Comparison for socket welding, butt welding, and threaded fittings
| Socket welded pipe fittings: | pipeline components that are connected through socket welding. |
| Butt welded pipe fittings: | pipeline fittings connected by butt welding, and their core feature is the direct butt welding connection between fittings and pipes, or between fittings and fittings. The weld seam usually requires groove processing to ensure welding quality. |
| Threaded fittings: | also known as threaded fittings, are fittings that connect pipes by tightening threads. |
Difference comparison
|
feature |
Socket welding fittings |
Welded pipe fittings |
Threaded pipe fittings |
|
Connection principle |
Peripheral corner welding after pipeline insertion |
Pipeline and pipe fitting groove butt welding |
By threading |
|
Strength and fatigue resistance |
Moderate, stress concentration |
Highest, continuous structure |
Lowest, prone to failure at the thread |
|
sealing performance |
excellent |
excellent |
Generally, relying on sealing materials |
|
Detachability |
non-removable |
non-removable |
detachable |
|
Installation convenience |
Relatively simple (easy to align) |
More complex (requires precise alignment) |
The simplest |
|
Non-destructive testing |
Difficulty (unable to RT) |
Easy (RT/UT compatible) |
Not applicable |
|
Applicable caliber |
Small caliber (≤ DN50) |
full-caliber |
small caliber |
|
cost |
High cost of pipe fittings and low installation cost |
Low cost of pipe fittings, high installation/testing costs |
Lowest comprehensive cost |
End
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