Materials capable of withstanding temperatures ranging from -70°C to 160°C per ASME standards
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Dear experts, I’m facing the difficulty mentioned in the title when selecting materials for design. Operating conditions of the deethanizer: Dimensions: Φ2600/Φ1800H46500; design pressure: 4.5 MPa; design temperature: -70°C to 160°C. For domestic grades, 09MnNiDR can be used directly; however, since an ASME grade is required, I checked and chose SA353’s 9Ni grade. But this material has a temperature range of -195 to 121 degrees, so it cannot be used. I want to use SA537, but the low-temperature curve for UCS66 doesn’t work. I’m asking the experts here for help????????Help!
If that doesn’t work, consider using 304 or designing it in multiple layers.
SA203GrD or GrE – this type of steel is a 3.5Ni low-temperature steel capable of withstanding temperatures down to -101°C; the equivalent domestic grade is 08Ni3DR.
Since it is to be used in national standards, your material’s impact test is inevitable; then why go through the trouble of calculating the UCS-66 low-temperature curve? Since escape is impossible, then if a shock test is conducted, the minimum operating temperature will naturally not be an issue. Additionally, since UCS-66 cannot be used, have any further calculations been done regarding the stress ratio, in order to further reduce MDMT?