The most comprehensive checklist for reviewing 3D models of chemical plants

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Generally, the review of 3D models for chemical plant design is carried out at 30%, 60%, and 90% completion levels. As for what aspects should be examined in such reviews, let’s take a look below: ◆ General layout and equipment arrangement (1) Whether it meets the requirements for process integration and optimization； (2) Road/railway planning ； (3) Feasibility of lifting/maintenance of large-scale equipment such as reactors, towers, and air coolers ； (4) Optimized layout of utility units and process units ； (5) Whether the layout of process units that may emit flammable gases, tank farms, buildings, vehicle/train loading and unloading areas, flares/chimneys, wastewater treatment plants, air coolers, etc., meets the requirements of the wind direction with the lowest frequency throughout the year ； (6) Safety distances between various process units, tank areas, and buildings ； (7) Considerations for future modifications and expansions/interfaces ； (8) Are the fire separation distances between the main equipment and buildings within the facility meeting the requirements? ； (9) Main pipes of the inlet and outlet devices ； (10) Maintenance space (space for removing heat exchanger tube bundles, space for removing furnace tubes, large compressors, catalyst feeding/unloading, etc.) ◆ Safety and operability (1) Safety of equipment access/operation/maintenance ； (2) Do the safety evacuation routes for the equipment framework and platform meet the requirements? ； (3) Are there any obstacles in the channel space? ； (4) Are there sufficient safety distances between the remote shut-off valve and the pressure reducing valve, ensuring that it is easy for personnel to reach them in emergency situations? Can the relevant equipment be viewed from this location? ； (5) Whether the safe distance between the fire extinguishing steam distribution pipes and the equipment to be protected is sufficient ； (6) Is it easy for the operators to operate the drain/vent valves, and is it possible to easily observe the flow of fluid from this position? ； (7) Are necessary utility hose stations installed on the main operating platforms and on the vertical equipment platforms where the operating temperature is high? ； (8) Can the discharge of steam/condensate pose a threat to personnel safety? ； (9) Are the blower inlets in the control room and analysis laboratory within the device located in a safe area? ◆Fire protection (1) Are there convenient and safe access routes to manually operated fire protection equipment and valves? ； (2) In the event of an accident and one road is blocked, can fire trucks reach the scene easily? ； (3) Considering the relevant protected equipment, examine the locations of fixed and mobile fire-fighting facilities such as fire hydrants, fire monitors, water sprinklers, and fire extinguishers ； (4) Are the piping and nozzles of the liquefied gas tank water spray system properly arranged? ； (5) Is the rainwater valve manifold located within the safe range of the equipment it protects? ； (6) Is the emergency eye wash and shower installed near equipment for handling acids, bases, and other corrosive chemicals? ◆ Pipes (1): Can the pipe height meet the clearance requirements of the passage? ； (2) All branch pipes of steam pipelines shall lead out from above the main pipe ； (3) Gas pipelines should avoid low pockets to prevent condensation; if this is unavoidable, external heating facilities should be provided ； (4) Is the venting/emptying setting reasonable? ； (5) Drainage facilities should be provided at the lowest points of steam pipes ； (6) Except for the use of top-flat tees on the horizontal pipes at the pump inlet, bottom-flat tees should be used on other horizontal pipes ； (7) Is the inlet pipeline of the compressor sloped toward the liquid separation tank, and is there a drain at each low point? ； (8) Small diameter (