Corrosion Resistant Welded Steel Tube Annealed Pickled Finish For Food Applications
The Corrosion-Resistant Welded Steel Tube is manufactured from high-quality stainless steel coils, formed into a cylindrical or rectangular shape, and longitudinally welded using advanced TIG (GTAW) or laser welding technologies. Designed for environments where moisture, chemicals, or atmospheric exposure would degrade ordinary carbon steel, this tube provides excellent resistance to rust, pitting, and oxidation. It offers a cost-effective solution for applications requiring durability, cleanliness, and long service life with minimal maintenance.
| Parameter | Details |
|---|---|
| Standards | ASTM A554, A269, A312; EN 10217-7; JIS G3446 |
| Available Grades | 304, 304L, 316, 316L, 201, Duplex 2205 |
| Shapes | Round, Square, Rectangular |
| Outer Diameter (Round) | 6 mm – 219 mm (1/4″ – 8″) |
| Square Sizes | 10 mm * 10 mm – 150 mm * 150 mm |
| Rectangular Sizes | 20 mm * 10 mm – 200 mm * 100 mm |
| Wall Thickness | 0.5 mm – 6.0 mm |
| Length | 3m, 6m, or custom lengths upon request |
| Welding Process | TIG (GTAW), Laser, or ERW |
| Heat Treatment | Annealed after welding (standard) |
| Surface Finish | Mill finish, pickled, brushed, or polished |
| Grade | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| 304 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | – |
| 304L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | – |
| 316 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 316L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 201 | 0.15 | 0.75 | 5.5-7.5 | 0.045 | 0.030 | 16.0-18.0 | 3.5-5.5 | – |
Molybdenum grades (316/316L) provide enhanced resistance to chlorides and acidic environments.
| Grade | Tensile Strength (MPa) min | Yield Strength (MPa) min | Elongation (%) min | Hardness (HB) max |
|---|---|---|---|---|
| 304 | 515 | 205 | 35 | 201 |
| 304L | 485 | 170 | 35 | 201 |
| 316 | 515 | 205 | 35 | 217 |
| 316L | 485 | 170 | 35 | 217 |
| 201 | 515 | 275 | 35 | 241 |
Tested in accordance with ASTM E8 / E8M.
| Environment | 304 / 304L | 316 / 316L | 201 |
|---|---|---|---|
| Atmospheric (rural) | Excellent | Excellent | Good |
| Atmospheric (industrial) | Good | Excellent | Fair |
| Atmospheric (coastal/marine) | Fair | Excellent | Poor |
| Fresh Water | Excellent | Excellent | Good |
| Potable Water | Excellent | Excellent | Good |
| Wastewater | Good | Excellent | Fair |
| Dilute Acids | Good | Excellent | Fair |
| Alkalis / Caustics | Excellent | Excellent | Good |
| Chloride Solutions | Limited | Good | Poor |
| High Temperature Oxidation | Good (up to 870°C) | Good (up to 870°C) | Limited |
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Superior Corrosion Resistance – Outperforms carbon steel, galvanized, and coated tubes
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No Protective Coating Required – Inherent corrosion resistance eliminates painting
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Long Service Life – Decades of performance in corrosive environments
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Low Maintenance – Easy to clean; no rust removal or repainting
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High Temperature Resistance – Retains strength and oxidation resistance up to 870°C (1600°F)
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Excellent Weldability – Can be welded without loss of corrosion resistance (L grades)
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Hygienic Surface – Non-porous, easy to sanitize
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100% Recyclable – Environmentally sustainable
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Potable water distribution
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Hot and cold water lines
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Solar water heating systems
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Swimming pool piping
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Dairy and brewery process lines
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Edible oil transfer
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Beverage dispensing systems
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Sanitary utility piping
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Chilled water lines
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Condenser water piping
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Refrigerant lines
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Steam distribution (low pressure)
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Handrails and balustrades
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Furniture frames
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Display racks and fixtures
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Decorative trim
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Compressed air lines
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Cooling water systems
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Chemical transfer (mild)
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Washdown stations
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Boat railings (316 grade)
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Dock and marina structures
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Coastal building components
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Irrigation systems
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Livestock watering lines
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Greenhouse structures
| Material | Corrosion Resistance | Initial Cost | Maintenance Cost | Service Life |
|---|---|---|---|---|
| Stainless Steel (304/316) | Excellent | Higher | Very Low | 30-50+ years |
| Carbon Steel + Paint | Poor (if coating fails) | Low | High | 5-15 years |
| Galvanized Steel | Fair | Medium | Medium | 10-20 years |
| Copper | Good | High | Low | 30+ years |
| PVC / Plastic | Excellent | Low | Very Low | 20-30 years |
Stainless steel offers the best life-cycle cost for many applications due to eliminated coating and reduced replacement frequency.
| Finish | Description | Best For |
|---|---|---|
| Mill Finish | As-welded, oxide scale present | Industrial / concealed applications |
| Pickled | Acid-cleaned, removes scale | Maximum corrosion resistance |
| Brushed / Satin | 180-320 grit directional grain | Architectural and visible applications |
| Polished | 400-600 grit, semi-reflective | Food processing, decorative |
| Bead Blasted | Matte, uniform texture | Architectural, anti-glare surfaces |
For inquiries, technical datasheets, or custom sizes, please contact our sales team.
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