L Finned Tube

Description

L finned tube is a heat exchange element. By adding L-shaped fins on the surface of the heat exchange tube, the surface area is increased, which significantly improves the heat exchange efficiency.
In the specific structure, it uses high-frequency welding or integral rolling process to plastically press the metal sheet on the base tube to form a seamless L-shaped fin, eliminating thermal resistance and ensuring uniform heat transfer.

Technical Specifications ‌
‌ Material Standards ‌: It must be made of high-quality carbon steel or stainless steel, and the chemical composition and mechanical properties must meet ASTM national standards to ensure corrosion resistance and high strength.
‌ Dimension Tolerance ‌: The pipe diameter deviation is controlled at ±0.5%, the wall thickness is ±0.3%, the fin spacing is ±0.5mm, and the fin height is ±0.5mm to ensure assembly accuracy.
‌ Welding Requirements ‌: The welded joint is firm and free of defects (such as cracks or pores), the weld strength is not lower than the parent material, and the surface is smooth and free of oxide scale.
‌Working parameters‌: Adaptable temperature range -40°C to 550°C, design wind speed 1.5-3m/s (evaporator) or 2-3m/s (condenser), superheat 5-10°C.
‌Bending specification‌: Full length bending ≤±1mm/m, maximum bending ≤±3mm/m, avoid stress concentration.

L Fin Tube for Heat Exchanger Specification

Tube diameter size: Φ5mm to Φ114mm
Wall thickness and length: Wall thickness 0.8-8.0mm, length can be customized to 12m
Fin parameters: Fin height 10-25mm, spacing 3-8mm,
Layout: Supports two or three rows of arrangement along the airflow to meet space constraints.

L Fin Tube features

‌Efficient heat transfer‌: The fins greatly increase the surface area (the fin ratio is 15-20 times), the contact thermal resistance is close to zero, and rapid heat conduction is achieved.
‌Stable structure‌: The L-shaped fins fit tightly with the base tube, have strong thermal shock resistance, and resist deformation at high temperatures.
‌Corrosion resistance‌: Through material selection (such as stainless steel or steel-aluminum composite) and surface treatment (such as mirror polishing), it can resist acid, alkali or chloride ion corrosion.
‌Low maintenance design‌: The surface is smooth (Ra≤0.8μm), not easy to scale, and easy to clean mechanically.
‌Energy-saving adaptability‌: Passive fluid turbulence design reduces energy consumption by 30-40%, suitable for waste heat recovery.

L Finned Tube Applications

Petrochemical industry‌: Used in crude oil heaters, cracking reactor heat exchange units, and handle high-temperature corrosive media.
‌Electric power energy‌: Improve waste heat recovery efficiency in economizers or air preheaters of thermal power and nuclear power boilers.
‌Building HVAC‌: Heating systems for industrial plants and greenhouses, providing large-capacity heat dissipation.
‌Food and pharmaceuticals‌: Sterilization equipment or pure steam generators to meet sanitary sterility requirements.
‌Environmental protection engineering‌: Heat recovery for sewage treatment or air conditioning dehumidification systems to optimize energy utilization