A method of manufacturing a lightweight pressure tank comprising a lightweight pressure vessel (1; 1'; 1"; 101) of a metal material having at least one polar or equatorial mounting element (14; 4, 4'; 5) and a vessel wall (16; 16'; 16") connected thereto; wherein at least the vessel wall (16; 16'; 16") is formed by additive manufacturing by means of a thermal spraying process by applying the metal material by a spray jet (32; 32'; 32") by means of at least one spray nozzle (30; 30'; 30") of a thermal spraying device (3; 3'; 3") onto a mould surface (20; 20'; 20") of a domed formwork mould (2; 2'; 2") forming a mould body, integrally with the at least one polar or equatorial mounting element (14; 4, 4'; 5); with the steps of a) providing the at least one polar or equatorial mounting element (4, 4'; 5), which has at least one mounting portion (40; 50) and at least one vessel wall portion (42; 52), which forms a portion of the vessel wall of the lightweight pressure tank produced by the method, wherein the vessel wall portion (42; 52) has at least one circumferential edge region (44; 54, 54'), the wall thickness of which tapers towards the free circumferential edge (45; 55, 55') to form a contact surface (46; 56, 56') extending obliquely in cross-section; b) positioning the at least one polar or equatorial mounting element (4, 4'; 5) at or on the concave or convex mould surface (20; 20'; 20") of the domed formwork mould (2; 2'; 2") in such a way that the contact surface (46; 56, 56') faces away from the mould surface (20; 20'; 20"); c) application of the metal material by a spray jet (32; 32'; 32") directed onto the mould surface (20; 20'; 20") by means of at least one spray nozzle (30; 30'; 30") in accordance with the thermal spray method onto the contact surface (46; 56, 56') of the mounting element (4, 4'; 5) and onto the mould surface (20; 20'; 20") of the domed formwork mould (2; 2'; 2"), wherein the thermal spray device (3; 3'; 3") moves over the mould surface (20; 20'; 20") of the domed formwork mould (2; 2'; 2"); 2"), the thermal spray device (3; 3'; 3") travelling over the mould surface (20; 20'; 20") of the domed formwork mould (2; 2'; 2") to form a domed vessel wall member (17', 17"; 17′′′) seamlessly adjoining the contact surface (46; 56, 56') and integral with the vessel wall portion (42; 52); d) separating the assembly of the at least one mounting element (4, 4'; 5) and the vessel wall element (17', 17"; 17′′′) from the domed formwork mould (2; 2'; 2"). a) providing the at least one polar or equatorial mounting element (4, 4'; 5), which has at least one mounting portion (40; 50) and at least one vessel wall portion (42; 52), which forms a portion of the vessel wall of the lightweight pressure tank produced by the method, wherein the vessel wall portion (42; 52) has at least one circumferential edge region (44; 54, 54'), the wall thickness of which tapers towards the free circumferential edge (45; 55, 55') to form a contact surface (46; 56, 56') extending obliquely in cross-section; b) positioning the at least one polar or equatorial mounting element (4, 4'; 5) at or on the concave or convex mould surface (20; 20'; 20") of the domed formwork mould (2; 2'; 2") in such a way that the contact surface (46; 56, 56') faces away from the mould surface (20; 20'; 20"); c) application of the metal material by a spray jet (32; 32'; 32") directed onto the mould surface (20; 20'; 20") by means of at least one spray nozzle (30; 30'; 30") in accordance with the thermal spray method onto the contact surface (46; 56, 56') of the mounting element (4, 4'; 5) and onto the mould surface (20; 20'; 20") of the domed formwork mould (2; 2'; 2"), wherein the thermal spray device (3; 3'; 3") moves over the mould surface (20; 20'; 20") of the domed formwork mould (2; 2'; 2"); 2"), the thermal spray device (3; 3'; 3") travelling over the mould surface (20; 20'; 20") of the domed formwork mould (2; 2'; 2") to form a domed vessel wall member (17', 17"; 17′′′) seamlessly adjoining the contact surface (46; 56, 56') and integral with the vessel wall portion (42; 52); d) separating the assembly of the at least one mounting element (4, 4'; 5) and the vessel wall element (17', 17"; 17′′′) from the domed formwork mould (2; 2'; 2").