Oval Fin Tubes
Oval Fin Tubes - seamless steel tube
Spiral fin construction is a specialized technique used in the manufacturing of finned tubes for efficient heat transfer in various industrial applications.
Spiral Fin coils are used for heating, cooling and dehumidifying. In addition to water, a variety of other heating and cooling media, such as glycol and brine solutions, thermal oils, and refrigerants for DX applications, can be used.
Fins are tension-wound onto individual tubes to minimize thermal contact resistance and air-side pressure drop. The tapered fin profile maximizes fin-to-tube contact area, ensuring optimal heat transfer. Independently finned tubes accommodate free thermal movement, reducing stress caused by cyclic temperature variations. Fin material thickness typically ranges from 0.010" to 0.030", depending on alloy selection.
All coils are manufactured with 5/8″ OD or 1″ OD seamless tubes conforming to ASTM specifications. Standard wall thicknesses are 0.020″ (5/8″) and 0.035″ (1″). Heavy-wall options are available up to 0.065″ (5/8″) and 0.134″ (1″), depending on service conditions. Available tube materials include copper-nickel, aluminum, stainless steel and carbon steel.
Copper-based tubes are brazed as standard; steam heating coils utilize silver brazing when required. Stainless steel and carbon steel tubes employ welded joints. Coils with removable or box-style headers use roller-expanded tube joints. All brazers and welders are ASME-qualified personnel.
Coil casings are fabricated from heavy-gauge galvanized steel for structural strength and durability, with double flanges supplied as standard for coil stacking. Stainless steel, aluminum and other casing materials are available upon request. Airtight welded casings can be supplied for special applications.
Factory-standard testing is performed at 300 psig air-under-water. Coils with removable headers are hydrostatically tested at 150 psig. Higher design and test pressures are available for high-pressure or critical-service applications.
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