The role of an off-track bend is to change the diameter of the pipe when making a 90-degree turn. The function is the same as the size head, but the size head cannot be used for steering. The price is about twice that of the equal-diameter elbow.In some construction sites, a bend is welded together with a small head to replace the product. Its material has carbon steel, stainless steel, alloy steel, PVC, cast steel and so on.

Carbon steel elbow is a metal pipe fitting that changes the direction of the pipe on carbon steel pipe.The connection is made by wire fastening and welding. Points according to the Angle 45 ° and 90 ° 180 ° three most commonly used, according to the requirements of the project also includes 60 °, and other abnormal Angle bend. The bending materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metal and plastics. The pipe is connected by direct welding (most commonly used) flange connection, hot-melt connection, electric welding connection, threaded connection and socket connection.

As a variety of elbow type alloy elbow bend is referred to, is used to bend pipe connections, is connected to two of the same nominal diameter tube, and make the line do turn 90 ° or other angles.It has a variety of materials, alloy elbow is very versatile. Common bronze alloy elbow is more common in general tap water pipes, but with the improvement of living standard, many tap water pipes have changed to stainless steel elbow.

Stamping and welding elbow, it is to adopt the same material as the pipe material sheet metal with the stamping die half into a circular elbow, then two half - ring elbow group welding forming. Due to the different welding standards of various kinds of pipelines, fixed semi-finished products are usually delivered by group welding. The on-site construction is carried out according to the grade of pipeline weld.

The socket elbow is a kind of high pressure elbow pipe connection fitting which is mainly formed by forging blank of round steel or ingot mould and then shaped by lathe machine.It is a kind of pipe fittings for forging socket series.

The main difference between stainless steel elbow and carbon steel elbow is the material. The chemical composition of stainless steel elbow will keep its surface from rust and corrosion for a long time. In a pipe system, a bend is a pipe fitting that changes the direction of the pipe. Points according to the Angle 45 ° and 90 ° 180 ° three most commonly used, according to the requirements of the project also includes 60 °, and other abnormal Angle bend.