ASTM A358 TP 316L stainless steel Electric Fusion Welded (EFW) pipe is a widely used material in various industries due to its exceptional corrosion resistance, high-temperature strength, and versatility. The ASTM A358 specification covers seamless and welded austenitic stainless steel pipes intended for high-temperature and general corrosive service. The "TP" in ASTM A358 TP 316L stands for "Type," indicating that the material is an austenitic stainless steel. "316L" refers to the grade of stainless steel, where "316" is the standard molybdenum-bearing grade, and "L" denotes the low carbon content of the material, enhancing its corrosion resistance. This composition makes TP 316L suitable for applications involving aggressive environments, such as chemical processing, pharmaceuticals, and marine environments.
The term "Electric Fusion Welded" (EFW) highlights the manufacturing process of the pipe. EFW pipes are produced by fusion welding, where the edges of the stainless steel plate or coil are heated and fused together, forming a continuous pipe without the need for additional filler material. This process ensures a strong and seamless connection. ASTM A358 TP 316L EFW pipes offer several advantages, including ease of fabrication, cost-effectiveness, and excellent corrosion resistance even in chloride-rich environments. These pipes are commonly used in industries such as petrochemical, oil and gas, food processing, and water treatment. They are also employed in heat exchangers, condensers, and other applications where resistance to corrosion and high temperatures is crucial.
, ASTM A358 TP 316L stainless steel EFW pipe is a superior choice for various industrial applications due to its outstanding corrosion resistance, high-temperature strength, and ease of fabrication. Its composition and manufacturing process make it a reliable and durable option for environments where corrosion and extreme conditions are a concern.
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Specification:
| Specification | Description |
| Standard | ASTM A358/A358M |
| Material Grade | TP 316L |
| Type | Electric Fusion Welded (EFW) |
| Outer Diameter (OD) | 1/8" (10.3 mm) to 100" (2540 mm) |
| Wall Thickness | Schedule 5S to Schedule XXS (0.015" to 2.500") |
| Length | Up to 72 feet (21.9 meters) |
| End Connections | Plain End, Beveled End, Threaded |
| Heat Treatment | Solution Annealing |
| Surface Finish | Pickled, Polished, Cold Drawn |
| Corrosion Resistance | Excellent in various corrosive environments |
| Temperature Range | Suitable for high-temperature applications |
Chemical Composition of ASTM A358 TP 316L STAINLESS STEEL EFW PIPE
| Element | Composition Range (%) |
| Carbon (C) | 0.035 max |
| Silicon (Si) | 0.75 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 16.00 - 18.00 |
| Nickel (Ni) | 10.00 - 14.00 |
| Molybdenum (Mo) | 2.00 - 3.00 |
Mechanical Properties of ASTM A358 TP 316L STAINLESS STEEL EFW PIPE
| Property | Value |
| Tensile Strength | 70,000 psi (485 MPa) min |
| Yield Strength (0.2% Offset) | 25,000 psi (170 MPa) min |
| Elongation | 40% min |
| Hardness (Brinell) | 217 max |
| Hardness (Rockwell B) | 95 max |
Advantages of ASTM A358 TP 316L STAINLESS STEEL EFW PIPE
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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Applications Industry
| Pharmaceutical Equipment | Chemical Equipment |
| Sea Water Equipment | Heat Exchangers |
| Heat Exchangers | Gas Processing |
| Condensers | Specialty Chemicals |
| Pulp and Paper Industry | Pharmaceuticals |
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