Which inspection method is commonly used for welds in boilermaking?

Radiographic inspection, often referred to as X-ray inspection, is a widely recognized method for inspecting welds in boilermaking due to its ability to provide a comprehensive view of the internal integrity of the welds. This technique involves using X-ray or gamma ray radiation to penetrate the weld. The radiation is captured on film or a digital detector, providing a visual representation of the weld’s internal structure.

This method is particularly valuable because it can identify various defects such as cracks, inclusions, voids, and other flaws that may not be visible to the naked eye. Since welds are critical for the safety and performance of pressure vessels and boilers, employing a method that can effectively reveal subsurface defects is essential.

In contrast, while visual inspection is a straightforward and cost-effective method, it is limited to surface defects and may miss significant internal issues. Magnetic particle inspection is effective for detecting surface and near-surface discontinuities in ferromagnetic materials but is not suitable for all types of welding defects. Ultrasonic inspection is another method used for inspections, employing sound waves to detect internal defects. While it is a reliable method, it requires a level of skill and interpretation to analyze the results.

Radiographic inspection's ability to provide a detailed internal view makes