The common Stainless Steel Weld Elbow is actually a type of stainless steel joint. It is a commonly used connecting pipe fitting in pipeline installation. It is used to connect the bends of the pipeline and change the direction of the pipeline, so it is called an elbow. There are different angles and names according to the needs of the installation site: 90° elbow, right-angle elbow, love elbow, stamping elbow, pressed elbow, machine elbow, welding elbow, etc.

The folding bending radius is less than or equal to 1.5 times the pipe diameter and belongs to the elbow. The purpose of the pipe is to connect two pipes with the same or different nominal diameters to make the pipeline turn 90°, 45°, 180° and various degrees.

The stainless steel stamping elbow (joint) is a forming process used for mass production of seamless elbows. It has been replaced by hot pushing or other forming processes in the production of elbows of common specifications. It is still used when the product has special requirements. The stamping of the elbow uses a tube blank with the same outer diameter as the elbow, and a press is used to directly press it in the mold. However, in some specifications of elbows, the production quantity is small, the wall thickness is too thick or too thin. Before stamping, the tube blank is placed on the lower die, the inner core and the end die are loaded into the tube blank, and the upper die moves downward to start pressing. The elbow is formed by the constraint of the outer die and the support of the inner die. Stamped stainless steel elbows are divided into cold stamping and hot stamping. Cold stamping or hot stamping is usually selected according to the material properties and equipment capacity.

Compared with the hot push process, the appearance quality of stamping is not as good as the former; the outer arc of the stamped elbow is in a stretched state during forming, and there is no excess metal in other parts to compensate, so the wall thickness at the outer arc is thinned by about 10%. However, due to its suitability for single-piece production and low cost, the stamping elbow process is mostly used for the manufacture of small batches and thick-walled elbows.

In addition to stainless steel elbows, stainless steel pipe fittings (joints) also include: stainless steel tees, stainless steel crosses, stainless steel reducers, (concentric) eccentric reducers, etc., which all play an important role in pipeline installation.