The invention provides a method of connecting together two unit elements (4, 4) of a fluid transport pipe, each unit pipe element being made of metal alloy and being covered in an outer insulating coating (6, 6) made of a thermoplastic material, with the exception of an end portion that does not have an outer insulating coating, the method comprising a step of butt-welding together two unit pipe elements at their end portions having no outer insulating coating, a step of mechanically assembling at least two rigid shells (14, 16) made of a thermoplastic material on the end portions of the unit pipe elements not having an outer insulating coating, and a step of keeping the shells sealed against the outer insulating coating of the two unit pipe elements.

The invention provides a method of connecting together two unit elements (4, 4) of a fluid transport pipe, each unit pipe element being made of metal alloy and being covered in an outer insulating coating (6, 6) made of a thermoplastic material, with the exception of an end portion that does not have an outer insulating coating, the method comprising a step of butt-welding together two unit pipe elements at their end portions having no outer insulating coating, a step of mechanically assembling at least two rigid shells (14, 16) made of a thermoplastic material on the end portions of the unit pipe elements not having an outer insulating coating, and a step of keeping the shells sealed against the outer insulating coating of the two unit pipe elements.

An insulating insert is positioned around a field joint of a pipeline to insulate the field joint. The insert includes a longitudinal series of annular or part-annular filler segments of insulating material, curved about a longitudinal axis, that are each joined to one or more adjacent segments of the series by at least one link. The links may be webs, rods or articulated links. The links are flexible relative to the segments to facilitate bending of the insert along its length by enabling relative angular displacement between adjacent segments of the series.

An insulating insert is positioned around a field joint of a pipeline to insulate the field joint. The insert includes a longitudinal series of annular or part-annular filler segments of insulating material, curved about a longitudinal axis, that are each joined to one or more adjacent segments of the series by at least one link. The links may be webs, rods or articulated links. The links are flexible relative to the segments to facilitate bending of the insert along its length by enabling relative angular displacement between adjacent segments of the series.

The present invention relates to a pipeline junction coating between the joined ends of two coated metallic pipeline sections, the coating comprising an elongate body able to extend over the joined ends of the coated pipeline sections, and having a variable end profile at one or both ends. The pipeline junction coating is for coating field joints of coated rigid pipelines, as used in the subsea oil and gas industry.

The present invention relates to a pipeline junction coating between the joined ends of two coated metallic pipeline sections, the coating comprising an elongate body able to extend over the joined ends of the coated pipeline sections, and having a variable end profile at one or both ends. The pipeline junction coating is for coating field joints of coated rigid pipelines, as used in the subsea oil and gas industry.

Extrudable compositions were prepared comprising poly(propylene) and a liquid additive comprising a lactam group. The compositions can comprise other optional additives that include a polyhemiaminal, antioxidants, UV light absorbers, and surfactants. The extruded compositions have higher percent elongation at break and lower Young's modulus compared to extruded poly(propylene) lacking the liquid additive. These and other property improvements make the extruded compositions attractive for forming field joint coatings for undersea pipeline applications.

A device is for clamping one or more inserts arranged outside pipes during the assembly of pipes for pipelines serving to transport oil, gas or water. The device has a clamping device which at least partially encloses the inserts with a slot with a length-stable layer arranged against a flexible tube on a side of the layer such that a flexible tube arranged in the layer follows the slot. The layer is coupled to the flexible tube and ends of the length-stable layer have end pieces of a length configured in or around the inserts and/or the slot such that the end pieces of the length-stable layer are prevented from displacement relative to the inserts. The flexible tube is supplied with a medium that can be pressurized and/or cured in an expanded state between the length-stable layer and the inserts without increasing a nominal diameter of length-stable layer.

A device is for clamping one or more inserts arranged outside pipes during the assembly of pipes for pipelines serving to transport oil, gas or water. The device has a clamping device which at least partially encloses the inserts with a slot with a length-stable layer arranged against a flexible tube on a side of the layer such that a flexible tube arranged in the layer follows the slot. The layer is coupled to the flexible tube and ends of the length-stable layer have end pieces of a length configured in or around the inserts and/or the slot such that the end pieces of the length-stable layer are prevented from displacement relative to the inserts. The flexible tube is supplied with a medium that can be pressurized and/or cured in an expanded state between the length-stable layer and the inserts without increasing a nominal diameter of length-stable layer.

The invention relates to a method of welding and assembling a component, where two or more parts of pre-insulated pipes (1) are welded together to form components of two or three parts. The pre-insulated pipes (1) consist of an outer casing (2), an inner casing (3) and an intermediate insulation (4). The outer casing (3) during the process is beveled, the insulation (4) is cleared and thermal welding is carried out with the corresponding part of another pipe. After the resulting component has cooled, the gap between the outer casings (2) thereof is filled with polymer resin.