Product Overview – ASTM A312 TP304L Welded Pipes
ASTM A312 TP304L is the low carbon version of 304 stainless steel. The reduced carbon content (maximum 0.03%) minimizes chromium carbide precipitation during welding, preventing corrosion at grain boundaries.
TP304L welded pipes are manufactured by forming stainless steel strip into cylindrical sections and welding longitudinally using TIG or laser welding methods. These pipes are ideal for applications requiring heavy welding and fabrication.
SS 304L welded pipes are widely used in chemical processing, pharmaceutical plants, food industries, and structural fabrication projects.
Standard & International Identification - ASTM A312 TP304L Welded Pipes
ASTM A312 TP304L Welded Pipe Specifications
| Manufacturing Type : | Welded / ERW |
| Available Sizes: | 1/8″ NB to 36″ NB |
| Schedules: | 5S, 10S, 40S, 80S |
| Length: | 6m, 12m, Custom Length |
| Finish: | Annealed & Pickled / Polished |
| End Type: | Plain End (PE), Beveled End (BE), Threaded |
| Testing : | Hydrostatic, Weld Seam Testing, PMI |
| Certification : | EN 10204 3.1 / 3.2 MTC |
| Dimensional compliance: | ASME B36.19M. |
All specifications are in accordance of ASTM A312 / ASME SA312 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition of ASTM A312 TP304L Welded Pipe
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C) | 0.03% |
| Manganese (Mn) | 2.00 % |
| Silicon (Si) | 1.00 % |
| Phosphorus (P) | 0.045 % |
| Sulfur (S) | 0.030 % |
| Chromium (Cr) | 18.0 – 20.0% |
| Nickel (Ni) | 8.0 – 11.0% |
| Iron (Fe) | Balance |
Note: Lower carbon content improves corrosion resistance after welding.
Mechanical Properties of TP304L Welded Pipes
| Property | Minimum Value |
|---|---|
| Tensile Strength | ≥ 485 MPa |
| Yield Strength | ≥ 170 MPa |
| Elongation | ≥ 35% |
SS 304L offers slightly lower strength than 304 but improved weld performance.
Corrosion Resistance & Performance ASTM A312 TP304L Welded Pipes
SS 304 welded pipes offer:
For welded structures exposed to corrosive environments, 304L is preferred over 304.
Applications of ASTM A312 TP304L Welded Pipes
- 🔸Chemical processing pipelines
- 🔸Pharmaceutical plants
- 🔸Food & beverage industry
- 🔸Dairy processing units
- 🔸Structural fabrication
- 🔸Water treatment systems
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