Long seam defects are specific types of flaws that can occur in Electric Resistance Welded (ERW) pipes, which are commonly used in the oil and gas industry.
Here is a break down of the types of defects:
- This defect occurs when the weld metal does not properly fuse with the base metal, creating weak spots in the weld seam.
Inclusions
- These are foreign materials (like slag or oxides) that get trapped in the weld, weakening the joint.
Cracks
- Fractures in the weld that can develop due to stress or improper welding techniques.
Undercutting
- This happens when the base metal at the edges of the weld is melted away, creating a groove that weakens the weld.
Porosity
- Small holes or cavities caused by gas trapped in the weld during solidification.
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