To determine whether the quality of the forged flange is qualified, it can be considered from the following aspects: Appearance quality: First of all, it is necessary to check whether the appearance of the forged flange is complete and smooth, without obvious cracks, bumps or dents and other defects. The surface should have no obvious signs of oxidation, rust, etc., and be clearly marked and marked. Size deviation: Use a measuring tool to check whether the size deviation of the forged flange is within the allowable range. It is necessary to pay attention to the diameter, aperture, screw hole size and spacing of the measurement flange, and the corresponding size should meet the design requirements and relevant standards. Material quality: The material selection of forged flanges should meet the design requirements and relevant standards. The conformity of materials can be verified through material certificates and chemical composition analysis. In addition, samples can also be taken for physical and mechanical properties, such as tensile strength, impact toughness and so on. Test certificate: Qualified forged flanges should be equipped with a complete product test certificate, including material certificate, size test report, chemical composition analysis report, non-destructive test report, etc. These certificates can provide assurance and traceability of product quality. Sealing performance: Testing the sealing performance of forged flange is an important indicator to judge its quality. The sealing performance of the flange can be tested by hydraulic test or air tightness test, and ensure that it can work normally under the design pressure without leakage. In addition, it is recommended to choose a manufacturer with a good reputation and quality assurance, and conduct sufficient market research and brand comparison. At the same time, before using the forged flange, carefully review the relevant design drawings, standards and specifications to ensure that the forged flange meets the requirements of the specific engineering application.
