TP317L 3/4"x 20BWG Welding Stainless Steel Pipe ASME SA249
Product Description
TP317L Welded Stainless Steel Pipe ASME SA249 is a low-carbon austenitic stainless steel tube designed for exceptional corrosion resistance in acidic, chloride, and high-temperature environments. With dimensions of 3/4" * 20 BWG, this pipe offers superior durability and weldability, making it ideal for heat exchangers, condensers, and chemical process equipment.
Applications
- Chemical and petrochemical processing plants handling sulfuric or phosphoric acids
- Heat exchangers and evaporators in desalination and marine environments
- Pulp and paper bleaching systems
- Pharmaceutical and food processing pipelines
- Power generation and energy storage systems
Advantages
- Superior corrosion resistance compared to 316L, especially in halide and acidic media
- Excellent weldability and formability, suitable for automatic TIG and plasma welding
- High pitting and crevice corrosion resistance in chloride solutions
- Low carbon content minimizes intergranular corrosion
- Stable performance in oxidizing and reducing conditions
Material Composition (TP317L Stainless Steel)
| Element |
Content (%) |
| Chromium (Cr) |
18.0 - 20.0 |
| Nickel (Ni) |
11.0 - 15.0 |
| Molybdenum (Mo) |
3.0 - 4.0 |
| Carbon (C) |
≤ 0.03 |
| Manganese (Mn) |
≤ 2.0 |
| Silicon (Si) |
≤ 1.0 |
| Phosphorus (P) |
≤ 0.045 |
| Sulfur (S) |
≤ 0.03 |
Technical Specifications
| Parameter |
Value |
| Standard |
ASME SA249 / ASTM A249 |
| Grade |
TP317L |
| Outer Diameter |
3/4" (19.05 mm) |
| Wall Thickness |
20 BWG (0.889 mm) |
| Length |
Up to 12 meters |
| Surface Finish |
Bright annealed / polished / pickled |
| Form |
Welded stainless steel pipe |
Manufacturing Process
Raw Material Inspection → Slitting and Forming → TIG/Plasma Welding → Bright Annealing → Straightening → Pickling/Polishing → NDT (Eddy Current / Ultrasonic) → Dimensional & Visual Inspection → Marking → Packaging.
FAQ
Q: What's the difference between TP317L and TP316L?
A: TP317L contains higher molybdenum, providing enhanced resistance to acids and chlorides.
Q: Can TP317L pipes be used for seawater heat exchangers?
A: Yes, it performs better than 316L in marine and brackish water applications.
Q: Is TP317L suitable for high-temperature operation?
A: Yes, it maintains excellent strength and oxidation resistance up to 870°C.
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