High-Pressure Acid Leach (HPAL) & Slurry Pipelines
Hydrometallurgical mineral extraction and long-distance ore transport represent two of the most aggressive mechanical and chemical processing environments in heavy industry. Fluid containment systems must concurrently survive extreme erosion-corrosion from high-velocity mineral slurries (silica, nickel laterite, copper tailings), concentrated hot sulfuric acid (H2SO4), continuous hydraulic shock, thermal expansion up to 270°C, and system pressures exceeding 200 bar (3,000 PSI).
- Nickel, cobalt, gold, and lithium hydrometallurgical processing complexes
- Long-distance slurry transmission pipeline operators
- Mineral tailings management facilities (TMF)
- Autoclave vessel OEMs
- Slurry pump manufacturers
- Global mining EPC contractors
Primary Application Areas
HPAL titanium autoclave reactors, high-pressure slurry feed pumps, acid injection lines, flash vessel discharge headers, choke manifold assemblies, long-distance iron ore/copper slurry transmission pipelines, and tailings disposal lines.
Common Flange Types & Standards
Weld Neck Flanges (ASME B16.5 / B16.47 WN Class 600 to 2500)
Primary choice for severe-service, high-pressure slurry discharge lines to ensure smooth bore alignment and eliminate turbulence-induced wall erosion.
Titanium & Exotic Alloy Lap Joint Flanges (ASME B16.5 LJ)
Titanium Grade 2, Grade 7, or Hastelloy C276 stub ends paired with carbon steel backup flanges to safely handle hot acid lines at optimized material costs.
Custom Lined Pipe Flanges
Specialized flanged joints engineered to accommodate internal rubber, polyurethane, or basalt erosion-resistant linings without pinching or shearing the internal barrier.
Engineered Gasket & Sealing Selection
Exotic Alloy Ring Type Joint (RTJ) Gaskets (ASME B16.20)
Precision-machined R, RX, and BX rings in Titanium Grade 2/7, Hastelloy C276, or Super Duplex S32750 engineered for HPAL titanium autoclaves, acid injection nozzles, and high-pressure slurry isolation valves.
Erosion-Resistant Kammprofile Gaskets
Titanium or Hastelloy serrated metallic cores faced with expanded ePTFE or flexible graphite, engineered to resist internal fluid scouring and maintain joint tightness across high-vibration slurry pump manifolds.
Restructured ePTFE Sheet & Envelope Seals
Biaxially oriented ePTFE sheets resistant to full pH 0–14 acid exposure, formulated to eliminate cold-flow under cyclic thermal loading on low-to-medium pressure acid feed piping.
Heavy-Duty Cathodic Protection Flange Isolation Kits (FIK - TX ISOPRO)
High-dielectric G10/G11 Glass-Reinforced Epoxy with TX-FLEX seals to block galvanic corrosion cells between titanium/exotic vessel interfaces and steel piping, while maintaining Cathodic Protection (CP) integrity on cross-country slurry pipelines.
