Height of the external pipe gallery in the factory area

This post was last edited by ylb913 on 2018-7-20 07:22. I have personally seen ceilings with heights of 1200 and 1400 millimeters; heights of around 2000 millimeters are mentioned in the standards. This is likely related to the scale of the installation as well as the diameter of the pipes used. Find the SEPD 0121 specifications for ductwork design: 2.3 Height and layer spacing of ductways 2.3.1 The height and layer spacing of ductways are determined by the following factors: a) Whether pumps or heat exchange equipment are installed below the ductway ； b) Are the pumps located beneath the ductwork in a enclosed pump room, in a shed, or outdoors? ； c) Requirements for headroom below the pipe gallery as a maintenance passage or when the pipe gallery crosses a road ； d) The diameter of most of the pipes in the ductwork, as well as their connection height to the frames and equipment on both sides of the ductwork. 2.3.2 When the pumps located beneath the ductwork are installed outdoors, at least 3.5 m of height is required to accommodate the operation of the pumps (such as the height of the vertical pipes needed for the pump inlet and outlet connections and the suspension beams), as well as for maintenance purposes. When the pipes in the pipe gallery are connected to the equipment on both sides, their height should be 0.6 m to 1.0 m lower or higher than the elevation of the pipes in the lower layer of the pipe gallery. Therefore, the minimum elevation of the top of the lower beam in the pipe gallery is 3.5 m. In fact, the elevation of the top of the lower beam, which is commonly used in designs, ranges from 4.0 m to 4.5 m, as shown in Figure 3.1-1. 2.3.3 When the pumps located beneath the pipe gallery are placed in a pump room or shed, the height difference between the lower beam of the pipe gallery and the roof of the pump room or shed should allow the pipes to be easily connected to the equipment on both sides of them via the sides of the pipe gallery after changing elevation. The elevation difference resulting from this change in the pipeline direction is 0.6 m to 1.0 m. When cooling equipment is installed beneath the pipe tray, the minimum height of the lower crossbeams should be determined by taking into account both the pipes related to the cooling equipment and the pipes located in the lower layer of the pipe tray. 2.3.4 The clear height below the pipe tray, where it serves as a maintenance passage, or when the pipe tray crosses a road, is: a) When the area below the pipe tray is used as a maintenance passage, the clear height must be no less than 3 m, as shown in Figure 3.1-1 ； b) When the duct bank crosses an access walkway, the clear height shall be not less than 4.5 m ； c) When the duct tunnel crosses a railway, the clear height (from the ground) shall be not less than 5.5 m. 2.3.5 The height difference between layers of the pipe gallery is 1.2 m to 2.0 m, while the height difference between the crossbeams and side beams is 0.6 m to 1.0 m, depending on the scale of the installation and the diameter of the majority of pipes. The connection between the pipeline and the equipment on both sides of the pipe tray should prevent the formation of liquid pockets in the pipeline. 2.3.6 Pipes near the device boundaries or in other areas that do not affect traffic can be laid on pipe supports, with the top of the supports being at a height of approximately 0.5 m.

They are all different; the main considerations are maintenance and vehicle traffic.

The clear height of the pipe gallery should be determined based on the space required for the installation and maintenance of pumps and heat exchangers located beneath it, as well as taking into account the height of the connections to the equipment on both sides of the pipe gallery. When the pipe gallery crosses a road, it must also meet the safety height required for vehicle passage. The minimum clear height for general ductwork is as follows: When the ductwork crosses the main roads within the facility, the minimum clear height should be ≥6 m; when it crosses the ordinary roads within the facility, the minimum clear height should be ≥4.5 m. When pumps are installed beneath the ductwork, the minimum clear height must be >3.5 m

These are specified in the \"National Training Materials for Pressure Piping\", the \"Manual for the Installation and Design of Process Piping in Petrochemical Plants\", \"Design of Pressure Piping and Examples\", \"Engineering Applications in Piping Design\", as well as standard SH 3011. The floor height on the first level of the equipment corridor should be: 2.2 meters for pedestrian passage, 3.5 meters for forklift passage, 4 meters for fire trucks, and 5.5 meters for large fire trucks. 2.3 Height of the pipe gallery and spacing between floors 2.3.1 The height of the pipe gallery and the spacing between floors are determined by the following factors: a) Whether pumps or heat exchange equipment are installed below the pipe gallery ； b) Are the pumps located beneath the ductwork in a enclosed pump room, in a shed, or outdoors? ； c) Requirements for headroom below the pipe gallery as a maintenance passage or when the pipe gallery crosses a road ； d) The diameter of most of the pipes in the ductwork, as well as their connection height to the frames and equipment on both sides of the ductwork. 2.3.2 When the pumps located beneath the ductwork are installed outdoors, at least 3.5 m of height is required to accommodate the operation of the pumps (such as the height of the vertical pipes needed for the pump inlet and outlet connections and the suspension beams), as well as for maintenance purposes. When the pipes in the pipe gallery are connected to the equipment on both sides, their height should be 0.6 m to 1.0 m lower or higher than the elevation of the pipes in the lower layer of the pipe gallery. Therefore, the minimum elevation of the top of the lower beam in the pipe gallery is 3.5 m. In fact, the elevation of the top of the lower beam, which is commonly used in designs, ranges from 4.0 m to 4.5 m, as shown in Figure 3.1-1. 2.3.3 When the pumps located beneath the pipe gallery are placed in a pump room or shed, the height difference between the lower beam of the pipe gallery and the roof of the pump room or shed should allow the pipes to be easily connected to the equipment on both sides of them via the sides of the pipe gallery after changing elevation. The elevation difference resulting from this change in the pipeline direction is 0.6 m to 1.0 m. When cooling equipment is installed beneath the pipe tray, the minimum height of the lower crossbeams should be determined by taking into account both the pipes related to the cooling equipment and the pipes located in the lower layer of the pipe tray. 2.3.4 The clear height below the pipe tray, where it serves as a maintenance passage, or when the pipe tray crosses a road, is: a) When the area below the pipe tray is used as a maintenance passage, the clear height must be no less than 3 m, as shown in Figure 3.1-1 ； b) When the duct bank crosses an access walkway, the clear height shall be not less than 4.5 m ； c) When the duct tunnel crosses a railway, the clear height (from the ground) shall be not less than 5.5 m. 2.3.5 The height difference between layers of the pipe gallery is 1.2 m to 2.0 m, while the height difference between the crossbeams and side beams is 0.6 m to 1.0 m, depending on the scale of the installation and the diameter of the majority of pipes. The connection between the pipeline and the equipment on both sides of the pipe tray should prevent the formation of liquid pockets in the pipeline. 2.3.6 Pipes near the device boundaries or in other areas that do not affect traffic can be laid on pipe supports, with the top of the supports being at a height of approximately 0.5 m.