ASTM A312 TP 317L ERW Pipes

ASTM A312 TP 317L ERW Pipes

ASTM A312 TP 317L ERW Pipes are high molybdenum-bearing stainless steel welded pipes engineered for highly corrosive and aggressive chemical environments. With improved resistance to pitting and crevice corrosion compared to 316L, 317L pipes are widely used in chemical processing, pulp and paper industries, marine applications, and high-temperature industrial systems.

The low carbon content in 317L enhances weldability and minimizes the risk of intergranular corrosion after welding, ensuring long-term durability and structural stability.

Specifications

Standard	ASTM A312 / ASME SA312
Grade	TP 317L
Manufacturing Process	Electric Resistance Welded (ERW)
Size Range	1/2" NB to 24" NB
Wall Thickness	Schedule 5S to Schedule 80S
Length	6 Meters Standard / Custom Length
Surface Finish	Annealed & Pickled, Polished, Matte Finish
End Type	Plain End, Beveled End, Threaded

Key Benefits

• Enhanced Pitting Resistance: Higher molybdenum content improves resistance in chloride environments.
• Excellent Chemical Resistance: Suitable for acidic and aggressive process media.
• Low Carbon Composition: Reduces carbide precipitation and weld decay.
• High Strength: Performs well under moderate to high pressure.
• Long Service Life: Lower maintenance and replacement costs.

Chemical Composition (Typical)

Element	317L (%)
Carbon	0.03 Max
Chromium	18.0 – 20.0
Nickel	11.0 – 15.0
Molybdenum	3.0 – 4.0

Applications

• Chemical Processing Plants
• Pulp & Paper Industry
• Marine Equipment
• Oil & Gas Processing
• Pollution Control Systems

Quality Testing

• Hydrostatic Testing
• Ultrasonic Testing (UT)
• Eddy Current Testing
• PMI Testing
• Dimensional Inspection

Conclusion

ASTM A312 TP 317L ERW Pipes deliver superior corrosion resistance, enhanced molybdenum performance, and excellent weldability, making them a reliable solution for highly aggressive industrial environments.