Abstract: A T-piece preformer for forming a T-piece in a pipe-in-pipe (PIP) pipeline for a marine environment, the PIP pipeline has at least inner and outer pipes having an annular space thereinbetween, and one or more cables extending along the annular space. The T-piece preformer includes at least: (a) inner and outer longitudinal collars; (b) annular walls between the inner and outer collars; (c) cable apertures through each annular wall; and (d) one or more guide points on the outer collar radially offset from the or each cable apertures, to guidance for a hole into the T-piece performer. The T-piece preformer can be assembled into a PIP pipeline, and requires a final hole during laying. The T-piece preformer has cable apertures through each annular wall, for allowing continuation of cables in the annular space through the PIP pipeline and T-piece preformer, and the T-piece.

Abstract: A barrier connector arrangement (20) for a multi-pipe pipeline (14) for use in a subsea environment, the pipeline (14) comprising at least one inner pipe (12) and an outer pipe (11) having a dry annulus (13) thereinbetween, and one or more cables (50, 51) extending along the annulus (13), the connector arrangement (20) comprising: an outer housing (21) configured to be joined to the outer pipe (11) to define a dry interior housing with the annulus (13); and one or more dry barrier chambers (26, 27) extending through and welded to the housing (21) for connecting one or more of the cables (50, 51) in the pipeline (14) with one or more external cables in the subsea environment.

Abstract: A T-piece preformer for forming a T-piece in a pipe-in-pipe (PIP) pipeline for a marine environment, the PIP pipeline has at least inner and outer pipes having an annular space thereinbetween, and one or more cables extending along the annular space. The T-piece preformer includes at least: (a) inner and outer longitudinal collars; (b) annular walls between the inner and outer collars; (c) cable apertures through each annular wall; and (d) one or more guide points on the outer collar radially offset from the or each cable apertures, to guidance for a hole into the T-piece performer. The T-piece preformer can be assembled into a PIP pipeline, and requires a final hole during laying. The T-piece preformer has cable apertures through each annular wall, for allowing continuation of cables in the annular space through the PIP pipeline and T-piece preformer, and the T-piece.

Abstract: A barrier connector arrangement (20) for a multi-pipe pipeline (14) for use in a subsea environment, the pipeline (14) comprising at least one inner pipe (12) and an outer pipe (11) having a dry annulus (13) thereinbetween, and one or more cables (50, 51) extending along the annulus (13), the connector arrangement (20) comprising: an outer housing (21) configured to be joined to the outer pipe (11) to define a dry interior housing with the annulus (13); and one or more dry barrier chambers (26, 27) extending through and welded to the housing (21) for connecting one or more of the cables (50, 51) in the pipeline (14) with one or more external cables in the subsea environment.