Should flexible connections be installed on the inlet and outlet pipes of acid and alkali storage tanks such as hydrochloric acid, sulfuric acid, and liquid caustic? What are the regulatory guidelines for this?

All three types of storage tanks have been used; no relevant specifications were found, and no such requirements were mentioned in any safety inspections at various levels. Was this a requirement put forward by the client? Experience in actual use shows that flexible connections need to be installed on the pipes at the outlet of the transfer pump; this is mainly to prevent leaks caused by vibrations, and it also facilitates disassembly during maintenance and cleaning. (In cases where there are impurities and a high flow rate, it is advisable to install flexible connectors in a straight section of pipe located somewhat away from the outlet valve, in order to prevent wear and damage.) No flexible connectors have been used on the acid inlet pipes, but the fixing brackets must be secure, and regular inspections should be carried out; there have been incidents where PVC pipes shifted, resulting in acid leaks. It is advisable to have a bypass behind the valve of the bottom outlet pipe, to facilitate cleaning and maintenance of the tank.

According to relevant specifications and standards, soft connections are generally not required for the inlet and outlet pipes of acid and alkali storage tanks such as hydrochloric acid, sulfuric acid, and liquid caustic. This is because the inlet and outlet pipes of acid and alkali storage tanks need to have high corrosion resistance and sealing performance to ensure the safe transportation and storage of chemical substances. The specific regulatory requirements include, but are not limited to, the following: 1. \"Code for Design of Petrochemical Enterprises\" (GB 50028-2016); 2. \"Code for Design of Pressure Piping\" (GB 150-2011); 3. \"Technical Specifications for Petrochemical Engineering Construction\" (PETS 0042-2018); 4. \"Code for Design of Chemical Engineering Plants\" (HGJ 233-2014). These codes and standards provide detailed regulations regarding the design of inlet and outlet pipelines for acid and alkali storage tanks, material selection, construction, and acceptance procedures. Specific operations should be carried out in accordance with the relevant codes. .

Large vertical storage tanks require flexible connections for the inlet and outlet pipes of acid and alkali tanks such as hydrochloric acid, sulfuric acid, and liquid caustic. It is mainly for preventing settlement and earthquakes. Refer to specifications such as \"Pipeline Stress Analysis and Engineering Applications\" and \"Stress Analysis of Pressure Pipelines\" for explanations. :victory:

According to petrochemical regulations, flexible connections are required at the inlet of storage tank pumps; it is not necessarily a hose