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1. The following materials should be used in the normalized state: (1) Q245R and Q345R for the inner cylinders of multi-layer containers； (2) Shell thicknesses greater than 36 mm use Q245R and Q345R ； (3) Other compressed components with a thickness greater than 50 mm (flanges, tube sheets, flat covers, etc.) are made of Q245R and Q345R ； 2. For normalized or normalized and tempered steel plates with a thickness greater than 80 mm, an additional impact test at 1/2T can be added. 3. For steel pipes with a wall thickness greater than 30 mm and those intended for use at temperatures below -20°C, it is not permitted to use hot rolling at a final rolling temperature that corresponds to the normalizing temperature as a substitute for normalizing heat treatment. 4. The blanks for carbon steel studs shall be subjected to normalizing heat treatment. 5. Flanges made of carbon steel and low-alloy steel shall undergo normalizing heat treatment under either of the following conditions: (1) The thickness of the flange cross-section is greater than 50 mm ； (2) Forged flange ； 6. For compression components made from steel that has been normalized or normalized followed by tempering, cold forming or warm forming is preferred; when using warm forming, it is necessary to avoid the temperature range in which the steel becomes brittle due to tempering. 7. For normalized or normalized and tempered steel plates with a thickness greater than 50 mm, an additional impact test at 1/2T can be conducted. This article is from the Design Institute website www.shejiyuan.com