Introduction of 317L Stainless Seamless Steel Pipe
The 317L stainless steel seamless pipe is an ultra-low-carbon, high-molybdenum austenitic stainless steel pipe. The extremely low carbon content can prevent intergranular corrosion of the pipe during welding and solution treatment. The higher molybdenum content significantly enhances the pipe’s resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-containing media such as seawater and other saline solutions. Compared with 316L, this pipe offers better corrosion resistance and stability under high-temperature acidic conditions, such as acetic acid, sulfuric acid, and formic acid, and is widely used in pipeline projects in harsh corrosive environments, including boiler heat exchanger manufacturing, the chemical industry, seawater desalination, and paper making.
| Available Sizes | ||||||
| Products | OD | WT | Length | |||
| Inch | MM | Inch | MM | Ft max | Mt max | |
| Tube | 1/2″-3″ | 12.0-76.2 | 0.02″-0.5″ | 0.5-12.0 | 105′ | 32.00 |
| Pipe | NPS1/2″-6″ | 21.34-168.3 | Sch10-Sch80 | 2.11-12.7 | 98′ | 30.00 |
317L Stainless Steel Pipe Advantages
- Ultra-low carbon content: Prevents intergranular corrosion after welding or solution annealing treatment.
- High molybdenum content: Greatly improves resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking in chloride-containing media such as seawater and brine.
- Compared with 316L grade: Delivers superior stability under high-temperature acidic environments involving acetic acid, sulfuric acid, and formic acid.
| GRADE | C | Mn | P | S | Si | Cr | Ni | Mo |
| 317 | 0.08 | 2.0 | 0.045 | 0.03 | 1.0 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 |
| 317L | 0.035 | 2.0 | 0.045 | 0.03 | 1.0 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 |
317L Mill Test Certificates
To ensure the highest quality standards, all our 317L pipes undergo rigorous testing and certification. The Mill Test Certificates below provide detailed verification of material specifications, ensuring compliance with ASTM, ASME, and other industry standards.
Inspection of All Dimensions
Our company will conduct a comprehensive inspection of all dimensions (outer diameter, wall thickness, and length) individually before the products are shipped. We will strictly control all tolerances in accordance with the product’s execution standards to ensure that all measured values fall within the specified tolerance range. Any non-compliant products will be screened out and isolated, and will not be released for shipment. This way, we can control the product’s dimensional accuracy from the source and ensure that the dimensions of the shipped products are compliant and stable.
Typical Applications
- Chemical industry: Sulfuric acid/phosphoric acid plants, reactors, heat exchangers, bleaching equipment.
- Power and flue gas desulfurization: Boiler tubes, high-temperature pipelines.
- Marine and offshore operations: Seawater cooling pipelines, seawater desalination plants, offshore platform pipelines.
- Pulp and paper industry: bleaching equipment.
- Pharmaceutical industry: High-purity liquid transportation, aseptic processing lines.
