Standards: ASTM B338, Gr.9, Gr.2 Seamless : outside diameter 12.7 to 48.3 mm with wall thicknesses from 0.5 to 4.0 mm. Delivered: in straight lengths or as U-bend tubes. We also supply Titanium complementary products for heat exchanger applications. Tubesheet, Flange, Shell, Head, Tube Coupling