Elbow is a pipe installation commonly used in connection with pipe fittings, connecting two nominal diameter of the same or different pipe, so that the pipe to make a certain angle turn, nominal pressure of 1-1.6Mpa.

Elbow is to change the direction of pipe fittings. According to the angle, there are 45掳 and 90掳180掳 three kinds of most commonly used, in addition to engineering needs also include 60掳 and other non-standard angle elbow. Elbow materials are cast iron, stainless steel, alloy steel, can be calcined cast iron, carbon steel, non-ferrous metals and plastics. The way to connect with the pipe is: direct welding (the most commonly used) flange connection, Elbow Hot melt connection, electric fusion connection, Elbow thread connection and socket type connection, etc. According to the production process can be divided into: welding elbow, stamping elbow, push elbow, casting elbow and so on. Other name: 90 degrees elbow, right angle bend, love and bend, etc.

Elbow plays a very important role in the pressure piping system, not only in the pipeline system can make a change in the direction of the pipeline, but also to increase the flexibility of the pipeline, reduce the vibration of the pipeline, reduce the role of the pipeline binding, Elbow and can play a role in the thermal expansion, Elbow so the elbow is an important part of the pressure pipeline. The elbow is the most stress in the pipeline and is thus the most vulnerable part of the pipeline. Elbow in the pipeline to change the direction of the role of the pipeline.

According to the Angle division, common has 45 degree elbow, 90 degree elbow and so on, there are some unusual angle elbow such as 60 degrees elbow, because the pipeline needs different, elbow angle is also different.

According to the classification of materials, there are cast iron, stainless steel, alloy steel, malleable iron, carbon steel, non-ferrous metals and plastics. According to the way of connection with pipe, there are direct welding, flange connection, Hot melt connection, fused connection, Elbow threaded connection and socket connection, etc.

According to the production process division, there are welding elbow, stamping elbow, push elbow, casting elbow, etc.

According to the radius of curvature, there is a long radius elbow and a short radius elbow (the long RADIUS elbow is the outer diameter of the pipe whose curvature radius is equal to 1.5 times times; Elbow the short radius elbow refers to its radius of curvature equal to the outside diameter of the pipe.)

According to the different shape uses to divide, has the card sleeve type elbow, the double bearing elbow, the flange elbow, the reducer elbow, the seat elbow, Elbow the internal and external tooth elbow, the ramming elbow, pushes the elbow, the socket elbow, to the welding elbow, the inner silk elbow and so on.

The elbow is suitable for a pipe fitting at the turning point, he can be divided into seamless elbow and straight seam elbow according to the different welding way. In the pipe system used in all the pipe fittings, seamless elbow accounted for the largest proportion. In general, Elbow different forming processes are selected for different material or wall thickness elbows. At present, the manufacturers commonly used seamless elbow forming process has hot push, stamping, extrusion and so on.

Because the elbow has a good comprehensive performance, Elbow so it is widely used in chemical, construction, water supply, drainage, petroleum, heavy industry, refrigeration, sanitation, plumbing, fire, electricity, aerospace, shipbuilding and other basic projects.

Elbow is a common connection used in plumbing installation to connect the pipe corners to change the direction of the pipe.

Other Name: 90掳 elbow, right angle bend, love and bend, stamping elbow, pressing elbow, mechanism elbow, welding elbow, etc.

Use: Connect two nominal diameter of the same or different pipe, so that the pipeline for 90掳, 45掳, 180掳 and various degrees of turning.

The bending radius is less than 1.5 times times the diameter of the pipe is the elbow, more than 1.5 times times the pipe diameter belongs to the bend pipe.

Technical Requirements

1, because most of the pipe fittings for welding, in order to improve the quality of welding, the end of the Cheng Chengpo mouth, leaving a certain angle, with a certain edge, this request is also more stringent, the side of the thickness, the angle of how much and the scope of the deviation are provided. Elbow Surface quality and mechanical properties are basically the same as pipes. For easy soldering, the fittings are the same as the steel of the pipe being connected.

2, is all the pipe fittings to undergo surface treatment, the internal and external surface of the iron oxide skin through the spray shot treatment, and then coated with anti-corrosion paint. This is for export needs, moreover, in the country is also to facilitate transport to prevent corrosion and oxidation, Elbow we have to do this work.

3, is the requirements for the packaging of small pipe fittings, such as export, you need to make wooden cases, about 1 cubic meters, stipulating that the number of elbows in this box can not be more than a ton, the standard allows the package, that is, large sets of small, but generally not more than 1 tons weight. For large y will be a single package, like 24鈥 must be a single package. The other is the packaging mark, marking is to indicate the size, steel number, lot numbers, manufacturers trademarks and so on.