Simple ways to detect the quality of stainless steel elbow

Stainless steel elbow is a common type of pipe used to change direction in pipe construction. And because of the specificity of stainless steel elbow, so this elbow wide application, excellent performance. Of course, even if the factory’s production rate is guaranteed, some stainless steel elbows will have certain defects. Let’s explore the welding quality inspection method of stainless steel elbows together:

Visual inspection

Usually with the naked eye, sometimes with a 5-20x magnifying glass. Surface defects in welded elbows can be found by visual inspection. Such as bottom cutting, welding processes, pores, flux, surface cracks, welding depth, etc. The shape and size of rounded corners can also be measured using a rounded corner detector or template.

Testing the mechanical properties of the elbow

Non-destructive testing may reveal defects in the weld and may require tensile, impact and flexural testing of the welds.

These tests are carried out by the test team. It is best to weld the test plates to the longitudinal joints of the cylinders to ensure consistent design conditions. In actual production, the new steel weld was only tested in this area.

Hydrostatic and Barometric Testing

For pressure vessels to be sealed, a hydrostatic or barometric test is required to check the tightness of the welded joints.

The method is to inject water or gas (mainly air) at 1.25 to 1.5 times the working pressure of the vessel. After a certain time, observe the pressure drop inside the tank. Observe the external leakage phenomenon and assess the quality of the weld.

We hope that these simple methods of determining the quality of stainless steel elbows will help you. C&N Group has many years of experience in producing and testing stainless steel elbows, hoping to provide better service to new and old customers.