TP317L Stainless Steel Pipe Tube / Seamless Pipe SCH40S SCH80S ASTM A312 Hot Rolled Steel Pipes

Key Parameters of 317L Stainless Steel Pipes

• Material Grade: TP317L (low-carbon version of 317, with carbon content ≤0.03%)
• Chemical Composition (typical, %):
  • Chromium (Cr): 18.00-20.00
  • Nickel (Ni): 11.00-15.00
  • Molybdenum (Mo): 3.00-4.00
  • Manganese (Mn): ≤2.00
  • Silicon (Si): ≤0.75
  • Phosphorus (P): ≤0.045
  • Sulfur (S): ≤0.030
  • Carbon (C): ≤0.03
• Pipe Type: Seamless (no welding seams, ensuring uniform strength)
• Schedule: SCH40S, SCH80S (standard wall thicknesses per ASME B36.19)
• Manufacturing Process: Hot-rolled (enhances mechanical properties and dimensional stability)
• Size Range: Typically available in outer diameters (OD) from 1/8" to 24", with wall thicknesses (WT) corresponding to SCH40S/SCH80S standards.
• Length: Common lengths include 6m, 12m, or customized lengths as per requirements.
• Surface Finish: Annealed and pickled (AP), polished, or as specified.

Standards Compliance of 317L Stainless Steel Pipes

• ASME B36.19 (for dimensions and schedules of stainless steel pipes)
• EN 10216-5 (European standard for seamless stainless steel pipes)

Performance Characteristics of 317L Stainless Steel Pipes

• Corrosion Resistance: Exceptional resistance to pitting, crevice corrosion, and general corrosion, especially in chloride-rich environments (superior to 304/316 due to higher molybdenum content).
• High-Temperature Resistance: Maintains strength and oxidation resistance at elevated temperatures (up to 800°C), suitable for high-heat applications.
• Mechanical Properties (typical, annealed condition):
  • Tensile Strength: ≥485 MPa
  • Yield Strength: ≥170 MPa
  • Elongation: ≥40%
• Formability & Weldability: Good weldability using common methods (TIG, MIG); low carbon content minimizes carbide precipitation during welding, reducing intergranular corrosion risk.

Similar Grades of 317L Stainless Steel

• 317L (generic designation, equivalent to TP317L in pipe forms)
• EN 1.4438 (European equivalent)
• JIS SUS317L (Japanese equivalent)
• Note: 317L offers higher molybdenum than 316L, providing better corrosion resistance in aggressive environments.

Packaging of 317L Stainless Steel Pipes

• Bundled with steel straps (for small diameters)
• Wooden crates or pallets (for larger diameters or customized lengths)
• Ends capped with plastic or metal protectors to prevent damage and contamination
• Each bundle/crate is labeled with grade, size, standard, heat number, and manufacturer information.

Applications of 317L Stainless Steel Pipes

• Chemical Processing: For handling acids, alkalis, and corrosive chemicals.
• Oil & Gas: Offshore and onshore pipelines, refineries, and petrochemical plants (resistant to sour gas and saltwater).
• Pharmaceuticals & Food Processing: Sanitary piping systems requiring high purity and corrosion resistance.
• Power Generation: Boiler tubes, heat exchangers, and piping in coal-fired or nuclear power plants.
• Marine Engineering: Saltwater-resistant components in shipbuilding and offshore structures.