Liquefied petroleum gas cylinder issues
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During the inspection of a liquefied petroleum gas cylinder, stress corrosion cracks were found in multiple areas inside the cylinder. Upon reviewing the supply quality certificate, it was confirmed that the liquefied petroleum gas contains a certain amount of moisture as well as hydrogen sulfide with a partial pressure of approximately 0.36 KPa. May I ask: What kind of environment is this tank in? What is the relationship between this environment and stress corrosion? What defects are likely to occur?
Compare it with the wet hydrogen sulfide stress corrosion in 20581
There are many cases of stress corrosion and hydrogen blistering in LPG spherical tanks; the design parameters must be clearly defined, and strict control is required over the composition of the medium during use