In a method for setting up a pipeline section of a pipe system in a heat network, which is provided for transferring a heat transfer fluid between a heat provider and a heat consumer, the pipeline section is subdivided into segments in a segmentation step. A segment characteristic variable is determined for each segment based on a physical soil characteristic variable. The determined segment characteristic variables of two adjacent segments differ by more than a predefined segment characteristic variable difference value. In a bedding determination step, segment embedding of a pipeline segment, introduced in the trench in this segment, in a water-permeable segment bedding material is predefined for each segment such that a heat loss of the heat transfer fluid transferred in the pipeline segment, which is averaged over the segment and is based on a unit of length, is lower than a predefined heat loss limit value.

A filled trench is disclosed. The filled trench comprises: a pair of conduits (3a, 3b) for delivering fluid with a different temperature in each of the conduits (3a, 3b), the pair of conduits (3a, 3b) being surrounded by filling material; a first section (5a) filled with a filling material of a first type (4a), wherein the first filled section (5a) of the filled trench occupies a space in between the pair of conduits (3a, 3b); and a second section (5b) filled with a filling material of a second type (4b). The filling material of the first type (4a) has a first thermal conduction coefficient and the filling material of a second type (4b) has a higher second thermal conduction coefficient. Further, a method for filling such a filled trench is disclosed.

A filled trench is disclosed. The filled trench comprises: a pair of conduits (3a, 3b) for delivering fluid with a different temperature in each of the conduits (3a, 3b), the pair of conduits (3a, 3b) being surrounded by filling material; a first section (5a) filled with a filling material of a first type (4a), wherein the first filled section (5a) of the filled trench occupies a space in between the pair of conduits (3a, 3b); and a second section (5b) filled with a filling material of a second type (4b). The filling material of the first type (4a) has a first thermal conduction coefficient and the filling material of a second type (4b) has a higher second thermal conduction coefficient. Further, a method for filling such a filled trench is disclosed.

A metal tubular component adapted to be associated with at least one other metal tubular component to form a joint, said metal tubular component having a longitudinal axis, a body and at least one first axial end adjacent to the body, said first axial end being provided with a connector including a thread and an internal abutment surface, the metal tubular component further including a wall with an internal surface, said internal surface being coated with a layer of a thermally-insulating material, said layer of thermally-insulating material being covered by a liner, said liner having an axial portion extending along the longitudinal axis and a radial portion, said radial portion extending along the internal abutment surface.

A metal tubular component adapted to be associated with at least one other metal tubular component to form a joint, said metal tubular component having a longitudinal axis, a body and at least one first axial end adjacent to the body, said first axial end being provided with a connector including a thread and an internal abutment surface, the metal tubular component further including a wall with an internal surface, said internal surface being coated with a layer of a thermally-insulating material, said layer of thermally-insulating material being covered by a liner, said liner having an axial portion extending along the longitudinal axis and a radial portion, said radial portion extending along the internal abutment surface.

In a method for setting up a pipeline section of a pipe system in a heat network, which is provided for transferring a heat transfer fluid between a heat provider and a heat consumer, the pipeline section is subdivided into segments in a segmentation step. A segment characteristic variable is determined for each segment based on a physical soil characteristic variable. The determined segment characteristic variables of two adjacent segments differ by more than a predefined segment characteristic variable difference value. In a bedding determination step, segment embedding of a pipeline segment, introduced in the trench in this segment, in a water-permeable segment bedding material is predefined for each segment such that a heat loss of the heat transfer fluid transferred in the pipeline segment, which is averaged over the segment and is based on a unit of length, is lower than a predefined heat loss limit value.

In a method for setting up a pipeline section of a pipe system in a heat network, which is provided for transferring a heat transfer fluid between a heat provider and a heat consumer, the pipeline section is subdivided into segments in a segmentation step. A segment characteristic variable is determined for each segment based on a physical soil characteristic variable. The determined segment characteristic variables of two adjacent segments differ by more than a predefined segment characteristic variable difference value. In a bedding determination step, segment embedding of a pipeline segment, introduced in the trench in this segment, in a water-permeable segment bedding material is predefined for each segment such that a heat loss of the heat transfer fluid transferred in the pipeline segment, which is averaged over the segment and is based on a unit of length, is lower than a predefined heat loss limit value.

Systems and methods are provided for insulating and heating a subsea pipeline. A system may comprise a subsea pipeline including a lower portion embedded in a seafloor and an upper portion above the seafloor. The system may include an insulating layer. The insulating layer may include a middle portion covering the upper portion of the subsea pipeline. The insulating layer may further include an end portion covering the seafloor. The insulating layer may form a cavity adjacent to the seafloor, the subsea pipeline, and the insulating layer. The system may further include a plurality of heater cables within the cavity. The plurality of heater cables may be configured to heat a fluid within the subsea pipeline. The plurality of heater cables may be separated from the subsea pipeline only by seawater or by soil of the seafloor within the cavity.

Systems and methods are provided for insulating and heating a subsea pipeline. A system may comprise a subsea pipeline including a lower portion embedded in a seafloor and an upper portion above the seafloor. The system may include an insulating layer. The insulating layer may include a middle portion covering the upper portion of the subsea pipeline. The insulating layer may further include an end portion covering the seafloor. The insulating layer may form a cavity adjacent to the seafloor, the subsea pipeline, and the insulating layer. The system may further include a plurality of heater cables within the cavity. The plurality of heater cables may be configured to heat a fluid within the subsea pipeline. The plurality of heater cables may be separated from the subsea pipeline only by seawater or by soil of the seafloor within the cavity.

A system for transporting and storing hydrogen and its mixtures from their supplier to customers, partially located underground, including at least two vertically positioned tubular elements connected with each other by a tubular element forming a tubular U-profile, the upper end of the tubular element is connected via a non-return valve, to the tubular element into which the pump pumps hydrogen from the tubular element connected to the at least one supplier of hydrogen, the upper end of the tubular element is connected via a non-return valve to the tubular element connected to at least one consumer of hydrogen, a heating and cooling device adheres to the outer surfaces of the tubular elements, the tubular U-profile is placed below the ground surface, below the permafrost border, and the weight of the upper layer of the earth above the tubular U-profile balances the planned gas pressure in the tubular elements.