Welds can be tested by destructive and non-destructive techniques. Most production is tested by use of non-destructive methods. The most common non-destructive tests to check welds are visual inspection, liquid penetrant, magnetic particle, eddy current, ultrasonic, acoustic emission and radiography.
How to Test a Weld?
Weld testing is an essential component of the welding process, ensuring the quality and safety of items that have been welded together. As such, it is important for welders to understand the various forms of weld testing and how to properly carry out each test. This article will provide an overview of the most common weld tests, including visual inspection, mechanical testing, ultrasonic testing, radiographic testing and hydrostatic testing, as well as outlining the steps that a welder should take when testing a weld.
Visual Inspection: One of the most basic forms of weld testing is a visual inspection. This involves looking at the welded joint using the naked eye to check for signs of defects, such as cracks, porosity, or inadequate weld penetration. Visual inspection is a relatively quick and easy way to detect welding defects, and is a good starting point for weld testing.
Mechanical Testing: Mechanical testing involves applying a force to the welded joint to check for its strength and integrity. This form of testing can be done by hand or with automated machinery, and is required for items such as pressure vessels. The most common tests are tensile tests, which measure the maximum tensile strength of the welded joint, and bend tests, which measure the ability