ASME SA249 TP304L Welded Extruded Fin Tube With Aluminum Fin

1.Product Overview

ASME SA249 is a standard specification for welded austenitic stainless steel tubes for boiler, superheater, heat exchanger and condenser applications. TP304L, as a low-carbon variant of TP304 (carbon content ≤0.03%), boasts excellent intergranular corrosion resistance after welding—its core alloy composition (18.00-20.00% Cr, 8.00-12.00% Ni) endows it with superior general corrosion resistance. The "Welded Extruded Fin Tube" refers to a high-efficiency heat transfer component fabricated by first forming a welded base tube per ASME SA249, then extruding fin strips onto the outer surface via mechanical extrusion. Its defining features include the TP304L base material (ensuring corrosion resistance and post-weld stability) and the extruded fin structure (realizing tight fin-base tube bonding with low contact thermal resistance). It addresses the demand for efficient heat exchange in medium-low temperature corrosive environments, serving as a key component in chemical, food and marine heat transfer systems.

ASME SA249 TP304L Welded Extruded Fin Tube is a corrosion-resistant, high-efficiency heat transfer product tailored for medium-low temperature (≤450℃) corrosive scenarios, widely used in chemical condensers, food processing heat exchangers and marine cooling equipment.

2.Chemical Composition

3.Mechanical Properties

4.Equivalent Material of TP304L Base Tube

5.ASME SA249 TP304L Welded Extruded Fin Tube vs. Similar Products

TP304L vs. TP304 Welded Extruded Fin Tube: Both share similar general corrosion resistance and heat transfer performance, but TP304L’s low carbon content (≤0.03%) eliminates intergranular corrosion risks after welding—critical for welded heat exchanger systems in corrosive environments. TP304 (C≤0.08%) is more cost-effective but unsuitable for post-weld corrosive scenarios. TP304L also has slightly lower strength but superior weldability.

TP304L vs. TP316L Welded Extruded Fin Tube: TP316L contains 2-3% Mo, offering better resistance to chloride-induced pitting (e.g., seawater, brine) than TP304L. However, TP304L has higher thermal conductivity (~16.2W/(m·K) vs. TP316L’s ~15.1W/(m·K)) and 20-30% lower cost. TP304L fits general corrosive media (weak acids, alkalis), while TP316L suits harsh chloride environments.

6.Application of ASME SA249 TP304L Welded Extruded Fin Tube

1.Chemical & Petrochemical: Heat exchangers and condensers for corrosive process streams (e.g., acids, organics).

2.Pharmaceutical & Food Processing: Critical equipment requiring hygienic, cleanable surfaces and material purity (e.g., reactors, pasteurizers).

3.Power Generation: Auxiliary heat exchangers exposed to potentially corrosive environments (e.g., feedwater heaters, lube oil coolers).

4.Air Pollution Control: Heat recovery units handling acidic flue gas condensate (e.g., condensing economizers).