Warm sulfuric acid (15-19%, 100☏, 38☌) is pumped through these tubes at 75 psi (5 bar) to dissolve the alloy.
The machine shop uses special titanium tubes with an insulated coating for creating these holes. This tight tolerance work is more of a "guided machining" process rather than actual drilling. The hole follows a curved path and can reach "depths" of 18 inches (46 cm). Acid Reclamation Saves Costs for Precision MachiningĪ precision machine shop specializing in STEM (Shaped Tubular Electro Machining) manufacturing used for "drilling" high tolerance holes that conform to curved profiles.
SCID AND PUMP FULL
Manifolds ports are socket welded with full penetrate welds on all weld neck flanges and elbows. This custom feature is available in stainless and alloy D10, H25, and D35 acid pumps from Wanner Engineering. Due to the corrosive nature of the process solutions, the end user required the acid pumps be fitted with ANSI flanged connections for the inlet and outlet ports. Hastelloy and Viton XT were selected for the sulfuric acid, and stainless steel acid pumps fitted with EPDM were selected for the sodium hydroxide. Hydra-Cell acid pumps were installed to adjust the pH levels of the process fluid by dosing in acid or caustic as required. Hydra Cell D10 size acid pumps with variable speed drives would handle the required flow rate of 4-6 GPM (15-23 l./min). A large electronics manufacturer was having pump problems with their acid regeneration system when they had inconsistent performance and premature failure of their chemical feed pumps.
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