Difference Between Elbow And Elbow in Manufacturing Process

Elbows Supplier-GNEE

1. The elbow is relatively short compared to the elbow. R=1 to 2 times is an elbow, and any larger multiple is called an elbow.
2. Cold-bent pipes can be bent with ready-made straight pipes using a pipe bending machine. It can be completed in one go without having to do it twice. But the elbow needs to be customized by the manufacturer, and the ordering cycle is long.

3. The price of elbows is higher than that of elbows, but the cost performance is much higher than that of elbows. Untreated elbows are easy to damage, but because they are cheap, they are widely used in some projects that are not very demanding. Therefore, due to the different performance and price of elbows and elbows, you should pay attention when choosing them.
Since most of the pipe fittings are used for welding, in order to improve the welding quality of the national standard elbow, the ends are beveled and the angle is left. This requirement is also relatively strict. There are regulations on the thickness of the edge, the angle and the deviation range. The surface quality and mechanical properties are basically the same as those of pipes. For the convenience of welding, the steel grade of the pipe fittings and the pipes being connected is the same.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When connecting the stamping elbow to the pipe, pay attention to the slag inclusion during welding. Slag inclusion means that there are non-metallic slag inclusions. The main reason for this phenomenon is that the groove on the pipe or stamping elbow product is not processed correctly, or the angle is too small. This is one reason, and another reason is the current during welding. Too small, the viscosity of the slag is too high and other problems. Carbon steel elbows are not prone to corrosion, pitting, rust or wear. Stamping information classification can be divided into different varieties according to different classification standards. According to the use performance, it can be divided into microelectronic materials, optoelectronic materials, sensors, data, information, materials, biomedical materials, ecological environment data, dynamic data and alarms , using these stamping materials with different properties, are in the same category and demonstrate the use value. The basic process of carbon steel elbow is: first, weld a polygonal cross-section or multi-ring shell with both ends closed. The fan shell is filled with Under the action of medium pressure, internal pressure and internal pressure, the cross-section polygon gradually becomes circular and finally becomes a torus shell. If the same type of electrode is used for welding, preheating above 300℃ and 700℃ or slow cooling after welding is required.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. Elbows and pipes stored for a long time should be inspected regularly. The exposed processing surface must be kept clean at all times and stored neatly in a ventilated and dry place indoors. It is strictly prohibited to stack or store in the open air. Always keep the elbow dry and ventilated, keep the holder clean and tidy, and store it according to the correct storage method.
2. During installation, the elbow elbow can be directly installed on the pipeline according to the connection method, and installed according to the location of use. Under normal circumstances, it can be installed at any position in the pipeline, but it needs to be easy to operate and inspect. Note that the flow direction of the medium in the cut-off elbow should be upward from the bottom of the longitudinal valve disc, and the elbow pipe can only be installed horizontally. When installing the elbow, attention should be paid to the tightness to prevent leakage and affect the normal operation of the pipeline.
3. When using ball valves, stop valves, and gate valves in elbow elbows, they can only be fully opened or fully closed. They are not allowed to be used to adjust the flow rate to prevent the sealing surface from being eroded and accelerating wear. There is an inverted sealing device in the gate valve and the upper thread stop valve. Tightening the hand wheel position can prevent the medium from leaking from the packing.