Questions regarding the design and manufacture of stainless steel pressure vessels
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Our factory currently has a pressure vessel with a design pressure of 1.2 and a design temperature of 570°C. The vessel’s cylinder is fabricated from S31008 stainless steel sheets. Although the allowable stress at this design temperature can be found in GB150.2, the yield limit of this material at such a high temperature of 570°C is not available. In such cases, is it necessary to conduct additional high-temperature tests? If so, what are the specific procedures and standards to be followed?
The yield strength of S31008 stainless steel at high temperatures of 570°C can be found in the international standard ASTM A240 or the European standard EN 10028-7. If the relevant data cannot be found, high-temperature tests must be conducted to determine its performance. High-temperature testing generally requires compliance with the ASTM E21 or EN ISO 6892-2 standards, and the specific process includes steps such as sample selection, heat treatment, holding at high temperature, and testing. The test results will be used to calculate the stability and safety of stainless steel pressure vessels. It should be noted that high-temperature tests involve hazardous factors such as high temperatures and high pressures, requiring professional test design and safety measures. At the same time, it is necessary to ensure that the testing equipment and environment comply with ** and local regulations and standards. .
Although the corresponding yield strength values can be found in foreign standards, since they are after all foreign standards, is it possible to avoid using them for high-temperature tests and instead employ China’s GB/T 228 for such tests?