The advantages of different kinds tubes as following:

1.SSAW/SAWH steel tubes:
Characteristics and advantage of spiral welded pipe (SAWH) is large (~ ф ф 2500 mm 2500 mm) in diameter and long length (up to 80 m ~ 100 m), suitable for urban water, heating, ventilation, water conservancy and other large engineering, port piling works, primary area gas transmission project, general steel grade X70 or less as well, not always in pursuit of fine welding technology.
The spiral welded pipe market space is relatively broad.

2.ERW/HFW steel tubes:
Electric resistance welded steel tubes /High frequency straight seam welded pipe (HFW) characteristics and the advantage is due to the medium frequency heat treatment can eliminate the residual stress and refine grain of weld area, high dimensional accuracy, suitable for gas transmission trunk, city gas pipeline, oil pipeline, slurry pipeline, and a variety of tube for the livelihood of the people. HFW finishing area often don't match, process arrangement.

Characteristics and advantage of this pipes is big (ф 1422) or less in diameter, wall thickness (50 mm) or less and high grade (X100 and X120 measures how), as long distance natural gas trunk line, Marine pipeline and pipe of maritime structures.

Buyers canchoice the most valuable type of steel tubes according to your own demand.