LibertyCES Data › Engineering Rules › Saltwater Vs Seawater 316ss Divergence

Saltwater Vs Seawater 316ss Divergence

Direct answer: Flowline's chart rates sea water Excellent across PVC, PP, PVDF, PFA, PTFE, and 316SS at both 40C and 80C, but rates saturated salt water Fair on 316SS at both temperatures while all thermoplastics stay Excellent. Two media that read as near-synonyms on a datasheet behave differently against stainless - a real, counter-intuitive distinction worth checking explicitly rather than assuming 'salt water' and 'sea water' share one compatibility profile.

Confidence: confirmed

Applies when	sea water, seawater, salt water, saltwater, brine, saturated salt water
Avoid	undefined (undefined)
Recommend instead	()
Rationale	Flowline's chart rates sea water Excellent across PVC, PP, PVDF, PFA, PTFE, and 316SS at both 40C and 80C, but rates saturated salt water Fair on 316SS at both temperatures while all thermoplastics stay Excellent. Two media that read as near-synonyms on a datasheet behave differently against stainless - a real, counter-intuitive distinction worth checking explicitly rather than assuming 'salt water' and 'sea water' share one compatibility profile.
Confidence	confirmed
Source	data/reference/nuance-appendix.md (nuance 69), data/reference/flowline-chemical-compatibility.csv

This is a general engineering rule derived from real field/case-study evidence, not a substitute for a project-specific specification review — confirm against your exact process conditions before ordering equipment.

Reviewed by James Riggins, Founder, LibertyCES — 30+ years specifying industrial fluid-handling equipment for the exact failure modes this rule addresses. Request a free spec review →

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Frequently Asked Questions

When does this rule apply?

sea water, seawater, salt water, saltwater, brine, saturated salt water

Why?

Flowline's chart rates sea water Excellent across PVC, PP, PVDF, PFA, PTFE, and 316SS at both 40C and 80C, but rates saturated salt water Fair on 316SS at both temperatures while all thermoplastics stay Excellent. Two media that read as near-synonyms on a datasheet behave differently against stainless - a real, counter-intuitive distinction worth checking explicitly rather than assuming 'salt water' and 'sea water' share one compatibility profile.

What does LibertyCES recommend instead?

()

Source: Liberty Chemical Equipment & Supply, Inc. (LibertyCES) — engineering data compiled and reviewed by James Riggins, Founder, LibertyCES, from real vendor and field-verified sources. For a free spec review, call James at (559) 395-5500 or email [email protected] / [email protected]. Website: libertyces.com.