ASTM A358 CL1 TP316 / TP316L Stainless Steel Welded Pipe For Petrochemical Industry 100% RT
ASTM A358 CL1 TP316/316L is a high-performance EFW austenitic stainless steel pipe, double-welded with filler metal and 100% radiographed, intended for high-temperature and general corrosive service. The "TP316/316L" designation indicates a dual-grade material that meets the chemical requirements of both 316 (standard molybdenum-bearing grade) and 316L (low-carbon version). These stainless steel pipes are manufactured from rolled plates or sheets using an automatic welding process without the use of filler metal (Class 1) or with filler metal (other classes), followed by heat treatment and rigorous nondestructive testing. YUHONG GROUP specializes in ASTM A358 / ASME SA358 TP304, TP304L, TP316, TP316L, TP321, TP321H stainless steel ERW pipes for more than 30 years. Our pipes have been exported to 80 countries up to now. They are widely applied in petrochemical industry, boiler, heat exchanger, water treatment, pulp and paper industry, and so on.
Surface Finish: Most ASTM A358 TP316/316L stainless steel pipes are supplied with a pickled and passivated surface after heat treatment to remove weld scale and enhance corrosion resistance. For high-purity applications (food, pharma), mechanical polishing (e.g., 180-grit, 320-grit, or mirror finish) is available upon request.
Chemical Composition(%):
| Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
| TP316 |
0.08 max |
2.0 max |
1.0 max |
0.045 max |
0.030 max |
16.00 - 18.00 |
2.00 - 3.00 |
11.00 - 14.00 |
67.845 min |
| TP316L |
0.035 max |
2.0 max |
1.0 max |
0.045 max |
0.030 max |
16.00 - 18.00 |
2.00 - 3.00 |
10.00 - 14.00 |
68.89 min |
Mechanical Properties Table (ASTM A358 TP316/316L):
| Material |
Tensile Strength |
Yield Strength |
Heat |
Temperure |
Elongation %, Min |
| Ksi (MPa), Min. |
Ksi (MPa), Min. |
Treatment |
º F(º C) Min. |
| ASTM A358 TP316 |
75(515) |
30(205) |
Solution |
1900(1040) |
35 |
| ASTM A358 TP316L |
70(485) |
25(170) |
Solution |
1900(1040) |
35 |
Key Advantages and Features:
- Dual-Grade Versatility: The material meets both 316 and 316L standards, offering the high strength of 316 and the superior weldability and intergranular corrosion resistance of 316L (due to low carbon).
- Large Diameter Capability: Can be manufactured in diameters exceeding 24 inches.
- Corrosion Resistance: Excellent resistance to pitting and crevice corrosion in chloride environments due to the 2-3% Molybdenum content. Superior to 304/304L in marine and chemical environments.
- Weld Integrity: EFW process combined with 100% radiography (for CL1) ensures a homogeneous, defect-free weld seam.
- High Temperature Strength: Retains good mechanical properties at elevated temperatures (up to ~1500°F / 816°C) for intermittent service.
Different Applications:
1. Oil & Gas Industry:
Offshore platforms (topsides piping, fire water lines).
Sour gas service (resistant to sulfide stress cracking).
Crude oil transmission lines.
2. Chemical & Petrochemical Processing:
Handling of organic acids, acetic acid, and chloride-bearing media.
Reactor lines and heat exchanger shells.
3. Pulp & Paper Industry:
Digester lines and bleaching systems (where chloride corrosion is severe).
4. Water Treatment:
High-purity water systems.
Desalination plants (reverse osmosis and brine handling).
5. Power Generation:
Nuclear power (Class 1, 2, and 3 piping).
Thermal power plant flue gas desulfurization systems.
6. Pharmaceutical & Food Processing:
Where smooth interiors (polished finishes) are required for sanitary standards and resistance to cleaning agents.
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