What to do if the flange pipe fittings are welded crookedly?

When the flange pipe fittings are welded crookedly, you can use special tools, pads or adjust the welding method to straighten them. The specific method to choose depends on the material, size and welding environment of the pipe flange.

In the process of welding flanges, flange pipe fittings may be welded crooked due to various reasons. This not only affects the appearance, but also may affect the safe operation of the equipment. So, what can be used to pad the crooked flange pipe fittings? Here are some common methods.

1. Use special tools to pad
For crooked flanges, special flange correction tools can be used to pad them. These tools are usually designed and made by experienced welders or engineers according to the actual situation of the flange. When using, just place the tool on the crooked part of the weld, and restore the flange to its normal position by applying appropriate pressure and adjusting the angle.

2. Use pads to pad
If there is no special flange correction tool, you can also use pads to pad it. The pad can be made of metal or rubber, and the specific choice depends on the material and working environment of the flange. Place the pad on the crooked part of the weld, and adjust the height and position of the pad to gradually restore the flange to normal. It should be noted that the thickness and size of the gasket should be selected according to the actual situation of the flange to ensure the correct effect.

3. Adjust the welding method
In addition to using tools and gaskets, the welding method can also be adjusted to prevent flange welding from being distorted. Before welding, the position and angle of the flange should be carefully checked to ensure that they are in the correct state. At the same time, the appropriate welding process and parameters should be selected according to the material and size of the flange to ensure the welding quality. During the welding process, a stable welding speed and temperature should be maintained to avoid excessive deformation or stress.

How to deal with the distorted welding of flanges and heads?

1. Preventive measures: Before welding, ensure that the surface of the flange and head is smooth and free of oil, rust or other impurities. Select appropriate welding materials and processes, and perform correct preheating and temperature control.
2. Correction: If the flange and head have been distorted, you can try to use hot rolling or mechanical pressure to correct them. For small skewness, you can use a hammer and pliers to tap or adjust it gently. Then use welding to connect them again.
3. Cut and redo: If the skew is large or cannot be corrected, you can choose to re-cut and redo the welding. This method may produce some waste, but it can ensure the quality and precision of the welded joint.

Notes:

When performing flange gasketing, you need to pay attention to the following points:

First, make sure that the gasketing operation will not cause further damage or deformation to the flange. Therefore, during the operation, control the force and angle to avoid excessive force or improper operation.
Secondly, after the gasketing is completed, carefully check the welding part to ensure that the flange has completely returned to its normal position and there are no residual deformation or cracks.
Finally, if the flange is seriously skewed or cannot be gasketed by simple methods, it is recommended to seek the help of professional welders or engineers to ensure that the problem is properly resolved.

In short, the skew of flange pipe fittings is not an unsolvable problem. By choosing the appropriate gasketing method and paying attention to the details of the operation, we can easily gasket the skewed flange to ensure the normal operation and safe production of the equipment.

Read more: Pipe flange production process or Pipe elbow and flange welding connection