ASTM B338 Titanium Tube

The ASTM B338 standard covers the requirements for seamless and welded titanium and Titanium Alloy tube. These titanium tube are primarily used in heat exchangers, condensers, and similar equipment where resistance to corrosion, heat, and pressure is required.

Key Points of the ASTM B338 Scope:

1. Materials: The specification includes commercially pure (CP) titanium grades (like Grades 1, 2, 3, 7, and 12) and titanium alloys (like Grades 5 and 9) used for heat exchangers and condensers.

2. Form: This standard applies to both seamless and welded titanium tubes. Seamless tubes are made through extrusion, while welded tubes are formed by welding a strip of titanium and then reworking it to achieve a seamless appearance.

3. Applications: Primarily used in heat transfer systems (heat exchangers, condensers, evaporators, etc.), especially in industries like:

   • Chemical processing
   • Power generation
   • Desalination plants
   • Aerospace

4. Dimensions and Tolerances: The standard includes specific tolerances for the outside diameter, wall thickness, and other dimensions to ensure proper fit and performance.

5. Testing: Tubes under ASTM B338 must meet various mechanical and chemical property requirements, including:

   • Tensile strength
   • Elongation
   • Flattening test
   • Flare test
   • Hydrostatic or pneumatic testing for pressure integrity

6. Surface Finish: Requirements for the surface condition are specified to ensure the tubing meets the appropriate corrosion resistance needed in the intended environment.