This type of pipe flanges in the direction that is perpendicular to the flux of heat transfer tubes. Most often used in cooling or heat, the fluid flows through the pipe perpendicular to the heat exchanger, as shown.
This type of fin tube in a direction perpendicular to the axis of the tubular heat exchanger. Most often used for cooling or heating the fluid flowing through the heat exchanger tubes perpendicular to the picture.
This kind of pipe fin in the direction perpendicular to the central axis of the pipe heat Most often used in heat or add heat to the fluid flow is perpendicular to the pipe heat transfer as shown.