Connection type
Butt weld: End to end
Socket weld: Inserted fillet weld
Bevel processing
Butt weld: The groove must be processed
Socket weld: No port processing required
Corrosion resistant
Butt weld: Excellent corrosion resistance, suitable for harsh corrosive environments
Socket weld: The corrosion resistance is average, and there may be gaps at the welding end.
Surface treatment
Butt weld: More precise surface preparation is required
Socket weld: No complicated surface treatment required
Strength
Butt weld:High strength, can reach or even exceed the strength of the pipe itself
Socket weld: Moderate strength, sufficient strength for smaller diameters
Welding complexity
Butt weld: The installation process is more complicated and requires more professional welding skills
Socket weld: Easy installation is the most basic welding skill
Cost
Butt weld: Although the material cost is relatively low, it requires more professional welding workers and requires more labor and skill costs.
Socket weld: Accessories are relatively expensive
Industry Standards
Butt weld: ASME B16.11 compliant
Socket weld: ASME B16.11 compliant
Applicable pipe diameter
Butt weld: Suitable for all diameters, more suitable for large diameter pipes
Socket weld:Only applicable to small diameter pipes ≤ DN50
Nondestructive Testing
Butt weld: Can perform radiographic (RT) and ultrasonic (UT) testing
Socket weld: Inserted fillet weld
