Longitudinal Finned Tubes ASTM A179 Heat Exchanger Tubes With Carbon Steel Fins

Definition

Longitudinal finned tubes are produced by resistance welding fins along the long direction of the tube. The fins first form a U-shaped channel so that each leg of the U-shape forms a fin. The channel is cut to the appropriate length, then oriented along the length of the tube and resistance welded in place. The channels are pairs of soldered, diametrically opposed, so the number of fins specified must be a multiple of four.

Regular base pipe/tube material: carbon / alloy steel (A106, A333, A179, A335 P5, P22, P9, etc.)

stainless steel TP304, TP316L,TP321, etc.

copper alloy CuNi 70/30, CuNi 90/10, etc and other material.

Regular fins material: carbon steel, stainless steel, alloy steel, copper alloy, etc.

Detailes of ASTM A179 Base Tubes

This specification covers minimum-wall-thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus.This specification covers tubes 1⁄8 to 3 in. [3.2 to 76.2 mm], inclusive, in outside diameter.

Manufacture: tubes shall be made by the seamless process and shall be cold drawn.

Heat treatment:tubes shall be heat treated after the final cold draw pass at a temperature of 1200°F [650°C] or higher.

Surface Condition: finished tubes shall be free of scale. A slight amount of oxidation will not be considered as scale.

Tests: Flattening Test, Flaring Test, Flange Test, Hardness Test, Hydrostatic Test

Chemical Composition (%)

Mechanical Properties

Advantages

1.Improve the heat transfer efficiency in the effective space;

2.Reduce the installation space of the required heat transfer surface and at the same time, it has high reliability;

3.Heat transfer is strengthened to reduce flow resistance and metal consumption,etc.

Application

Generally applicable to power stations or large high-temperature old equipment in the oil industry:

Boilers

Furnaces

Economizaers

Combustion Heater

Big Air Cooler,etc.

Heat Exchangers,Shell and Tube Bundles

Specifications For Various Types Of Finned Tubes