The bent pipe is produced step by step and then made into a finished product, In the whole production process, because there are requirements for the pipe to be bent, in addition to the tube to have some bending technology, the degree of bending is not the same, so what is the technical requirements used in the entire production process?
- The welding stress of the elbow can be offset by the online heat treatment of the weld of the closed section, The mechanical properties of cold-formed steel include strength, tensile strength and elongation after fracture.
- There shall be no bubbles, cracks, scars, folds, inclusions and delaminations on the surface of the bent pipe. Slight pits, protuberances, indentations, hairline, scratches and pressed iron scales of not more than 10% of the nominal thickness are permitted. Surface defects shall be cleaned by grinding, but the thickness of the cold-formed steel after cleaning shall not be less than the allowable thickness.
Therefore, the above technology is used in the production of bent pipes. With the increase of bending requirements and pipe requirements, the technology used in pipes will become more and more advanced. Burrs on pipes should be promptly cleaned during the bending process, The quality of the elbow is a lot of people pay attention to one aspect, quality determines the late processing and construction, so in the production process, quality is really important, so what are the factors that affect the elbow quality?
- The accuracy of the bending tire is a factor that affects the quality of the elbow. In the manufacturing process of the bent tire, in addition to the limitations of specifications and sizes, the bending process also requires the user to choose the corresponding bending tire according to the diameter of the bend.
- For reference when users choose the relationship between pipe diameter and wall thickness, and reflect the influence of relative bending radius and relative wall thickness on pipe quality according to the acceptance standard of pipe processing, In pure bending, under the action of external force, the outer arm wall of the neutral layer becomes thinner by tensile stress and the inner side by compressive stress. The resultant force changes the cross-section of the pipe.
- The pipe itself bending function and appearance of corrosion will also affect the quality of bend pipe, observe the processing function and surface corrosion.
The quality of the elbow is easy to be affected by the above factors, especially in the production process, pipe production, bending should pay attention to, after all, many factors may affect pipe quality.