Hang-off system and method for use of hang-off system

A method for pull-in of a first end of a transfer pipe using a hang-off system for hang-off of an end section of a first end of a transfer pipe to a floating structure or vessel, the end section of the transfer pipe being provided with a pipe hang-off flange, wherein the hang-off system comprises:

• a gas balcony structure configured for being fastened to an outside of a shipside of the floating structure or vessel, the gas balcony structure comprising a hang-off collar configured to secure the transfer pipe to the gas balcony structure, wherein the hang-off collar comprises:
• at least two collar flanges, the at least two collar flanges defining a central opening of the hang-off collar for passing through the end section of the first end of the transfer pipe, and wherein at least one of the collar flanges is movably arranged on the hang-off collar,
• a linear actuator for moving the at least one movable collar flange between a first position and a second position,
• wherein when in the first position, the central opening is larger than a transverse cross-sectional area of the pipe hang-off flange, and
• wherein when in the second position, the central opening is smaller than a transverse cross-sectional area of the pipe hang-off flange,
• such that at least a portion of the at least two collar flanges is configured to be arranged directly below and parallel with the pipe hang-off flange, whereby the at least two collar flanges are configured to vertically support the transfer pipe via the pipe hang-off flange;
• a clamping mechanism configured to clamp the pipe hang-off flange to the at least two collar flanges by applying pressure in a direction parallel to a longitudinal axis of the transfer pipe,
• wherein the gas balcony structure comprises a winch system for pull-in and/or release of the transfer pipe through the central opening, the method comprising:
• having the collar flanges in the first position,
• fastening a winch wire of the winch system to the end section of the transfer pipe,
• hoisting the end section through the opening of the hang-off collar until the pipe hang-off flange is above the collar flanges,
• when the hang-off flange is above the collar flanges, moving the collar flanges to the second position using the linear actuator and maintaining the second position, then
• paying out the winch wire to lower the transfer pipe until the pipe hang-off flange reaches the collar flanges, then
• clamping the pipe hang-off flange to the collar flanges using the clamping mechanism.