ASTM A312 ERW Straight Seam Welded Pipe For High Temperature Corrosive Service
Our ASTM A312 welded stainless steel pipe is manufactured using precision electric resistance welding (ERW) and solution annealing heat treatment. Designed for high-temperature and general corrosive service applications, this straight-seam welded pipe offers the same mechanical integrity as seamless pipe at a more economical cost. Available in standard grades TP304, TP304L, TP316, and TP316L, our A312 welded pipe is widely used in chemical processing, food & beverage, pharmaceutical, and power generation industries.
| Specification | Details |
|---|---|
| Standard | ASTM A312 / ASME SA312 |
| Type | Straight-Seam Welded (ERW) |
| Grades | TP304, TP304L, TP316, TP316L, TP321, TP347 |
| Size Range | 1/8″ to 24″ NPS (DN6 to DN600) |
| Schedules | Sch 5S, 10S, 40S, 80S |
| Lengths | Single Random (16-22 ft), Double Random (35-40 ft), or Custom |
| Heat Treatment | Solution Annealed & Quenched |
| Surface Finish | Mill Finish, Pickled, or Polished |
Highlights specific data for SEO for "TP316L vs 304 chemical properties."
| Grade | C (Max) | Mn (Max) | P (Max) | S (Max) | Si (Max) | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-11.0 | - |
| TP304L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-12.0 | - |
| TP316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| TP316L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| Property | TP304 / TP304L | TP316 / TP316L |
|---|---|---|
| Tensile Strength (MPa) | ≥ 515 | ≥ 485 |
| Yield Strength (MPa) | ≥ 205 | ≥ 170 |
| Elongation (%) | ≥ 35 | ≥ 35 |
| Hardness (HRB) | ≤ 90 | ≤ 90 |
Our customers rely on ASTM A312 stainless pipe for critical infrastructure:
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Chemical & Petrochemical Plants: Transporting corrosive acids and hydrocarbons.
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Food & Beverage Processing: Sanitary lines requiring cleanability and non-reactive surfaces.
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Pharmaceutical Industry: High-purity steam and fluid transfer.
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Desalination & Water Treatment: Resisting saltwater corrosion (316L).
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Heat Exchangers & Boilers: High-temperature fluid movement.
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100% Weld Joint Efficiency: Proper solution annealing and heat treatment ensure the welded seam meets base metal strength requirements, making it suitable for pressure-rated applications as defined in ASME B31.3.
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Excellent Corrosion Resistance: Austenitic structure with chromium content (16-20%) provides outstanding resistance to oxidation and general corrosive environments. TP316/L grades add molybdenum for enhanced chloride resistance.
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High-Temperature Performance: Grades with "H" designation (TP304H, TP316H) are specifically intended for service where creep and stress rupture properties are critical at elevated temperatures.
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Low-Temperature Service Capability: A312 welded pipe in TP304, TP304L, and TP347 grades is accepted by ASME Section VIII Division 1 for service temperatures as low as -425°F (-250°C) without impact testing qualification.
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Cost-Effective Alternative: Compared to seamless pipe, welded A312 offers significant cost savings (typically 30-40%) with comparable performance for most general corrosive and high-temperature applications.
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