Issues with the transportation and storage of sulfuric acid; seeking answers from experts!
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For the storage and transportation of sulfuric acid in newly built factories, are there any relevant industry standards available for reference regarding pipelines, valves, and so on? ? Seek guidance~
It depends on the acidity level and temperature; common materials include fluorinated lining valves and pipes, carbon steel, as well as fiberglass, stainless steel, and so on.
Reference: \"Manual for the Installation and Design of Process Piping in Petrochemical Plants\"
There are relevant requirements; once a problem arises, it’s not a minor issue
We have been using carbon steel pipes for transportation, which are generally replaced every four years. The acid storage tanks are also made of carbon steel. Valves lined with PTFE can last longer once in use; in particular, ordinary valves should not be used at the pump inlets and outlets, as their replacement frequency is too high.
Our factory originally used carbon steel pipes (340 meters), and after half a year of use, acid accumulated in the pipes during winter. After solidification and blockage, there was no solution; diesel was poured along the pipeline using straw ropes and then burned, which caused frequent leaks. Later, 304 pipes were used instead, following specifications of 0. Designed with a 3% slope, and a drain valve is installed at the lowest point to direct flow into the sump. No leakage has occurred after 3.5 years of use. The valve is an F4-lined ball valve
The original pipeline design was flawed; it was impossible to drain all the acid along its length. After the plant stopped operating for 5 hours at night, the pipeline became blocked. More than 100 people were mobilized to use walkie-talkies to control the process of setting fires, and pumps were used to force the flow of liquid through the pipeline, despite the temperature being minus 5 degrees. :L
Materials that can be used to transport concentrated sulfuric acid include carbon steel pipes, low-chromium cast iron pipes, stainless steel pipes, etc