What are the relevant matters of bend welding?

Pipe bend has the same function as pipe elbow. But their bending radius are different. The radius of bend is larger than 1.5D, and could be 2D bends, 2.5D bends, 3D bends, 4D bends, 5D bends, and 10D bends.There are the relevant matters of bend welding:

1.When welding bends, ensure that they are wet:

In fact,the wetting process of the bend is to diffuse the melted solder around the base metal with the force of the capillary,and form a small concave convex crystal,and then attach it to the surface of the base metal to be welded,so as to ensure the sufficient contact between the solder and the base metal,and play the role of atomic gravity.

The bend is also required in the humid conditions and environment. The cleaning of the surface of the base metal to be welded is very important. No pollutants or oxides are allowed. These are the necessary conditions to ensure the welding of the base metal. Therefore, we should pay more attention to the welding process, not to be careless.

Heat induction bends with FBE coating

Heat induction bends with FBE coating

2.During welding, the bend is diffused:

Due to the continuous wetting of the elbow, there will be mutual diffusion between the solder and the base metal. Normally, the lattice points are in the state of thermal vibration. At that time, when the temperature is rising, the activity of the atoms will also increase, so as to ensure that the melted solder and the base metal are closer.

Haihao Factory Produce 180 Degree Bends For Petro Pipeline

Haihao Factory Produce 180 Degree Bends For Petro Pipeline

3.Metallurgical combination during bend welding:

Because the solder and base metal of the bend are in the state of mutual diffusion, and the intermediate layer will be formed between the two metals. In fact, it is the compound of the metal that we often call, so the solder joints obtained are also relatively good, so the metal chemicals must also appear between the welded base metal and the solder.

 

As a professional supplier of pipe fitting, we have more than 30 years of experience in this industry.  If you have any problem, please contact us.Email:sales@haihaogroup.com

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