What are the key points for reviewing drawings of mechanical equipment?
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During the equipment design and selection process, what aspects need to be considered during the review of drawings? Things such as material, liquid drainage, gas exhaust, and flushing procedures are relevant here. Are there any specific standards or regulations that provide detailed rules or constraints regarding these aspects?
Static equipment can generally be reviewed in accordance with standards such as those for pressure vessels and boilers. As a starting point, let’s briefly discuss the review of drawings for dynamic equipment: 1. Review the basic data provided by the owner in the drawings, such as meteorological information (ambient temperature, relative humidity, rainfall and snowfall, wind direction and speed, air pressure, depth of frozen soil, altitude, sunlight exposure, dry and wet bulb temperatures, etc.), earthquake intensity, and conditions related to utility services (water, steam, wind, power supply). 2. Review the relevant materials submitted by other departments of the design institute in areas such as process, electrical systems, instrumentation, safety, fire protection, environmental protection, architecture, and structure, including data sheets, classification of explosion-proof areas, protection and corrosion resistance levels, and layout diagrams of foundation bolts. 3. Review the boundary conditions for design, supply, and construction, such as pipe end specifications and materials, allowable load on flanges, dimensional dimensions, and overall layout diagrams. 4. Conduct preliminary research on the performance of the models selected by the manufacturing plant, as well as their usage status. Examine the model specifications, performance curves, the materials used for the main unit and its components, the configuration of subcontractors, and the list of spare parts. For large-scale units, it is also necessary to review the PID settings, instrument control logic diagrams, instrument interlock lists, electrical wiring diagrams, etc. You can take a look at HG/T 20704-2000 \"Regulations on the Management of Engineering Design in the Pump Industry\", which is mainly used for design management work and will certainly be helpful.
The review focuses primarily on the process conditions, such as process parameters like flow rate, temperature, pressure, and medium; of course, material compatibility and efficiency and energy consumption are also taken into consideration.