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Our 316L Stainless Steel Prefabricated Tube Blanks set the standard for corrosion resistance and high-purity applications, delivering unmatched performance in harsh chemical and marine environments. Manufactured from ASTM A270 316L stainless steel (UNS S31603), these tube blanks feature a low carbon content (≤0.03%) and enhanced molybdenum (2-3%) for superior resistance to pitting and crevice corrosion.
Superior Corrosion Resistance: Passivates quickly in chloride environments, with a corrosion rate ≤0.01mm/year in 3.5% NaCl solution, outperforming 304 stainless steel by 3x.
High-Purity Finish: Electropolished to Ra ≤0.2μm (internally) and Ra ≤0.4μm (externally), meeting USP <788> and ISO 14644-1 Class 8 cleanliness standards for pharmaceutical use.
Dimensional Precision: Cold-drawn to achieve OD tolerances of ±0.1% and wall thickness uniformity within ±0.05mm, ensuring leak-free orbital welding for critical systems.
Temperature Stability: Maintains mechanical properties from cryogenic (-196°C) to high-temperature (600°C) environments, with a thermal expansion coefficient of 16.0x10⁻⁶/°C.
Pharmaceutical Processing: Used in pure water systems, API manufacturing, and bioreactor pipelines, ensuring compliance with ASME BPE and cGMP requirements.
Marine Engineering: Ideal for seawater desalination plants, offshore platform piping, and shipboard condensate systems, resisting chloride-induced stress corrosion cracking.
Chemical Processing: Forms pipelines for transporting sulfuric acid, sodium hydroxide, and organic solvents in refineries and petrochemical plants, with NACE MR0175 compliance available.
Q: What is the difference between 316 and 316L grades?
A: 316L has a lower carbon content (≤0.03%) to prevent carbide precipitation during welding, making it more suitable for sensitized environments.
Q: Can these tube blanks be heat-treated?
A: Solution annealing (1050-1100°C, water quenched) is standard to optimize corrosion resistance; no age-hardening heat treatment is applicable for austenitic stainless steels.
Q: Do you provide mill test certificates (MTC)?
A: Yes, each batch includes a third-party MTC detailing chemical composition, mechanical properties, and non-destructive test results (PMI, UT, ET).
