Stainless Steel Seamless Pipe
304 / 316L Series
Manufactured from high-purity stainless steel alloys through precision cold drawing, delivering excellent corrosion resistance, high-temperature performance, and mechanical strength for petrochemical, food processing, medical, and architectural applications.
This series of stainless steel seamless pipes is produced using vacuum induction melting and refining, with strict production control in accordance with ASTM A312 / GB/T 14976 standards. Both inner and outer surfaces are precision cold drawn, achieving surface roughness of Ra ≤ 0.8 μm, excellent weldability, and reliable machinability for long-term service in demanding industrial environments.
Superior Corrosion Resistance
Stable passive film with strong resistance to pitting and crevice corrosion; suitable for acidic, alkaline, and chloride-containing media
Excellent High-Temperature Strength
Maintains excellent oxidation resistance and creep performance under high-temperature conditions of 400–800 °C
Seamless Integral Forming
No weld defects, uniform pressure-bearing capacity, ideal for high-pressure fluid transfer and precision instrumentation piping
Hygienic Cleanliness Grade
High internal surface finish meeting FDA / GMP requirements for food, medical, and hygienic applications
Excellent Weldability
Low-carbon design, especially 316L, minimizes post-weld heat treatment requirements and improves intergranular corrosion resistance
Multi-Standard Compliance
Compliant with GB, ASTM, EN, and JIS standards for global applicability and stable supply
| Steel Grade / Material Grade | Outer Diameter OD (mm) | Wall Thickness WT (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Hardness HRB |
|---|---|---|---|---|---|
| 304 / S30400 | 6 – 219 | 0.5 – 12 | ≥ 205 | ≥ 515 | ≤ 92 |
| 304L / S30403 | 6 – 168 | 0.5 – 10 | ≥ 170 | ≥ 485 | ≤ 88 |
| 316 / S31600 | 8 – 219 | 1.0 – 16 | ≥ 205 | ≥ 515 | ≤ 95 |
| 316L / S31603 | 8 – 219 | 1.0 – 20 | ≥ 170 | ≥ 485 | ≤ 88 |
| 321 / S32100 | 10 – 168 | 1.0 – 12 | ≥ 205 | ≥ 515 | ≤ 92 |
| 2205 Duplex Stainless Steel | 12 – 168 | 2.0 – 16 | ≥ 450 | ≥ 620 | ≤ 100 |
Petrochemical Industry
High-pressure transfer pipelines, heat exchanger tube bundles, and reactor piping
Food & Beverage
Milk transfer lines, beverage filling systems, and CIP cleaning pipelines
Medical & Pharmaceutical
Water-for-injection lines and GMP clean piping systems
Marine & Offshore
Seawater cooling systems, deck piping, and ballast water systems
Architecture & Decoration
Curtain wall structures, handrails, and municipal water systems
Power & Nuclear Energy
Boiler superheater tubes and nuclear power plant cooling piping systems
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