ASTM A213 TP316L Longitudinal Weding Fin Tube For Oil Coolers Refrigeration Systems

ASTM A213 TP316L Base Tube Composition

Material Specifications & Standards Base Material:

TP316L stainless steel (low-carbon variant of 316 stainless steel), offering superior corrosion resistance in acidic/chloride environments 17.

Compliance: Meets ASTM A213 for seamless ferritic/austenitic steel boiler tubes, alongside industry standards:

HG/T3181: High-frequency resistance welding for spiral finned tubes.

JB/T6512: Manufacturing technical conditions for boiler-grade finned tubes 125.

Manufacturing Process Welding Technology:

Utilizes high-frequency resistance welding (HFRW) with PLC-controlled automation.

Precision: Fin pitch resolution of 0.1 mm, weld line speed up to 35 m/min.

Cooling System: Integrated cooling pumps and electrode wheels prevent overheating during continuous operation 13.

Longitudinal Fin Integration: Fins are folded from the same base material as the tube wall (via bending/embossing), eliminating contact thermal resistance and improving heat transfer by 200–300% compared to conventional methods

A213 TP316L Longitudinal Weding Fin Tube Strength

• Structural Integrity: The longitudinal welding process creates a strong bond between the fins and the tube, enhancing the overall structural integrity of the fin tube. Proper welding techniques help prevent weaknesses that could lead to failure under pressure or thermal stresses.
• Weld Quality: The quality of the weld influences the strength of the fin tube. Poorly executed welds can introduce stress concentrations, leading to potential failure points. Non-destructive testing (NDT) methods, such as ultrasonic or radiographic testing, are often employed to ensure weld integrity.
• Thermal Expansion: Longitudinal welded fins must accommodate thermal expansion and contraction. The design and welding method should allow for some movement to prevent stress buildup.
• Pressure Resistance: These fin tubes are often designed to withstand significant internal and external pressures. The strength of the weld and the base material contribute to the overall pressure rating.
• Fatigue Resistance: Repeated thermal cycling can lead to fatigue failure. The design must consider fatigue life, particularly in high-temperature applications.
• Corrosion Resistance: Depending on the application, corrosion resistance is crucial. Coatings or corrosion-resistant materials may be used to enhance longevity and strength in corrosive environments.

ASTM A213 TP316L Longitudinal Weding Fin Tube Used For Oil Coolers and Refrigeration Systems

We are professional manufacturers of longitudinal finned tubes. The longitudinal fin tube is a device specifically designed to improve the efficiency of heat exchange and is widely used in various industrial fields, especially in heat exchangers. The longitudinal finned tube consists of a cylindrical tube body and fins uniformly welded or mechanically fixed along the long direction of the tube. Fins are usually flat or other geometric shapes to increase surface area and facilitate heat exchange. The fluid flows through the tube while exchanging heat with outside air or another fluid. The fins increase the contact area with the fluid, thereby improving the heat transfer efficiency. The longitudinal design effectively directs fluid flow, reducing dead zones and flow resistance to further improve heat exchange performance.