On-site level gauge setting on the equipment

The local level gauge serves two main purposes: 1) to provide an immediate visual indication for the workers carrying out inspections; 2) in the event of a remote-level gauge, it can be used for calibration purposes. When setting up an in-situ level gauge, the range of liquid level changes in the equipment must be taken into account; the reading range of the level gauge should be at least as wide as that range of liquid level changes. Furthermore, in cold regions, it is essential to pay attention to the heating of local level gauges.

When specifying the location of the local level gauge, it is entirely based on the equipment’s assembly diagram; by referring to the upper and lower positions indicated on that diagram for the local level gauge, its height can be determined. Once purchased, the equipment supplier will deliver the local level gauge along with the equipment to the site.

The location of the level gauge must be determined by professionals, and all design institutes are capable of doing this. The height is determined based on the user’s requirement to know the level of liquid in the tank, that is, the range that the level gauge needs to measure.

I agree with the opinion from the second floor, and would like to add the following: 1. It would be more appropriate for the process engineering team to determine the location of the in-situ level gauge. 2. The main considerations are orientation (or level gauge connection position) and height. When choosing the orientation, should consideration be given to whether there is any overlap with other pipe openings? Is it easy to observe? More factors need to be considered when selecting the height; if it is a storage tank, it is necessary to ensure that the liquid level throughout the entire tank can be monitored ； For liquid level monitoring of operating equipment on a device, ease of operation and control should be given priority; too low a height is not conducive to such operation and control, whereas it leads to higher investment costs for the equipment.

Total length of the in-situ level gauge: For general containers, the maximum liquid level is 85% of the total volume (90% for internal floating roof tanks and storage tanks with larger volumes). Based on this principle, the total length of the level gauge can be determined, and it should be no less than the maximum liquid level. Position of the liquid level gauge outlet: it is better to place it as close as possible to the tangent line at the bottom of the head, but it is necessary to leave sufficient welding space. If the diameter of the outlet pipe on site is DN25, it is acceptable for the centerline of the outlet to be 100 mm away from the tangent line of the lower head.

The location of the in-situ level gauge is determined by the process engineering team, based on factors such as the range of liquid level fluctuations within the container, the operating platforms surrounding the container, and the maintenance access routes, while taking into account relevant standard requirements. Local level gauges, while meeting the process requirements, should be easy to operate and control, as well as convenient for maintenance.

It's needed. Instrumentation can be implemented only after the process specifies the required operating conditions

Supporting the 2nd and 5th floors, the local level gauge serves two main purposes: 1) to provide clear visibility for maintenance workers, and 2) to act as a calibration tool in case a remote level gauge is available. When setting up an in-situ level gauge, the range of liquid level changes in the equipment must be taken into account; the reading range of the level gauge should be at least as wide as that range of liquid level changes. Furthermore, in cold regions, it is essential to pay attention to the heating of local level gauges. 1. It would be more appropriate for the process engineering team to determine the location of the in-situ level gauge. 2. The main considerations are orientation (or level gauge connection position) and height. When choosing the orientation, should consideration be given to whether there is any overlap with other pipe openings? Is it easy to observe? More factors need to be considered when selecting the height; if it is a storage tank, it is necessary to ensure that the liquid level throughout the entire tank can be monitored ； For liquid level monitoring of operating equipment on a device, ease of operation and control should be given priority; too low a height is not conducive to such operation and control, whereas it leads to higher investment costs for the equipment.

The selection of the level gauge and its measurement range should be determined based on the process requirements and those specified by the equipment manufacturer.