904L Stainless Steel Pipe
904L Stainless Steel Pipe is a high-performance alloy featuring an advanced combination of nickel, chromium, and molybdenum, offering excellent resistance to corrosion, high strength, and outstanding durability in a wide variety of industrial applications. The low carbon content and high alloy content make it ideal for use in aggressive environments, ensuring reliability and longevity.
- Product Introduction
904L Stainless Steel Pipe is the gold standard for industries battling aggressive media-concentrated sulfuric acid, chlorides, and seawater. With a unique alloy blend (23% nickel, 20% chromium, 6% molybdenum, and 1.5% copper), it outperforms 316L in chemical resistance while maintaining weldability. Designed for offshore oil rigs, pharmaceutical reactors, and desalination plants, it's the go-to choice when failure isn't an option.
Why 904L Stands Apart
Acid Resistance Redefined
Handles 50% sulfuric acid at 60°C (316L fails at 25% concentration).
Saltwater Immunity
Zero pitting after 1.000h in ASTM G48 Method A (10% FeCl₃).
Low-Carbon Hero
0.02% max carbon content prevents sensitization during welding.
Bio-Safe
Passes ASTM A270 for hygienic tubing in vaccine production.
Critical Applications
| Industry | Use Cases | Performance Milestone |
|---|---|---|
| Oil & Gas | Subsea umbilicals, sour gas pipelines | Survived 15+ years in North Sea platforms |
| Pharma | Bioreactor jackets, CIP systems | Complies with FDA 21 CFR §211.65 |
| Desalination | Reverse osmosis pipework | 0 leaks in Saudi Arabia's 500.000 m³/day plant |
| Chemical Processing | Sulfuric acid concentrators | Reduced downtime by 70% vs. Hastelloy C276 |
Certified Excellence
Material Certs: EN 1.4539. UNS N08904. ASME SB677.
Testing: Intergranular corrosion (ASTM A262 Practice E), PMI reports.
Sustainability: 45% recycled content | ISO 14064 carbon footprint tracking.
Client Testimonials
Houston Offshore Engineering: "904L pipes cut maintenance costs by 50% on our Gulf of Mexico rig."
Barcelona Pharma Lab: "Zero contamination risks in high-purity fluid transfer."
Chilean Mining Corp.: "Replaced titanium with 904L for acid leaching-ROI in 18 months."
Technical Support & FAQs
Q: Can 904L replace nickel alloys like Inconel?
A: Yes for non-oxidizing acids (e.g., H₂SO₄, H₃PO₄), but consult us for nitric acid applications.
Q: Maximum operating temperature?
A: 400°C continuous (500°C intermittent) with proper insulation.
Q: Surface finish options?
A: Electropolished (Ra ≤0.3μm) for pharma | Pickled for industrial.
Q: Lead time for custom bends?
A: 2–3 weeks for radii ≥3x pipe diameter.
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