The difference between flat welding flanges and butt welding flanges!
Release time:
2021-05-06
What is the difference between flat welding flanges and butt welding flanges? Today, let's learn about it together!
What is the difference between flat welding flanges and butt welding flanges? Today, let's learn about it together!
Various typesExport flangeFeatures:
1. Socket welding flanges are suitable for small diameter, high voltage, and high temperature pipelines.
2. Flat welding, like butt welding, has a boss, with a groove opened on the boss, and then the pipe is inserted for welding.
3. Socket welding does not have a boss; a groove is directly opened on the flange body, similar to opening a hole on a blind flange, and then a groove is opened.
4. Flat welding is slightly better than socket welding.
During resistance welding, the two workpieces are always under pressure. When the end face temperature reaches the welding temperature Tω, the distance between the end faces of the two workpieces decreases to a few angstroms, and the atomic interactions between the end faces create common grains at the joint, thus forming the weld. There are two welding cycles in resistance welding: isostatic and forging enhancement. The former has a simple pressure mechanism and is easy to implement. However, employing the electric top forging process can yield better welding quality. To ensure the plastic deformation of the alloy butt welds and further enhance the joint quality, the electric top forging process should be adopted.
When performing resistance butt welding on export flanges, the two workpieces should have the same end face shape and size to ensure that the heating deformation of the workpieces is consistent with the plastic deformation. The end faces of the workpieces, as well as the surfaces in contact with the chuck, must be strictly cleaned. Oxides and dirt on the ends will directly affect the quality of the seam. The oxide scale and dirt on the surface of the workpieces in contact with the clamps will increase the contact resistance, exacerbate the wear of the workpiece surface at the jaws, and increase power loss.
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