Serrated finned tube for heat exchanger

Description

Serrated finned tube is a type of heat exchanger that is designed to enhance the heat transfer rate by increasing the surface area of the tube.

Serrated Finned Tube is a high-frequency welding production process with high-frequency patented technology. Using high-frequency power supply as a heat source, the steel strip and steel pipe are heated at the same time, so that they can be welded together. It has the characteristics of long life, wide temperature range and high pressure tolerance.

The serrations are small grooves or notches that are cut into the fin surface, which disrupt the boundary layer and increase the turbulence of the fluid flowing over the fins. This increased turbulence enhances the convective heat transfer between the tube and the fluid, resulting in a more efficient heat exchanger. Serrated finned tubes are commonly used in applications where high thermal performance is required, such as in boilers, air-cooled condensers, and other heat exchangers.

Manufacturing Process

Serrated Finned Tube use high-frequency welding production process, using high-frequency power source as heat source, to heat steel strip and steel pipe at the same time, so that they can be welded together into one

U-bends with longitudinal fins and fin coils are available on request.

Longitudinal fin types: one piece, standard U-bend, cut and twisted, perforated, etc…

The fin channels are welded to the tube in pairs. The fin height, number of fins, and fin thickness can be specified.

Fins can be used for OD pipe or NB pipe.

Delivery conditions

The tube ends are square cut without burrs, the inside is dry and blown clean, and the ends of the L-shaped tension wound finned tube are coated with varnish on the outside.

Acceptance Criteria

API Standard 661 (Air-Cooled Heat Exchangers for General Refinery Service) or Delivery Conditions (TDC).

Features of Serrated Finned Tube

Simple and economical installation. The maximum length of the sawtooth high-frequency welded spiral finned tube can reach 16 meters, which reduces the number of connection points, makes the installation more economical and quicker, and reduces the probability of water leakage at the connection.

1. Easy to maintain. After the serrated high-frequency welded spiral fin tube is installed, it is basically maintenance-free.
2. High-efficiency, sawtooth high-frequency welding spiral finned tube is full contact welding of fin and steel tube winding, the heat dissipation area is more than 8 times that of the light tube, the interior is smoother, and the internal water flow resistance is small.
3. Long service life, high mechanical strength of fins and pipes, tensile strength of more than 200Mpa, and hot-dip galvanizing treatment inside and outside the pipes.

Application

Serrated Finned Tube is a new, wear-resistant and high-efficiency heat-exchange material. It is a high-efficiency and energy-saving heat-exchange element. It is widely used in waste heat recovery, petrochemical, power station boilers, economizers, passenger cars, industrial and civil building heating and refrigeration. , Medicine drying, wood drying, grain drying systems and other industries.