Stainless steel pickling and passivation

2017-08-05View Original

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Stainless steel pickling and passivation: 1. Is it necessary to do this on both the inside and outside of the stainless steel? 2. Is a blue dot test required for all of them? 3. Can the blue spot test be waived for pickling and passivation used for internal cleaning? 4. Standards, process documents?

Reply #22017-08-21

Reference can be made to \"HG/T2806 Guidelines for the Management of Austenitic Stainless Steel Pressure Vessels\"; it is necessary to determine whether acid washing and passivation are required based on the operating conditions, as it is not necessary for all vessels

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Stainless steel pickling and passivation

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