What material is used for low-temperature vessel supports?

Thread Content

When selecting materials for the supports of low-temperature containers, the design temperature of the container is taken into account primarily; in areas with very low ambient temperatures (during winter), the impact of such ambient temperatures must also be appropriately considered. I. Saddle and ear-type supports (1) Not subjected to alternating loads: When the design temperature is between -19°C and 0°C, Q235-AF or Q235A shall be selected ； When the design temperature is -40 to -20°C, Q235B or 16Mn should be selected ； When the design temperature is below -40°C, materials with a lower level of low-temperature toughness than that of the compressed components, or materials of the same grade, should be selected. (2) For those subjected to alternating loads or where failure could have serious consequences: when the design temperature is between -19 and 0°C, Q235B or 16Mn should be used, with additional impact tests at room temperature required; when the design temperature is between -30 and -20°C, 16MnR should be used; when the design temperature is below -30°C, materials with low-temperature toughness one grade lower than that of the pressure-bearing components, or materials of the same grade, should be selected. II. Leg-type and support-type bearings: When the design temperature is between -19~0°C, Q235 or 16Mn is used (as determined by strength calculations) ； When the design temperature is between -30 and -20°C, 16Mn should be selected ； For design temperatures below -30°C, materials with a lower level of low-temperature toughness than that of the stressed components, or materials with the same toughness level, should be selected. III. Skirt base: When the ambient temperature is between -19~0°C, Q235A or 16MnR should be used (the choice is determined based on strength requirements). When the ambient temperature is not higher than -20°C, 16Mn should be used, and impact toughness tests at -20°C must be conducted. In addition, a transition section made of the same material as the low-temperature vessel body should also be provided at the upper part of the skirt.