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Pickled stainless steel pipe
1. Fully annealed and pickled to remove mill scale and restore corrosion resistance. Surface is clean with a uniform satin finish. Free from surface oil or impurities.
2. Widely used in heat exchangers, condensers, and chemical pipelines, or as semi-finished material for subsequent polishing or coating.
3. Available as seamless or welded tubes. Outer diameter range: 12–2032 mm. Wall thickness range: 1.5–60 mm. Tube ends sealed. Export-grade packaging. Includes factory inspection certificate.
Common Materials
| Series | Grade | Description |
|---|---|---|
| 300 Series | 304, 304L, 316, 316L, 321, 347H | General industrial use, corrosion resistance restored after pickling |
| Duplex Steel | S31803, S32205, S32750 | High strength, chloride corrosion resistance |
| Heat-Resistant Steel | 310S, 309S | High-temperature oxidation environments |
| Super Austenitic | 904L | Highly corrosive environments |
Applicable Standards
| Type | Standard | Title | Application |
|---|---|---|---|
| Domestic | GB/T 12771 | Welded Stainless Steel Pipes for Fluid Conveyance | Chemical, food, pharmaceutical fluid conveyance |
| GB/T 24593 | Welded Stainless Steel Tubes for Boilers and Heat Exchangers | Heat exchangers, condensers | |
| GB/T 14976 | Seamless Stainless Steel Pipes for Fluid Conveyance | Reference standard for seamless pipes | |
| International (Standard Diameter) | ASTM A312/A312M | Standard Specification for Seamless and Welded Stainless Steel Pipes | Chemical, petrochemical, food industries |
| ASTM A790 | Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe | Duplex and super duplex stainless steel pipes | |
| EN 10217-7 | Welded Steel Tubes for Pressure Purposes | European pressure equipment certification | |
| ASME BPE | Bioprocessing Equipment Standard | Pharmaceutical, biotech sanitary piping | |
| ASTM A269 | Standard Specification for Seamless and Welded Stainless Steel Tubes for General Service | General industrial applications | |
| International (Large Diameter) | ASTM A358/A358M | Standard Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe | Large diameter EFW pipes (NPS 8" and above) |