| Applies when | sulfuric acid piping, h2so4 piping, 95% sulfuric acid, concentrated sulfuric acid pipe, ectfe piping, halar piping |
|---|---|
| Avoid | PVDF pipe above 95%, Chem Proline PE above 95%, PVC/FKM pipe for concentrated acid (Piping) |
| Recommend instead | Asahi/America Ultra Proline (ECTFE/Halar) single wall, or DuoPro (Halar x polypropylene double wall) for double containment (Piping) |
| Rationale | Extends the existing sulfuric-acid-98plus-material-selection rule (Griffco source, valve/fitting materials) into piping specifically, from a second independent vendor. Asahi/America's own South Florida RO plant case study (2012) did NOT use its flagship Chem Proline Advanced PE piping for sulfuric acid the way it did for every other chemical on that job — it specifically stepped up to Ultra Proline (ECTFE/Halar) single wall plus DuoPro (Halar x polypropylene) double wall for containment. This is a real, vendor-self-selected material-tier escalation, not a third-party guess, and it independently converges with Griffco's own H2SO4 98%+ material ceiling (PVDF/Noryl fail above 98.3% from SO3 attack; Halar/ECTFE rated to 100% @ 200F). Asahi's general Advanced PE resistance table caps H2SO4 at 85% with a PVC/FKM valve pairing, with two real field installs documented at 93% — above the vendor's own stated ceiling, flag honestly when citing those. Directly relevant to hydrometallurgical leach-circuit piping upstream of dilution, where concentrated H2SO4 (93-98%) is handled in bulk storage and the reagent train. |
| Confidence | confirmed |
| Source | data/vendor-sources/asahi-america-mining.md, data/vendor-sources/asahi-america-advanced-pe-piping.md |
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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sulfuric acid piping, h2so4 piping, 95% sulfuric acid, concentrated sulfuric acid pipe, ectfe piping, halar piping
Extends the existing sulfuric-acid-98plus-material-selection rule (Griffco source, valve/fitting materials) into piping specifically, from a second independent vendor. Asahi/America's own South Florida RO plant case study (2012) did NOT use its flagship Chem Proline Advanced PE piping for sulfuric acid the way it did for every other chemical on that job — it specifically stepped up to Ultra Proline (ECTFE/Halar) single wall plus DuoPro (Halar x polypropylene) double wall for containment. This is a real, vendor-self-selected material-tier escalation, not a third-party guess, and it independently converges with Griffco's own H2SO4 98%+ material ceiling (PVDF/Noryl fail above 98.3% from SO3 attack; Halar/ECTFE rated to 100% @ 200F). Asahi's general Advanced PE resistance table caps H2SO4 at 85% with a PVC/FKM valve pairing, with two real field installs documented at 93% — above the vendor's own stated ceiling, flag honestly when citing those. Directly relevant to hydrometallurgical leach-circuit piping upstream of dilution, where concentrated H2SO4 (93-98%) is handled in bulk storage and the reagent train.
Asahi/America Ultra Proline (ECTFE/Halar) single wall, or DuoPro (Halar x polypropylene double wall) for double containment (Piping)
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.