Find a seamless tubing supplier who can fulfill any size of order, and your business will have an instant competitive advantage. Sun Steel Co., Ltd. continues to lead the industry from our base here in Zhejiang, China. We offer a range of tubing across a broad range of alloys designed to offer high-end quality and premium performance and reliability across a diverse range of industries. Our industrial clients include chemical processing, engineering, and pharmaceuticals.

Overview of Tubing Options

Any tubing that isn’t formed using a weld to finish the join can be thought of as seamless. The advantage of seamless tubes is that they will not have the inherent weak point of the weld as part of their design. A joint will expand and contract as temperatures change, and it will also act as a failure point when under intense mechanical stress. In addition, tubing that is welded is also more prone to corrosion and degradation due to ingress. Our tubing is stronger, has higher corrosion resistance, and has optimal uniformity.

Sun Steel, as one of the world’s leading suppliers, takes care to ensure nothing is missed or overlooked. All of our stainless steel tubing pieces conform to the very latest ASTM and ASME standards and are available in a wide range of sizes and cuts. This is all possible thanks to the highly flexible nature of our manufacturing process. Sun Steel tubes are made via an extrusion process. When tubes are made, they are drawn off of a solid block of the same metal through a mold. The result is tubing that has a continuous surface and is never interrupted by the presence of a sealing weld.

Seamless Steel Tube Products

We’re proud to supply seamless steel tubes in a wide array of different varieties and classes:

304/L Stainless Steel Seamless Tubes — the best solution when carrying corrosive materials like potent acids and other chemical solutions. The lower carbon content in 304L enhances its resistance to sensitization, making it more effective in environments exposed to extreme temperatures or harsh chemicals.
316/L Stainless Steel Seamless Tube — a non-toxic, non-corrosive seamless steel tube that is widely used in the food and pharmaceutical industries. The addition of molybdenum in 316L enhances its resistance to pitting and crevice corrosion, making it ideal for handling liquids and gases in sanitary and high-purity applications.
Duplex 2205 Stainless Steel Tube — offers exceptional strength and corrosion resistance, making it the perfect choice for highly corrosive environments, such as chemical processing, marine, and oil and gas industries. Its high chromium and molybdenum content provides enhanced protection against stress corrosion cracking and pitting, while its duplex structure ensures superior durability under pressure.

These diverse options guarantee that you’ll find the best solution tailored to your specific industry requirements.

Applications of Seamless Tubes

Engineers around the world use our wide array of seamless tube sizes to deliver projects on time and budget with ease. We deliver such a diverse range of seamless tube sizes because the use cases expand all the time, allowing you to create solutions that will stand the test of time. Here are some common applications we can help with:

Oil and gas supplies benefit from the seamless nature of these weld-free tubes because they will not introduce weak points and points of failure into critical systems. Welds can corrode and are the most likely source of leakages and spills when used with these types of high-pressure systems.
Automotive systems typically have to withstand substantial temperature changes in a very short space of time, at the same time as undergoing huge mechanical stress. The difference in the thermal expansion coefficient of the weld versus that of the tube as a whole will always cause problems. A seamless design neatly sidesteps all of these issues by removing a common point of failure.
Construction projects that need precise tolerances and high levels of repeatability benefit significantly from the high-performance nature of seamless designs. They allow for greater accuracy, longer lifetimes, and a higher level of optimized performance.

Sun Steel is committed to providing top-quality seamless steel tubes that deliver unmatched reliability and performance across a wide range of industries. Whether you're working in oil and gas, automotive, or construction, our seamless pipes and tubes are designed to eliminate weak points, resist corrosion, and handle extreme conditions with ease.

Why Choose Us as Your Seamless Tubing Supplier?

At Sun Steel, we pride ourselves on delivering seamless tubing solutions that set the industry standard for quality and performance. Here's why we're the trusted tubing supplier across various industries:

Comprehensive quality assurance makes sure nothing is missed or overlooked.
Fully reliable supply chains ensure that you’re never left waiting for urgent shipments.
Fast and flexible communications mean you’re never forced to chase for updates.
Unrivaled industry expertise guarantees you receive optimal tubing solutions that will bring your next project to life.
We adhere to stringent quality control measures, ensuring every seamless tube meets the highest standards. Our products comply with international certifications such as ISO 9001, ASTM, and ASME, guaranteeing durability and performance in the most demanding environments.

When you choose Sun Steel, you’re choosing quality, reliability, and expertise. Let us be your partner and ensure your projects are completed with precision and confidence.