There is a common risk of difficult to clean equipment or components.<br>1) "Cl-pol-fe001 GMP plant facility design review" stipulates that the complexity of equipment and cleaning operation shall be considered in design, and for complex cleaning operation, automatic cleaning process shall be considered. Special products shall be considered for parts or equipment that are difficult to clean.<br>2) "H3-sop-41004 management procedure for cleaning of production equipment" stipulates that equipment or parts that are difficult to clean shall be used exclusively. Before changing varieties of non special equipment for production, it is necessary to thoroughly clean the equipment (especially the non special equipment starting from the crude refining) to prevent cross contamination.<br>Conclusion: the existing SOP meets the requirements of the regulations.<br>
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