A bundle of pipelines comprising a first pipeline, a second pipeline and a plurality of bundling assemblies, wherein: - the first pipeline and the second pipeline are extending alongside one another in a mutually parallel manner in a longitudinal direction of the bundle of pipelines, wherein the bundling assemblies in the longitudinal direction are positioned at a distance from one another; - each bundling assembly comprises a spacer and at least two tensioning straps (21, 22, 23), wherein the spacer is mutually spacing apart the first pipeline and the second pipeline in a direction perpendicular to the longitudinal direction, wherein the spacer comprises a first side and a second side, lying opposite to the first side, wherein the first side is facing the first pipeline and the second side is facing the second pipeline, wherein, as seen in a circumferential direction around the longitudinal direction, the first side partially envelopes the first pipeline and the second side partially envelopes the second pipeline, and wherein the at least two tensioning straps in the longitudinal direction are positioned at a distance from one another, wherein each tensioning strap (21, 22, 23) as one closed loop is surrounding the first pipeline, the spacer and the second pipeline together in said circumferential direction, and wherein tensioning force of the tensioning strap is fixing the spacer relative to the first pipeline; - the at least two tensioning straps comprise a first tensioning strap and a second tensioning strap, wherein the first tensioning strap is extending in a first longitudinal range in the longitudinal direction and the second tensioning strap is extending in a second longitudinal range in the longitudinal direction; and - the spacer comprises, at the first side, a first abutment structure for abutting against the first pipeline and comprises, at the second side, a second abutment structure for abutting against the second pipeline, wherein the second abutment structure is extending at least in the first longitudinal range and in the second longitudinal range; characterized in that - the second abutment structure of the spacer, as seen in the longitudinal direction, is at least partly interrupted in a first intermediate longitudinal range in-between the first longitudinal range and the second longitudinal range in that the second side of the spacer comprises, in the first intermediate longitudinal range, a first recessed intermediate surface portion, which, relative to the second abutment structure in the first longitudinal range and in the second longitudinal range, is recessed in the direction of the first abutment structure of the spacer. - the first pipeline and the second pipeline are extending alongside one another in a mutually parallel manner in a longitudinal direction of the bundle of pipelines, wherein the bundling assemblies in the longitudinal direction are positioned at a distance from one another; - each bundling assembly comprises a spacer and at least two tensioning straps (21, 22, 23), wherein the spacer is mutually spacing apart the first pipeline and the second pipeline in a direction perpendicular to the longitudinal direction, wherein the spacer comprises a first side and a second side, lying opposite to the first side, wherein the first side is facing the first pipeline and the second side is facing the second pipeline, wherein, as seen in a circumferential direction around the longitudinal direction, the first side partially envelopes the first pipeline and the second side partially envelopes the second pipeline, and wherein the at least two tensioning straps in the longitudinal direction are positioned at a distance from one another, wherein each tensioning strap (21, 22, 23) as one closed loop is surrounding the first pipeline, the spacer and the second pipeline together in said circumferential direction, and wherein tensioning force of the tensioning strap is fixing the spacer relative to the first pipeline; - the at least two tensioning straps comprise a first tensioning strap and a second tensioning strap, wherein the first tensioning strap is extending in a first longitudinal range in the longitudinal direction and the second tensioning strap is extending in a second longitudinal range in the longitudinal direction; and - the spacer comprises, at the first side, a first abutment structure for abutting against the first pipeline and comprises, at the second side, a second abutment structure for abutting against the second pipeline, wherein the second abutment structure is extending at least in the first longitudinal range and in the second longitudinal range; characterized in that - the second abutment structure of the spacer, as seen in the longitudinal direction, is at least partly interrupted in a first intermediate longitudinal range in-between the first longitudinal range and the second longitudinal range in that the second side of the spacer comprises, in the first intermediate longitudinal range, a first recessed intermediate surface portion, which, relative to the second abutment structure in the first longitudinal range and in the second longitudinal range, is recessed in the direction of the first abutment structure of the spacer.