Elbow is divided into cold stamping and hot stamping two kinds, according to the material properties and equipment capabilities to choose hot and cold stamping, cold stamping elbow is the use of a dedicated elbow forming machine, and then put the tube billet in the external mold, the upper and lower mold after the push rod, the tube billet along the inner mold and the outer mold reserved gap movement to form a elbow, this elbow shape beautiful thickness uniformity.
The quality of the elbow is very light, compared with the steel pipe is only one-tenth, because the elbow quality is light, so the transport overhead of the elbow is greatly reduced, also reduced the installation of the construction strength, elbow material from the production of carbon hydrogen two elements of the composition did not add other toxic heavy metals, so the use of elbow is very safe, elbow heat-resistant performance is very good, elbow unique strength performance and other real wall tube has a very good improvement, elbow insulation performance is good, the use of a long time, In normal use, the elbow is used for up to 50 years.
