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This part of ISO 13628 specifies requirements and gives recommendations for the design, material selection, manufacture, design verification, testing, installation and operation of umbilicals and associated ancillary equipment for the petroleum and natural gas industries. Ancillary equipment does not include topside hardware. Topside hardware refers to any hardware that is not permanently attached to the umbilical, above the topside hang-off termination. This part of ISO 13628 applies to umbilicals containing components, such as electrical cables, optical fibres, thermoplastic hoses and metallic tubes, either alone or in combination. This part of ISO 13628 applies to umbilicals for static or dynamic service, with surface-surface, surface-subsea and subsea-subsea routings. This part of ISO 13628 does not apply to the associated component connectors, unless they affect the performance of the umbilical or that of its ancillary equipment. This part of ISO 13628 applies only to tubes with the following dimensions: wall thickness, t < 6 mm, internal diameter, ID < 50,8 mm (2 in). Tubular products greater than these dimensions can be regarded as pipe/linepipe and it is expected that they be designed and manufactured according to a recognised pipeline/linepipe standard. This part of ISO 13628 does not apply to a tube or hose rated lower than 7 MPa (1 015 psi). This part of ISO 13628 does not apply to electric cable voltage ratings above standard rated voltages 0m/()UUU = 3,6/6(7,2) kV rms, where U0, U and Um are as defined in IEC 60502-1 and IEC 60502-2.