISO/TS 16949 Certified, specializes in aluminized steel and is the country’s largest aluminized steel distributor. We also stock Aluminized Stainless, Hot Dipped Galvanized, and distribute tubing.

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Block Steel Corp. $$$

Bala Cynwyd, PA  |  800-355-0888

At Mainline Processing, we utilize our own facilities and equipment to meet our customers’ needs with an organized and growth-driven model. We stock large quantities of material in our inventory so that our customers can take advantage of purchasing opportunities where they can feel confident that they have the proper steel for the proper end use.

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Mainline Metals Inc. $$$

Birmingham, AL  |  800-462-2034

We are the nation’s largest family-owned metals service center. In business for 85 years, our steel service center is the source for all metal needs. Our structural steel includes many shapes such as steel tubing, along with cold rolled steel, tool steel, alloy steel, plate steel and carbon steel.

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O'Neal Steel, Inc. $$$

Grand Blanc, MI  |  888-273-8299

As a world-class source for steel products, King Steel Corporation supplies companies across North America with what they need to get the job done. For over 50 years, we have continued to invest a great amount of both time and capital into purchasing new equipment and streamlining our processes. We’ve worked diligently to develop and maintain a reputation in our industry that represents growth, professionalism, value, and prosperity for both our customers and suppliers.

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King Steel Corporation $$$

Houston, TX  |  800-749-4621

Cold Rolled Steel is a mill product made with a high degree of gauge accuracy and uniformity of physical characteristics. The smooth deoxidized matte finish gives an excellent base for paint, lacquer and enamel. Box annealing and absence of scale permit stamping and moderate drawing operations. Sheets bend flat on themselves without cracking. Our Cold Rolled sheet and coil conform to ASTM A1008.

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Curtis Steel Co., Ltd. $$$
placeholder image Block Steel Corp. Mainline Metals Inc. O'Neal Steel, Inc. King Steel Corporation Curtis Steel Co., Ltd.

A seamless pipe is created by drawing a solid billet over a piercing rod to create a hollow shell. Most seamless tubing is pulled through a die that reduces its diameter in the final stages of manufacturing. This yields a strong product, and without any welding lines you are left with a tube that is less susceptible to corrosion and has no weak points in its structure.

To control the wall thickness, a plug is inserted into the tube while it is being drawn. This plug moves through the tube as pressure is applied, keeping the wall thickness even throughout the tube.

Seamless tubes are used in almost every industry, from construction to agriculture to healthcare. Many hand rails and guardrails are simply pieces of seamless tubing. A seamless tube is light and rigid so that it can easily be cut and installed in a wide variety of applications.

Steel is often used to create seamless tubes, but they are also made out of ceramic, fiberglass, other metals and even concrete or plastic. Obviously plastic is the most malleable of the materials, and this is most commonly used for applications where some flexibility in the tube is required.

Seamless tubes can be bent during manufacturing to create 90 degree angles if they are being fitted to a particular product. Plastic seamless tubing is becoming much more popular because it is light weight, chemical free and non-corrosive. It can easily be cut and connected for a wide variety of uses.

Tube sizes are measured based on the diameter on the outside of the tube. As pipes have improved, the walls have become thinner while still remaining strong, creating a larger internal diameter which allows for more flow. The primary advantage of using a seamless tube is that it is able to withstand a much greater amount of pressure because of the equal strength around the circumference. The seam in a traditional welded tube makes it much more vulnerable to bursting when high pressure volumes pass through it.

Seamless Tubing Informational Video