Overview
Used titanium tower sections are repurposed segments of industrial towers originally fabricated from titanium alloys. These components are salvaged from decommissioned or retrofitted systems in sectors like chemical processing, offshore oil platforms, and power generation. Their reuse offers significant cost savings compared to new fabrication while retaining titanium's inherent benefits, such as resistance to chlorides, acids, and seawater corrosion. Titanium's biocompatibility and non-magnetic properties further expand their suitability for specialized applications, including pharmaceutical manufacturing and marine environments. The secondary market for these sections has grown due to increased sustainability efforts and the high initial cost of virgin titanium components.
Structure and Working Principle
Tower sections are cylindrical or conical segments designed to stack vertically, forming distillation columns, scrubbers, or reactors. They typically feature flanged connections, internal trays (sieve, valve, or bubble cap), and reinforcement rings for structural integrity. Used sections may retain original internals or be sold as empty shells for retrofitting. In service, these sections withstand internal pressures, thermal cycling, and corrosive media. Titanium's passive oxide layer naturally reforms when damaged, ensuring ongoing protection. Buyers should assess remaining wall thickness via ultrasonic testing, especially in areas exposed to abrasive or high-velocity fluids during prior use.
Key Features
Corrosion resistance is the standout feature, with titanium outperforming stainless steel in chloride-rich environments like offshore platforms or bleach manufacturing. Grades like Gr2 (commercially pure) resist reducing acids, while Gr5 (Ti-6Al-4V) offers higher strength for pressurized systems. Lightweight construction reduces shipping and installation costs—titanium towers weigh about 40% less than steel equivalents. Thermal conductivity is low, minimizing heat loss in process columns. However, this necessitates careful design to avoid overheating in exothermic reactions. Surface finishes (e.g., pickled, passivated) should be verified to ensure contamination-free operation in sensitive processes.
Application Areas
Primary applications include chemical processing (chlor-alkali plants, nitric acid production), where titanium resists pitting and stress corrosion cracking. Petrochemical refineries use them for crude distillation overhead systems handling hydrogen sulfide and chlorides. Desalination plants employ titanium sections in multi-stage flash (MSF) evaporators due to seawater compatibility. Power generation applications include flue gas desulfurization (FGD) scrubbers. Secondary markets include food processing (citric acid, brewing) and pulp/paper bleaching systems, where material purity prevents product contamination.
Maintenance and Precautions
Inspections should focus on weld zones, crevice corrosion under gaskets, and erosion at inlet nozzles. Hydrotesting at 1.5x design pressure verifies integrity, though titanium's fatigue life requires evaluation if cyclic loading occurred. Cleaning avoids abrasive methods that damage the oxide layer; chemical pickling with nitric-hydrofluoric acid solutions restores surface passivity. Storage recommendations include indoor placement with desiccant packs to prevent moisture-induced hydride formation, which embrittles titanium. Welding repairs demand argon purging to prevent oxidation; only certified titanium welders should perform work.
B2B Procurement Guide
Procure from specialized industrial surplus dealers or directly from plant decommissioning projects. Request mill test reports (MTRs) from original fabrication to confirm alloy grade and traceability. Third-party inspection services can assess dimensions, thickness mapping, and nondestructive testing (PT, RT, UT) results. Pricing factors include remaining service life (typically 10-30 years for well-maintained units), diameter/thickness specifications, and inclusion of ancillary parts like manways or instrumentation ports. Logistics planning is critical—oversized sections may require modular disassembly or specialized transport. Contracts should specify liability for latent defects discovered post-installation.
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