This part of ÖNORM EN ISO 17078 provides requirements for flow control devices used in side-pocket mandrels in subsurface wells in the petroleum and natural gas industry. This includes requirements for specifying, selecting, designing, manufacturing, quality control, testing, and preparation for shipping of flow control devices. Additionally it includes information regarding performance testing and calibration procedures. The installation and retrieval of flow control devices is outside the scope of this part of ÖNORM EN ISO 17078. Additionally, this document is not applicable to flow control devices that are for use in center-set mandrels or with tubingretrievable applications. This part of ÖNORM EN ISO 17078 does not include requirements for side-pocket mandrels, running, pulling, and kickover tools, and latches that may or may not be covered in other ISO specifications. Reconditioning of used flow control device is outside of the scope of this part of ÖNORM EN ISO 17078. Whenever the term ¿flow control device¿ is used in this document, it refers to flow control devices used in sidepocket mandrels in subsurface wells in the petroleum and natural gas industry.