Double Containment Piping

LibertyCES has documented Double Containment Piping specified across 1 sector application, including Direct Lithium Extraction (DLE).

Duo-Pro is Asahi's own recommended system for DLE brine/acid handling per the ASAHI FOR DLE source; named chemistries are sodium hypochlorite, chlorine dioxide and acids (lithium-rich brine eluents). The 30-day EPA containment figure is the quotable design basis on a DLE permitting conversation. — examples include Asahi/America Duo-Pro double containment in PP, PVDF or ECTFE (1x3 through 16x20, 150psi + drainage ratings, outer pipe designed to meet the EPA standard of at least 30 days of containment, simultaneous or staggered butt fusion, leak-detection cable installable on 2x6 and larger), Asahi/America PAL-AT cable-based leak detection, LiquidWatch II electronic leak detection. This is well-documented in LibertyCES's field data.

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 to confirm: 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. Specific chemicals include 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 drain, process waste.