Rust-Proof Guarantee. 500+ Hours Salt Spray Test. For Coastal & Outdoor Showers.
Built for the Coast, Not Just the Bathroom.
Standard 304 stainless steel fails in coastal environments. The salt in the air and chlorine in pools cause “Tea Staining” (brown rust spots) within months.
Vertex Tubes offers authentic ASTM 316/316L Marine Grade tubing reinforced with Molybdenum (Mo > 2%). Whether you are manufacturing outdoor shower columns for a Maldives resort or handrails for a luxury yacht, our tubes withstand the harshest elements without pitting or tarnishing.
The secret to rust resistance is “Mo” (Molybdenum).
Chemical Composition: We guarantee Ni > 10% and Mo > 2.0%. We provide a PMI (Positive Material Identification) report with every shipment.
Why it matters: Molybdenum creates a passive layer that specifically resists pitting corrosion caused by chlorides (salt water), which standard 304 cannot handle.
We don’t just say “rust-proof”; we prove it in the lab.
Neutral Salt Spray (NSS): Our 316L tubes pass 500+ hours without red rust.
CASS Test: For extreme conditions, we can provide Copper-Accelerated Salt Spray testing reports upon request.
Rust often starts in microscopic scratches where salt accumulates.
Smoother is Safer: Our No. 8 Super Mirror (8K) finish is not just for looks. By smoothing out the surface to a nanometer level, we leave no place for salt and moisture to hide, further extending the lifespan of the tube.
| Inspection Item | Vertex Factory Standard |
|---|---|
| Material Grade | ASTM 316 / 316L (Guaranteed Ni ≥10%, Mo ≥2.0%). |
| Salt Spray (NSS) | > 500 Hours (No Red Rust). Industry standard is often only 96h. |
| Surface Finish | No. 8 Super Mirror or 320# Marine Satin. |
| Weld Seam | 100% Penetration & Pickled (No carbon residue to start rust). |
| Pressure Test | Eddy Current Tested (For pressurized outdoor shower lines). |
316L tubes (OD 38mm / 50.8mm) for resorts and beach villas.
Chlorine-resistant tubes (OD 42.4mm) for swimming pools.
High-polish marine grade tubes (OD 25mm / 32mm) for boats.
Heat and moisture resistant tubes for sauna rooms.
A: 304 is fine for indoor bathrooms. However, within 5km of the coastline or in swimming pool areas, salt/chlorine will cause 304 to rust (tea staining) within months. 316L is an investment that prevents costly replacements and reputation damage.
A: Yes. Every batch of 316L material comes with a full MTC showing the chemical heat analysis (Heat No., Chemical Composition, Mechanical Properties). You can trace the material back to the raw steel mill (TISCO/POSCO).
A: For maximum corrosion resistance, we recommend Mirror Finish (No. 8). Rainwater washes salt off a smooth mirror surface easily. Satin (Brushed) finishes have micro-grooves that can trap salt, requiring more frequent cleaning in coastal areas.
Don’t let rust ruin your project. Specify Vertex 316L Marine Grade.
