Tubing used for heat exchanger service may be either
welded or seamless. The welded tube is rolled into cylindrical shape
from strip material and welded automatically under precisely
controlled manufacturing conditions.
A seamless tube may be extruded or hot pierced and
drawn. Both are high quality products. Alloys are available
only as seamless products, whereas most commercial metals are offered
in both welded and seamless.
Tube size is specified by outside diameter and wall
thickness. Almost all heat exchanger tubes range between a 3/8 inch
and a 2 inch outside diameter. Most
