The dimensional tolerance requirements of forged flanges are usually specified by the relevant national or industry standards. The following is the range of dimensional tolerance requirements under general circumstances: Outer diameter dimensional tolerance: According to the provisions of the standard, the requirements of outer diameter dimensional tolerance are usually in the range of plus or minus 0.5 mm. Inner diameter dimensional tolerance: The requirements of inner diameter dimensional tolerance are also stipulated in the standard, generally within the range of plus or minus 0.5 mm. Flange thickness tolerance: Flange thickness tolerance requirements are usually in the range of plus or minus 0.3 mm. Threaded hole center line offset tolerance: For flanges with threaded holes, the center line offset tolerance is generally within plus or minus 0.25 mm. It is important to note that the specific dimensional tolerance requirements may vary depending on different standards, specifications and customer requirements. Therefore, in the actual processing process, manufacturers will refer to the corresponding standards and specifications, combined with specific needs and customer requirements to develop, and ensure that the processed flange meets the design and use requirements. It is best to confirm the standards used with the specific manufacturer or designer to obtain accurate dimensional tolerance requirements.
