Stainless Steel Seamless Tubing

At Sun Steel, we specialize in delivering premium seamless stainless steel tubing designed to meet the highest industry standards. Our seamless tubing offers unmatched durability, corrosion resistance, and precision. This makes them the preferred choice for industries requiring superior mechanical properties and performance in critical applications.

Whether you're looking for seamless steel tubes for structural applications, high-temperature environments, or highly corrosive conditions, we have the expertise to supply the best products. Choose your seamless tube sizes and we’ll deliver quality!

Overview of Seamless Tubing

All no-weld tubes are considered seamless. Their advantage is that they will not have the inherent weak point of the weld as part of their design. Our tubing is stronger, has higher corrosion resistance, and performs better in extreme environments than its welded counterpart.

Product Grades

• 304/L/H/LN: General-purpose, low carbon.

• 316/L/H/LN/Ti: Higher corrosion resistance.

• 310S/H: High-temperature resistance.

• 317/L: Enhanced molybdenum content for better corrosion resistance.

• 347/H/HFG: High strength at elevated temperatures.

Relevant Standards

• ASTM: A213, A249, A269, A312, A358, A688, A789, A790.

• ASME: SA213, SA249, SA269, SA312, SA358, SA688, SA789, SA790.

• GB: GB/T 5310, GB/T 13296, GB/T 17395, GB/T 24593, GB/T 14976, GB/T 12771.

• ISO: ISO 9001

Core Benefits

• Corrosion resistance: Ideal for chemical and moist environments.

• High-temperature durability: Suitable for heat exchangers and boilers.

• Long-term use: Durable and low-maintenance.

Austenitic stainless steel remains a top choice for industries needing reliable, corrosion-resistant, and durable seamless steel tubing across various sectors. Our team, as one of the world’s leading seamless tubing suppliers. We make sure nothing is missed or overlooked. All of our pieces conform to the latest ASTM and ASME standards and are available in a wide range of seamless tube dimensions, sizes, and cuts.

This is all possible thanks to the highly flexible nature of our manufacturing process. Our seamless steel tubes are made via an extrusion process and 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 Stainless Steel Tubing

• 304 Seamless Stainless Steel Tubing — composed of 18% chromium and 8% nickel, this is one of the most widely used options. 304 seamless tubing is commonly used in food processing, chemical plants, heat exchangers, and automotive systems. Best suited for general manufacturing, kitchen equipment, and dairy industries.

• 304/L Stainless Steel Seamless Tubes — the best choice when carrying corrosive materials like potent acids and other chemical solutions. The lower carbon content in 304L enhances its resistance to sensitization, which makes it more effective in environments exposed to extreme temperatures or harsh chemicals. Ideal for extreme environments such as chemical processing, power plants, and aerospace.

• 316 Stainless Steel Tube — 316 stainless steel tube is known for its superior corrosion resistance, especially in chloride-rich environments. The addition of molybdenum enhances its ability to withstand pitting and crevice corrosion. This seamless stainless steel tubing grade maintains excellent mechanical properties. Available in various seamless tube dimensions, it ensures precision and reliability. Best for industries such as marine, chemical processing, and offshore oil and gas.

• 316/L Stainless Steel Seamless Tube — a non-toxic, non-corrosive metal that is widely used in the food and pharmaceutical industries. The addition of molybdenum in 316L enhances its resistance to pitting and crevice corrosion, which makes it ideal for handling liquids and gases in sanitary and high-purity applications. Commonly used in food processing, medical equipment, and biotechnology.

Applications of Seamless Stainless Tubing

Engineers worldwide use our wide array of tube sizes to easily deliver projects on time and within budget. We deliver such a diverse range of seamless tube sizes because the use cases expand all the time, which allows 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 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. Seamless stainless steel tube brings superior strength and corrosion resistance to the table.

• Automotive, marine, and aerospace 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 tubing design neatly sidesteps 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 such a design. They allow for greater contact accuracy, longer lifetimes, and a higher level of optimized performance. Stainless seamless tubing enhances structural integrity, which makes it ideal for difficult construction and other critical applications.

Our team 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.

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 of seamless tubing suppliers makes sure nothing is missed or overlooked.

• Fully reliable supply chains will never leave you waiting for urgent seamless tubing shipments.

• Fast and flexible communications mean you’re never forced to chase for updates.

• Unrivaled industry expertise guarantees you receive optimal seamless tubing that will bring your next project to life.

• Adherence to stringent quality control measures makes sure every seamless stainless steel tubing meets the highest standards. Our products comply with international certifications such as ISO 9001, ASTM, GB, and ASME and guarantee 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.

For detailed information, check out the Seamless Tube Technical Specifications PDF file.