Seeking guidelines for the installation of metal flexible hoses for seismic resistance and settlement prevention at storage tank nozzles
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I would like to ask everyone about the rules for installing metal flexible hoses near the inlet and outlet nozzles of chemical storage tanks, in order to provide earthquake resistance and prevent settlement of the tank foundation. There are two questions: 1. Starting from what volume of tank does it become necessary to install metal flexible hoses? 2. For the pipes connected to this tank, starting from what pipe diameter is it necessary to install metal hoses? No relevant specifications were found online; please help. National standards, petrochemical industry standards, or internal regulations from certain design institutes or engineering companies will also work ； Thank you all first!
In posts that require more technical expertise, let’s see what the design institute has to say
Download chemical industry standards; just take a look at the national standards to find out
Take a look at the chemical industry standards, **standards
The decisive factor is the settlement amount (which is related to geological conditions). Once the settlement amount is known and the pipe diameter is determined, the corresponding length can be obtained from the supplier.
Thank you for your reply! Should the impact of earthquakes be considered? Also, what criteria/basis is used to determine when a hose is needed?
For SH3412-1999 – Selection, Inspection, and Acceptance of Metal Hoses for Petrochemical Pipelines, the relevant forum is at http://bbs.hcbbs.cc/thread-1384356-1-1.html. Large design institutes have departments specialized in pipeline materials, and requirements are usually specified under the category of special components
It seems that the use of metal hoses is no longer recommended these days; flexible connections are advised to be used during piping.
Thank you for your reply! What are some other common forms of flexible connections here, besides components like metal hoses? Could you give some general examples? I only know that there are flexible metal hoses.
Thank you for your reply! I’ll learn this standard* for a bit. For special components such as safety valves, steam traps, metal hoses, and flame arrestors, it is the process engineering department that prepares the purchase request forms, as many of the details in these forms relate to process parameters.