What are the technical requirements and influencing factors for steel bends

Steel bends are produced step-by-step to become finished products. Throughout the production process, the steel pipes must be bent, and the bending process requires specific techniques, with varying degrees of bending. So, what are the technical requirements used in the production of steel bends?

1. Online heat treatment of the weld seam in the closed section can offset the welding stress of the steel bend, improve the weld microstructure, and anneal or normalize the entire cold-formed steel to relieve stress. The mechanical properties of cold-formed steel include strength, tensile strength, and elongation at break.

2. The surface of the steel bend must be free of bubbles, cracks, scars, wrinkles, inclusions, and delamination. Minor pits, bumps, indentations, hairlines, scratches, and indented iron scales are permissible, not exceeding 10% of the nominal thickness. Surface defects should be cleaned by grinding, but the thickness of the cold-formed steel after cleaning must not be less than the allowable thickness.

Therefore, the above-mentioned technology is used in the production of steel bends. With increasing bending and pipeline requirements, the technology used in steel bends will become increasingly advanced. During the bending process, burrs on the pipe should be cleaned promptly. The quality of steel bends is a major concern, as it determines subsequent processing and construction. Therefore, the quality of steel bends is crucial during production. So, what factors affect the quality of steel bends?

1. The precision of the bending jig is one of the factors affecting the quality of steel bends. In the manufacturing process of the bending jig, in addition to the limitations of specifications and dimensions, the user needs to select the appropriate bending jig based on the diameter of the steel bend.

2. When users select the relationship between the pipe diameter and wall thickness of steel bends, it is important to refer to the pipe processing and acceptance standards, reflecting the impact of the relative bending radius and relative wall thickness on the pipe quality. During pure bending, under the action of external force, the outer wall of the neutral layer is thinned by tensile stress, while the inner wall is thickened by compressive stress, resulting in a change in the cross-section of the steel bend.

3. The bending function and surface corrosion of the pipe itself also affect the quality of the steel bend. Observe the processing function and surface corrosion. The quality of steel bends is easily affected by the factors mentioned above, especially during the production process. Care must be taken during pipe manufacturing and bending, as many factors can influence pipe quality.