Maximum allowable operating pressure for S22053 duplex stainless steel flange material
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Design a storage tank made of duplex stainless steel, using material S22053. The design pressure is 6.0 MPa (G), the operating pressure is 5.8 MPa (G), and the design temperature is 50 degrees. Flanges should comply with the European standard HG/T20592, of the SO(RF) type. However, according to this flange standard, no data is available for this material; consequently, there is also no information regarding the maximum allowable operating pressure for this material. Should we consult the ASTM standards instead? If so, which one is the selection criterion? Thank you!
Refer to ASME_II-D-Metric: maximum allowable stress is 259 MPa at -30~100°C； 125°C, 254 MPa ； 150°C, 247 MPa ； 175℃, 241MPa ； 200°C, 236 MPa ； 225°C, 232 MPa. There is no allowable stress value above 225°C, indicating that 2205 is suitable for applications below 250°C.