Our company customize the production of various types of heat exchange tubes, for details, please send a mail consultation.
In addition to the light tube, a variety of heat transfer tubes, such as fin tubes, thread tubes and
spiral grooves, can also be used in the heat exchanger. When the heat coefficient varies greatly on
both sides of the diameter of the tube, the fin of the fin tube should be arranged on the side of the
low heat supply coefficient.
The common materials are carbon steel, low alloy steel, stainless steel, copper, copper nickel alloy,
aluminum alloy, titanium and so on. In addition, there are some nonmetallic materials, such as
graphite, ceramics, polytetrafluoroethylene, etc. Appropriate materials should be selected according
to the working pressure, temperature and medium corrosiveness.
The commonly used dimensions of the heat exchanger tubes (outer diameter x wall thickness) are
mainly the seamless steel tubes of 19mmx2mm, 25mmx2.5mm and 38mmx2.5mm, and the stainless
steel tubes with the diameter of 25mmx2mm and 38mmx2.5mm. The standard length of 1.5, 2, 3, 4.5,
6, 9.0m. By using small tube diameter, the heat transfer area of unit volume can be increased, the
structure is compact, the metal consumption is reduced, and the heat transfer coefficient is
increased. It is estimated that the heat transfer tube of the same diameter heat exchanger is changed
from 25mm to 19mm, and the heat transfer area can be increased by about 40%, and more than 20%
of the metal is saved. But the flow resistance of the small pipe is large, it is inconvenient to clean,
and it is easy to clog. Generally large diameter pipes are used for viscous or dirty fluid, and small
diameter pipes are used for cleaner fluids.