How to Select the Right Titanium Tube Grade and Specification Based on Working Conditions?

When choosing titanium tubes for applications in chemical processing, seawater systems, or power generation, it is essential to match the tube grade and dimensions to the specific working conditions such as corrosive medium, temperature, pressure, and installation environment. Here are the key selection guidelines:

1. Select Material Grade Based on Corrosive Media:

   • Grade 2 (Commercially Pure Titanium): Suitable for most mild acids, seawater, and moist chlorine gas; cost-effective.

   • Grade 12: Alloyed with molybdenum and nickel, offering enhanced corrosion resistance, ideal for hot concentrated sulfuric acid or reducing media.

2. Determine Material Stability by Temperature Range:

   • Grade 2 is typically used in ambient to medium-temperature conditions (≤300°C).

   • For higher temperatures or thermal cycling, consider Grade 7 or other titanium alloys.

3. Select Wall Thickness Based on Operating Pressure:

   • Low-pressure systems: 0.5–1.0mm wall thickness is sufficient.

   • High-pressure systems: Choose thicker walls (≥1.5mm) for mechanical strength.

4. Decide Length and Outer Diameter Based on Equipment Layout:

   • Common OD range: 6–60mm.

   • Lengths can be customized up to 18 meters to reduce weld joints and improve heat exchange efficiency.

5. Consider Surface Treatments like Vacuum Annealing or Polishing:

   • Applications in chemical or pharmaceutical industries may require polished internal/external surfaces to prevent contamination and fouling.

6. Ensure Compliance with Standards (e.g., ASTM B338):

   • Clarify if international standards apply to meet project quality requirements and facilitate global sourcing.

By aligning titanium tube specifications with actual operating conditions, users can ensure long-term reliability, corrosion resistance, and cost-efficiency in demanding industrial environments.