Does the inner surface of a plate-type butt weld flange also need to be welded?
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Does the inner surface of a plate-type butt weld flange also need to be welded? Between the end of the pipe that is inserted into the flange and the inner wall of the flange bore
Yes, the inner surface of the plate-type butt weld flange also needs to be welded. When using plate flat-face welding flanges to connect pipes, the pipes are inserted into the inner wall of the flange, and this joint needs to be welded to ensure a strong and airtight connection. Welding can be done using different methods, such as manual welding or automatic welding. By welding the inner edges, pipes and flanges can be effectively connected to form a single unit, thereby preventing leaks and loosening. .
Welding is generally required, but it also needs to be determined based on process conditions, the medium, etc.
Is the previous image the flange type you were referring to? This is the standard connection method.
In practice, most of them aren’t welded; I’ve never seen any construction team do that. Workers just want it to be easy – who’s going to weld this for you?
Welding is necessary, and there are also requirements regarding the distance between the weld toes and the flange surface
Welding is required for all of them; generally, TIG welding is used for the interior
Similar to 6L, theoretically welding is required on both the inside and outside, but in actual construction it is not welded at all