Method for manufacturing a vessel and a double-wall tank

A method for manufacturing a double-wall tank configured for housing a fluid within, the method comprising:

• i) providing a vessel manufactured according to the following steps:
• a) providing at least two at least partially cured fiber reinforced polymer (FRP) structures shaped with complementary coupling interfaces configured to match with each other, such that an interior volume is defined when the at least partially cured FRP structures are coupled to each other to form an assembly:
• b) coupling the at least partially cured FRP structures to each other such that the interior volume is defined;
• c) winding at least one layer of FRP material onto at least a portion of the at least partially cured FRP structures once coupled to each other;
• and
• d) curing the assembly resulting from step c), and
• ii) providing at least two at least partially cured fiber reinforced polymer (FRP) tank structures shaped with complementary coupling interfaces configured for matching with each other, such that an interior chamber is defined when the at least partially cured FRP tank structures are coupled to each other, the interior chamber being sized for housing the vessel provided in step i), such that a gap is defined between the outer side of the vessel and the inner side of the at least partially cured FRP tank structures when the vessel is housed within the interior chamber;
• iii) coupling the at least partially cured FRP tank structures to each other enclosing the vessel provided in step i) within;
• wherein at least a spacer is provided between the outer side of the vessel and the inner side of the at least partially cured FRP tank structures for maintaining the at least partially cured FRP tank structures at a predetermined distance from the vessel;
• iv) winding at least one layer of FRP material onto at least a portion of the at least partially cured FRP tank structures once coupled to each other to form an assembly;
• and
• v) curing the assembly resulting from step iv).