ISO 5199 / ISO 2858 Technical specifications for centrifugal pumps — Class II
This International Standard is one of a set dealing with technical specifications of centrifugal pumps; they are designated as Classes I, II and III. Class I comprises the most severe and Class III the least severe requirements. The selection of the class to be used is in accordance with the technical requirements for the application for which the pump is intended. The class chosen should be agreed between the purchaser and supplier. Furthermore, additional safety requirements concerning the field of application should be taken into account. However, it is not possible to standardize the class of technical requirements for centrifugal pumps for a certain field of application, because each field of application comprises different requirements. All classes (I, II and III) can be used in accordance to the different requirements of the pump application. So it may happen that pumps built in accordance with Classes I, II and III may work beside one another in the one plant. Further requirements covering specific applications or industries may be dealt with in separate standards. Criteria for the selection of the required class of a pump for a certain application may include: — reliability,
— required operating life,
— operating conditions,
— environmental conditions,
— local ambient conditions.