Tube OD: 25-73mm. Tube Thk: 3.0-6.0mm. Fin Thk: 1.5-4.0mm. Fin Pitch: 9.0-30.0mm. Fin Height: 15.0-45.0mm. Square Fins are welded on 1 steel base tubes. We call it H Fin Type Tubing. Square Fin Tube with 90 Degree Bends, Rectangular Finned Tubes with 90 Degree Bends. Max. Working Temperature: 300 �°C. Atmospheric Corrosion Resistance: OK. Mechanical Resistance: Good. Fin Material: Copper, aluminum, carbon steel, stainless steel. Base Tube materials: Any material available, such as carbon steel Tube, ASTM A179, ASTM A192, ASTM A210, stainless tube ASTM A269, ASTM A213 T5 T11 T22 304 316. PRODUCTS DESCRIPTION: Features: HFin Tube is formed on both sides of the straight channel, can achieve good blowing effect.The space is compact, theoverall weight is reduced greatly, reduce cost H type fin can flow space uitilization effectively, keep the fin area and fin is larger thanthe thickness of the fin; can choose according to need any abrasion; fins are parallel to each other and independent, no effect of helxangle, which is convenient to ash. "HTYPE Fined tube can not only improve the windward side near the stagnation point speed, increase the axial purging.can increasethe leeward surface reflux disturbance again.The velocity distribution characteristics make H finned tubes is not easy to dust.