What are the quality requirements for the surface of manual weld seams?
2024-10-25
The surface quality requirements for manual welds are a key aspect to ensure the safety, reliability, and aesthetics of welded structures. Below is a detailed explanation of the surface quality requirements for manual welds:
1. Weld Appearance
1. The weld should be flat and uniform, without defects such as cracks, lack of fusion, lack of penetration, porosity, or slag inclusions.
2. The weld should transition smoothly with the base material, without abrupt changes.
3. There should be no undercutting on the weld surface, and the depth of undercutting should not exceed 5% of the base material thickness.
2. Weld Shape
1. The weld bead should be uniform, without overheating or burn-through.
2. The weld beads should be parallel to each other, with uniform spacing, maintaining a certain width and depth.
3. The outline of the weld should be clear, without any blurriness.
3. Weld Size Accuracy
1. The weld should meet design requirements, and its dimensional tolerances should be within acceptable limits.
2. The height, width, and reinforcement of the weld should comply with relevant standards.
4. Surface Cleanliness
1. The surface of the weld should be clean, free from oil stains, rust spots, and other contaminants.
2. After welding, spatter, slag, and other impurities should be promptly cleaned.
5. Other Requirements
1. During the welding process, heat input should be strictly controlled to avoid excessive heat-affected zones.
2. For welds with higher requirements, visual inspection and non-destructive testing should be conducted to ensure welding quality.
3. Safety should be prioritized during the welding process, and relevant safety operating procedures should be followed.
4. Welders should hold the appropriate welding certificates to ensure they possess the necessary welding skills.
5. Welding processes should adhere to relevant standards and specifications to ensure the standardization and normalization of the welding process.
In summary, the requirements for the surface quality of manual welds are multifaceted, including weld appearance, weld shape, weld size accuracy, and surface cleanliness. These requirements aim to ensure the safety, reliability, and aesthetics of welded structures. In practice, welders should strictly adhere to relevant standards and continuously improve their welding skills to ensure that the surface quality of manual welds meets the requirements.
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