Continuous seawater exposure makes chloride pitting and biofouling the defining concerns, and classification society approval (DNV, ABS, Lloyd's) adds a documentation layer beyond standard ASME/TEMA.
| Dominant Failure Mode | Chloride pitting, erosion-corrosion, biofouling |
| Governing Standard | Classification society approval (DNV, ABS, Lloyd's Register) |
| Typical Material Default | Copper-Nickel 90/10 or 70/30, Titanium Grade 2 |
| Typical Structural Type | Fixed or Floating, depending on vessel design |
Continuous seawater service drives material selection toward the marine-proven alloy families.
We can supply material with the documentation needed to support classification society approval; confirm the specific society (DNV, ABS, Lloyd's, etc.) and requirement at enquiry stage, since approval processes vary.
Titanium is roughly 44% lighter and offers superior corrosion resistance, which matters for offshore weight-sensitive applications or the most demanding seawater conditions — copper-nickel remains more economical for standard duty.
Both — material choice (copper alloys have some inherent antifouling property) helps, but biofouling is also managed operationally through flow velocity and cleaning schedules, which is a design consideration beyond material selection alone.
Every enquiry is checked against governing code, material compatibility and manufacturing feasibility before a quote is issued. Use our product, material, grade and standards guides to freeze the RFQ — then confirm with engineering.
Send your fluid service, pressure class and governing standard — we'll confirm the right product and material.