Pressure pipeline flange type test coverage

The flange type test of pressure pipelines is usually carried out according to relevant standards or specifications, such as the internationally widely used ASME standard, the European EN standard or the Chinese GB standard, etc. In these standards, the coverage of flange type tests usually includes requirements for flange design, materials, dimensions, rated pressure, etc. During type testing, flanges of specific specifications are usually selected for testing, and based on the test results, it is inferred whether flanges of the same model, same material, but different sizes or pressure levels are qualified. Tests usually include pressure test, leakage test, fatigue test, etc. to ensure that the flange can work safely and reliably within the specified working pressure and temperature range. If specification coverage is not clearly stated in the standard you are reviewing, it may be because: 1. The standard may assume that the sample specifications for type testing are representative of a range of products of similar specifications. 2. The standard may anticipate that users will decide whether to accept or reject flanges based on specific application conditions by comparing the results of flange use with similar or identical materials and manufacturing processes. 3. There may be standards or documentation in other parts that define coverage that do not appear in the part you are reviewing. If you require more precise information, I recommend consulting directly with the relevant professional agency responsible for inspection of piping equipment, or contacting the flange manufacturer for specific type testing details. You can also directly consult other parts of the specific standard document, such as appendices or relevant chapters, which may have more detailed instructions. If it is a GB standard, the corresponding information may also be stipulated in the China Special Equipment Inspection Institute (CSEI) or related industry standards. .

The TSG D7002-2023 pressure piping component type test rules are very clear. Flange only needs: Material category, forging level