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Chemical Compatibility

Storage Tank — Oxidizers/Disinfectants

Strong evidence

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Named chemicals

Sodium HypochloriteHydrogen Peroxide

What LibertyCES's vendor documentation shows

Poly Processing caps on-site hypochlorite generation (0.8%) at 4,000 gallons without engineering review; hinged-weighted manway vents at 0.25psi for H2O2 decomposition.

Materials documented for this service

  • EPDM (fails per Ace Roto-Mold: flat 'N')
  • 316SS (fails: flat 'N')
  • dedicated resin #880059 (Snyder)

Products cited for this service

Snyder Vertical/Horizontal/Chemical Feed Station tanksAce Roto-Mold Vertical TanksPeabody ProChem (hinged-weighted manway for H2O2)

Real Specifications

Sodium hypochlorite — EPDM/316SS resistance ratingEPDM rated flat 'N' (Not Resistant) and 316 stainless steel rated flat 'N' at 12%, 16.5%, and >16.5% concentrationsace-roto-mold-application-guidelines.md
Sodium hypochlorite — Santoprene ratingSantoprene rated 'R' (Resistant) across all tested concentrationsace-roto-mold-application-guidelines.md
Sodium hypochlorite dedicated resinOpaque white UV-block-out resin #880059, available up to 12,500 gallonssnyder-industries-tanks.md
Sodium hypochlorite max concentration/SPGRated to 12.5% concentration, 1.5 specific gravity (1.9 preferred by some customers as an added corrosion barrier)peabody-general-catalog.md
Hydrogen peroxide max concentration/SPGRated to 50% concentration, 1.9 specific gravity; welded PE fittings preferred over flanged/coupling connectionspeabody-general-catalog.md
Hinged-weighted manway relief pressureOpens at 0.25 psi to vent pressure buildup during rapid H2O2 decompositionpoly-processing-fittings-accessories.md
Install / Failure Note

Sodium hypochlorite degrades from UV exposure and dissolved transition-metal buildup over time; a hinged-weighted manway (opens at 0.25 psi) is the standard mitigation for hydrogen peroxide's own decomposition-driven pressure buildup — fitting a standard threaded lid instead of the hinged-weighted design on H2O2 service removes the intended pressure-relief path.

EPDM is one of the most common general-purpose tank gaskets in the industry, and it rates a flat 'N' — Not Resistant — for sodium hypochlorite at every concentration Ace Roto-Mold tested. Specifying it here isn't a minor mismatch, it's a gasket that will fail; James Riggins treats sodium hypochlorite tanks as a materials-first spec — dedicated resin, non-EPDM elastomer — rather than a generic poly tank with a generic gasket.

Every material and product claim on this page traces to real, vendor-published documentation on file with LibertyCES. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.

FAQ

Is Storage Tank compatible with Oxidizers/Disinfectants?

Poly Processing caps on-site hypochlorite generation (0.8%) at 4,000 gallons without engineering review; hinged-weighted manway vents at 0.25psi for H2O2 decomposition. This is strong evidence.

What materials are documented for Storage Tank in Oxidizers/Disinfectants service?

Materials documented for this service: EPDM (fails per Ace Roto-Mold: flat 'N'), 316SS (fails: flat 'N'), dedicated resin #880059 (Snyder). Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm with a spec review before final specification.

What specific Oxidizers/Disinfectants chemicals does this cover?

Named chemicals in this documentation: Sodium Hypochlorite, Hydrogen Peroxide.

What products are cited for Storage Tank in Oxidizers/Disinfectants service?

Documented examples include Snyder Vertical/Horizontal/Chemical Feed Station tanks, Ace Roto-Mold Vertical Tanks, Peabody ProChem (hinged-weighted manway for H2O2).

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