What are the design criteria and functions of the settlement marker plates on the wall of a methanol storage tank?
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Dear experts, my company has set settlement mark plates at a height of 200 mm above the tank bottom on the walls of its methanol storage tanks. These settlement mark plates are distributed evenly along the tank walls, and their number complies with the requirements specified in SH/T3528-2014 (4 plates for tanks with a capacity of less than 2000 cubic meters, 8 plates for those with a capacity between 2000 and 5000 cubic meters, and 24 plates for tanks with a capacity of over 30,000 to 50,000 cubic meters). When the tanks were constructed, the design and construction standards applied were: “Design Code for Vertical Cylindrical Welded Steel Storage Tanks in the Petrochemical Industry, SH 3046-1992” and “Construction and Acceptance Rules for Vertical Cylindrical Welded Oil Tanks, GBJ128-1990”. Question 1: Can this be used to replace the basic settlement point for daily monitoring? Question 2: Does it meet the relevant requirements specified in SH/T3528-2014? The first one is a list of tank parameters ； The second one shows the material and quantity of the settlement marker plates ； The third one shows the location of the settlement marker plates on the tank wall and their installation method. The fourth one is the requirements for setting settlement observation points as specified in SH/T3528-2014.
Question 1: Settlement marker plates can be used as a substitute for foundation settlement points for routine monitoring. Settlement marker plates are used to monitor the settlement of the tank walls. By observing whether these marker plates settle, it is possible to determine if there is any abnormal settlement in the tank walls, allowing for timely action to be taken for repair or maintenance. Question 2: Based on the information you provided, the number of settlement marker plates installed meets the requirements specified in SH/T3528-2014. This standard specifies that storage tanks of different volumes should have a varying number of settlement observation points; the numbers of 4, 8, or 24 settlement marker plates you mentioned all meet the requirements of the standard. In summary, the settlement marker plates installed on your company’s methanol storage tanks can be used to replace the foundation settlement points for daily monitoring, and they meet the relevant requirements specified in SH/T3528-2014. .