What is butt welding?
Butt welding is a general term for welding processes and joint forms, specifically referring to the method of connecting two workpieces (usually the end faces of pipes, plates, or profiles) by butt welding along the same plane or axis, and welding them at the joint to fuse them into one.
core features
1.Joint form: The workpiece is in a butt joint relationship, and the weld seam is filled in the butt joint. This is the reason why it is named.
2.Groove preparation: To ensure welding penetration (especially for thick plates/thick walled pipes), the edges to be welded are often machined into specific shapes, such as V-shaped, U-shaped, X-shaped, etc., collectively referred to as "grooves".
3.Permanent connection: The weld metal is fused with the base metal to form a metallurgical bond, with high strength and usually non removable.
4.Application objective: To pursue mechanical and sealing properties that are equivalent or similar to those of the base material.
Typical application scenarios
1. Pipeline engineering (most typical)
2. Pressure vessel and structural manufacturing
3. Long material docking
The special importance of butt welding in pipeline systems
|
Comparison item |
Welding connection |
Socket welding connection |
threaded connection |
|
connection form |
End to end, with beveled edges |
Pipe insertion fitting socket |
Thread engagement |
|
Weld seam position |
Joint seam |
Fillet weld (outer wall of pipe and end of pipe fitting hole) |
No weld seam |
|
intensity |
Highest, uniform stress distribution |
High, but with stress concentration |
lower |
|
sealing performance |
very good |
good |
Generally, relying on sealing materials |
|
Flow resistance |
Minimum, smooth inner wall |
There are steps, increasing flow resistance |
Discontinuous flow channel, high resistance |
|
Application level |
High pressure, high temperature, highly toxic, flammable and other harsh working conditions |
Small caliber high-pressure pipeline |
Low pressure, small-diameter auxiliary pipeline |
Summary
Butt welding is a welding method that forms a high-strength, high integrity permanent connection by fusing the end faces of the workpiece.
We are able to provide high quality Butt Welding pipe fittings according to customers' needs and look forward to your purchase.
