Chemical Compatibility

Double Containment Piping — Metal Plating & Photographic Process Solutions

Strong evidence

Named chemicals

chromic acid 30-37%sulfuric acid 35%sodium cyanide 7-9%sodium hydroxide 2%cadmium oxide 3%sodium carbonate 6%nickel sulfate 25%spent solvent drainprocess waste

What LibertyCES's vendor documentation shows

The strongest plating-bath evidence in the corpus, and real field data rather than a compatibility table. Four UTC Goodrich Cleveland installations from 2013 are documented: 30-37% chromic acid with 35% sulfuric acid; a 7-9% sodium cyanide + 2% sodium hydroxide + 3% cadmium oxide + 6% sodium carbonate mixture; 25% nickel sulfate; and contaminated groundwater remediation. That cyanide/cadmium/caustic/carbonate mixture is an actual plating-bath waste stream, confirming Chem Prolok double-wall containment for the cyanide-bearing waste itself rather than only the treatment instrumentation. Broader pattern: of the 26 documented installations at least 9 explicitly replaced failed or leaking PVC or CPVC.

Materials documented for this service

Advanced PE PE445584C / PAS 1075
PP, PVDF, ECTFE (Duo-Pro)
Simultaneous butt fusion only for double-wall (primary + secondary fused in one operation)
Explicit vendor installation rule: threaded joints should not be allowed

Products cited for this service

Asahi/America Chem Prolok double wall (1"x3" through 12"x16"; primary SDR rated 150psi @68°F; secondary SDR11 rated 150psi or SDR33 rated 45psi @68°F; PE445584C resin, PAS 1075)Asahi/America Poly-Flo double wall (1"x1-1/2", 2"x3", 4"x6"; secondary SDR17 rated 90psi @68°F)Asahi/America Duo-Pro (PP, PVDF or ECTFE, 1x3 through 16x20, outer pipe designed to meet the EPA standard of at least 30 days of containment)Asahi/America PAL-AT cable-based and LiquidWatch II electronic leak detectionReal installations at UTC Goodrich, Cleveland OH, 2013

Sourced to

data/vendor-sources/asahi-america-advanced-pe-piping.md

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

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