The butt-weld may be examined by radiography or ultrasonic inspection. Usually, the butt-welds are subject to visual, surface, or volumetric examinations, or a combination thereof, depending on the requirements of the code of construction for piping or a component. There is, therefore, a high degree of reliability in the integrity of the weld. A butt-weld also has good fatigue performance, and its presence does not induce high local stresses in the pipework.
|Raised Face Socket Weld Flange|
|Raised Face Slip-On Weld Flange|
|Composite Lap Joint Flange|
|Swivel Ring Flange|
stresses at the center, they can be safely permitted to be stressed more than other types of flanges.