This document, together with EN 474 1:2022, deals with all significant hazards, hazardous situations and events relevant to pipelayers as defined in 3.1, when used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer (see Annex A) associated with the whole lifetime of the machine as described in EN ISO 12100:2010, 5.4. The requirements of this document are complementary to the common requirements formulated in EN 474 1:2022. This document does not repeat the requirements of EN 474 1:2022 but supplements or modifies the requirements for pipelayers. This document also specifies additional requirements for rear mounted winches. This document does not provide performance requirements for safety related functions of control system(s). The following significant and relevant hazards are not covered in this document: – Transmission of power between self-propelled machinery (or tractor) and recipient machinery; – Laser; – Lightning. Pipelayers with rotating upper structure are excluded from the scope of this document. This document is not applicable to pipelayers manufactured before the date of publication of this document by CEN.