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The welding process of stainless steel elbows is also very complicated, and the quality will not meet the requirements if you do not pay attention to it. So what are the quality inspection methods for stainless steel elbow welding?
The quality inspection method of stainless steel elbow welding is as follows:
Detects slag, small openings, and fine holes that are hard to see with the naked eye. Nowadays, X-ray (also called Roentgen ray) is generally chosen to monitor problems.
A more direct and rough method, however, a magnifying glass of five to twenty times can be used to detect defects on the surface of the elbow, and measurement tools can also be used to assist in detecting other indicators.
3.Mechanical performance test of elbow
Non-destructive testing can find defects in the weld, but it cannot explain the mechanical properties of the metal in the heat-affected zone of the weld. Sometimes it is necessary to perform tensile, impact, and bending tests on the welded joint.
4.Water pressure test and air pressure test
For pressure vessels that need to be sealed, a water pressure test and/or an air pressure test must be carried out to check the sealing and pressure bearing capacity of the weld.
The method is to inject clean water or gas equivalent to the working pressure (mainly air) 1.25 to 1.5 times the working pressure of the container, stay for a period of time, then observe the pressure drop in the container, and observe the external leakage phenomenon, which can be assessed Whether the weld is qualified.