The ASTM A358 TP 304L Stainless Steel EFW Pipe falls under the scope of the ASTM standard, specifically addressing electric-fusion-welded pipes produced from austenitic stainless steel. The designation "TP 304L" specifies the grade, where "304L" indicates a variant with reduced carbon content compared to the standard 304 stainless steel alloy. This lower carbon composition significantly diminishes the likelihood of corrosion and sensitization during welding procedures. The manufacturing process employs Electric Fusion Welding, wherein a flat stainless steel strip undergoes heating, edge melting, and fusion through an electric current, culminating in the creation of seamless pipes.
These pipes possess wide-ranging utility across sectors such as chemicals, petrochemicals, oil and gas, and food processing due to their robust resistance to corrosion and formidable strength. The term "long" in this context alludes to pipes that are obtainable in extended lengths, catering to diverse project requisites. Nonetheless, prior to procurement and utilization, it is imperative to ensure that the selected pipes conform to industry protocols and effectively fulfill the specific prerequisites of their intended applications. These pipes are meticulously manufactured to satisfy the stringent criteria outlined by the ASTM A358 standard, underscoring their reliability and quality across various applications. The incorporation of a "304L" grade, characterized by its diminished carbon content, not only aids in curtailing corrosion vulnerabilities but also renders these pipes more amenable to welding, thereby preserving their structural integrity.
The utilization of the Electric Fusion Welding technique during production yields pipes with uniform dimensions and sleek surfaces, which not only diminishes friction but also enhances the flow of fluids within. Industries grappling with corrosive agents often opt for these pipes owing to their robust resilience against challenging environments, all the while upholding their performance standards. Further enhancing their appeal, the composition of 304L stainless steel equips these pipes with commendable mechanical attributes, rendering them suitable for deployment in scenarios marked by high pressures and temperatures. The adaptability of these pipes extends even to architectural and construction projects, where they effortlessly marry aesthetic considerations with functional necessities.
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Specification:
| Specification | Details |
| Standard | ASTM A358 |
| Grade | TP 304L |
| Material | Austenitic Stainless Steel |
| Carbon Content | Low carbon variation of 304 stainless steel |
| Welding Method | Electric Fusion Welding |
| Manufacturing Process | Heating, edge melting, electric fusion |
| Application Industries | Chemicals, Petrochemicals, Oil and Gas, Food |
| Processing, Architectural, Construction | null |
| Corrosion Resistance | Excellent resistance to corrosion |
| Strength | High strength and mechanical properties |
| Temperature Range | Suitable for both high and low temperatures |
Chemical Composition of ASTM A358 TP 304L STAINLESS STEEL EFW PIPE
| Element | Composition Range |
| Carbon (C) | 0.030% max |
| Manganese (Mn) | 2.00% max |
| Phosphorus (P) | 0.045% max |
| Sulfur (S) | 0.030% max |
| Silicon (Si) | 0.75% max |
| Chromium (Cr) | 18.00% - 20.00% |
| Nickel (Ni) | 8.00% - 13.00% |
| Nitrogen (N) | 0.10% max |
Mechanical Properties of ASTM A358 TP 304L STAINLESS STEEL EFW PIPE
| Property | Value |
| Tensile Strength | 70 ksi (485 MPa) min |
| Yield Strength (0.2% Offset) | 25 ksi (170 MPa) min |
| Elongation | 40% min |
| Hardness | 92 HRB max (Rockwell B) |
| Impact Toughness | 150 J (110 ft-lb) min |
Advantages of ASTM A358 TP 304L 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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