Regarding the issue of hydrogen flow velocity in pipelines
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I would like to ask: According to GB50177, when the hydrogen pressure is between 0.1 and 3 MPa, the maximum flow velocity in stainless steel pipes is 25 m/s. If I use methanol to produce hydrogen, and the gas that has not been purified is a mixture of hydrogen and other impurity gases, then must the flow velocity of this gas also not exceed 25 m/s? Or rather, the regulations refer to hydrogen pressure; it should be pipelines containing pure hydrogen. If it’s a mixed gas, should the hydrogen pressure be determined based on the partial pressure of hydrogen?
Take it according to the specifications, less than 25 m/s