They are visually invisible since they are not present on the surface, but they carry equal weight as the external ones. Internal Welding Defects are defects that occur at some depth in the material.We will discuss each one of them in the next section. They include surface cracks, overlaps, undercuts, porosity, and spatter. External Welding Defects – are also known as surface of visual defects because they manifest themselves on the surface itself.those that occur internally and those that occur externally. Having said that, this guideline will help you to detect these common welding defects, their causes and remedies.ĭefects in welding joints are classified into 2 broad categories. It is important to note that some of the defects are permitted if they do not compromise set standards and quality, but some like cracks cannot be accepted. Although it is almost impossible to create a defect-free weld, it is important for you to reduce their occurrence to prevent loss of material and maintain the intended quality. Welding defects can occur at any stage of the welding process and they can affect both the inside and outside of the metal structure. The deviation can be caused by process limitation in terms of wrong welding process/technique or due to certain human behavior.
Welding defect can be defined as any deviation in size and shape of the given metal structure regarding technical and design requirements.
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