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316L Stainless Steel Pipe is the low-carbon version of 316 stainless steel, offering excellent corrosion resistance and enhanced weldability in chloride-rich and chemically aggressive environments. Its reduced carbon content helps minimize carbide precipitation during welding, making it ideal for fabricated piping systems requiring long-term corrosion protection.
Widely used in marine equipment, chemical processing facilities, pharmaceutical systems, and industrial applications exposed to harsh service conditions.
316L stainless steel pipe (also known as UNS S31603 stainless tubing, EN 1.4404 seamless steel pipe, or low-carbon marine grade 316L welded tube) is an extra-low carbon molybdenum-bearing austenitic stainless steel pipe system engineered for maximum corrosion resistance, superior weldability, and exceptional pressure containment in severe chemical, marine, and industrial environments. Containing a maximum carbon content of 0.03%, 316L stainless steel pipes completely prevent harmful carbide precipitation during high-temperature welding.
At XQJ Metal, we manufacture and supply high-precision 316L stainless steel pipes in both seamless and welded (ERW, EFW) configurations. Produced in strict compliance with ASTM A312, ASTM A213, ASTM A269, and EN 10216-5 standards, our marine-grade low-carbon stainless pipes feature uniform wall thickness, smooth inner bore surfaces, and certified pressure rating performance.
| Parameter | Standard Value / Specification |
| Material Grade | AISI 316L / UNS S31603 / EN 1.4404 / SUS 316L |
| Chemical Composition | Cr: 16.0–18.0%, Ni: 10.0–14.0%, Mo: 2.0–3.0%, C: ≤ 0.03% |
| Outer Diameter (OD) | 6.0mm – 630mm (1/8″ to 24″ NPS) |
| Wall Thickness / Schedule | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS |
| Pipe Manufacturing Types | Seamless Cold Drawn / Cold Rolled, Welded (ERW / TIG / EFW) |
| Surface Finishes | Annealed & Pickled (AP), Bright Annealed (BA), Mechanical Polish (180#–800#) |
| International Standards | ASTM A312, ASTM A213, ASTM A269, EN 10216-5, JIS G3459, ISO 9001 |
Q1: What is the main difference between 316 and 316L stainless steel pipes?
A: The primary difference is carbon content: 316L contains ≤ 0.03% carbon compared to 0.08% in standard 316. This extra-low carbon level prevents intergranular corrosion in the heat-affected zone (HAZ) during heavy welding without requiring post-weld solution annealing.
Q2: Should I choose Seamless or Welded 316L stainless steel pipes for my project?
A: Seamless 316L pipes offer higher pressure ratings and continuous grain structure, making them preferred for high-pressure, critical chemical, and high-temperature environments. Welded 316L pipes are cost-effective for large-diameter pipelines and standard fluid transport applications.
Q3: What is your Minimum Order Quantity (MOQ) for custom cut 316L pipes?
A: Our standard MOQ for stock pipe sizes is 200 kg or 10 full pipe lengths (6 meters each). Custom diameter or special wall thickness orders can be evaluated individually.
If you require specific pipe schedules, custom beveling ends, or technical datasheets, explore our full range of Stainless Steel Pipe Products or Contact Our Sales Engineering Team directly for a fast factory quotation.
Our materials support a wide range of construction and infrastructure projects
316L stainless steel pipe has a lower carbon content than 316, helping reduce the risk of intergranular corrosion after welding while maintaining excellent corrosion resistance. It is commonly selected for welded piping systems and fabricated process equipment.
The low carbon content of 316L helps reduce carbide precipitation in welded areas, allowing the pipe to better maintain its corrosion resistance after fabrication. It is widely used for piping systems that involve extensive welding.
Yes. 316L stainless steel pipe is widely used in pharmaceutical, food, beverage, and other hygienic processing systems because of its corrosion resistance and good fabrication characteristics. Material selection should comply with the applicable industry standards and project requirements.
It offers excellent resistance to seawater corrosion and maintains strength in humid and salt-rich conditions.
No. Strength is achieved through strain hardening rather than heat treatment.
Yes. It provides excellent weldability for structural fabrication.
Yes, it is commonly applied in tanks and pressure equipment.
Yes. It provides higher strength compared with most non-heat-treated aluminum alloys.
Yes. Thickness, width and temper can be adjusted based on project demand.
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