How should some materials for internal pressure vessels be selected?
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At the moment, we only check whether the strength is sufficient based on the drawings, but I don’t understand why this material was chosen For example, why is 16MnⅢ used for flanges, and why is Q345R used for the cylinder body? Are there any reference books for material selection?
Material selection involves utilizing the inherent properties of materials to meet the performance requirements of equipment. The diversity of the environments in which pressure vessels are used, along with the functional requirements of these devices, adds a certain degree of complexity to the selection of materials ； The semi-scientific and semi-empirical nature of materials science makes material selection more difficult ； Understanding materials helps to better comprehend the parameters in pressure vessel design, and by considering specific equipment, it is possible to gain a targeted understanding of material properties. Attention should be paid to specific materials such as plates, tubes, forgings, and bars. When selecting materials, it is necessary to determine the material grade; if needed, additional technical requirements for material procurement as well as those related to the cold and hot processing of the steel should be specified, in order to ensure that the final state of the materials meets the design specifications. The quality and specifications of the materials used for pressure vessels shall comply with the corresponding **standards and industry standards. The steel used for the stressed components and the unstressed components welded directly to them shall be accompanied by a quality certificate for the steel issued by the steel manufacturer. Pressure vessel manufacturers shall inspect the steel in accordance with the quality certificate, and conduct re-inspection if necessary. Steel for pressure vessels should take into account the operating conditions of the vessel (such as design temperature, design pressure, properties of the medium, structural and operational characteristics, etc.), the properties of the material (mechanical properties, processability, chemical and physical properties), the manufacturing processes for the vessel, as well as economic viability. In addition, the processing properties of the material and economic factors must also be considered.
This cannot be explained in just a few words. First of all, there is the issue of the suitability of the material – for example, with ordinary carbon steel plates, the wall thickness varies depending on the material, so a comprehensive consideration is necessary
This question is too big. You’re still standard; I didn’t see the position.
It is recommended that the original poster study *HG/T 20581-2011 Requirements for the Selection of Materials for Steel Chemical Process Vessels* and GB/T 3059-2014 *Identification of Damage Modes in Pressure Equipment*; this will be very beneficial.