Gas-fired boiler full-sealing membrane type wall structure adopting pipe end necking process

The utility model relates to the technical field of boilers, in particular to a gas-fired boiler full-sealing membrane type wall structure adopting a pipe end necking process. The utility model aims to solve the problems of high steel consumption, high forming difficulty of a boiler barrel body and high membrane wall assembly difficulty caused by increasing the calculated thickness of the boiler barrel body in order to ensure the strength of the barrel body of the conventional boiler. The boiler comprises an upper boiler barrel, a lower boiler barrel, a plurality of tube panels and a plurality of sealing assemblies, the upper boiler barrel is arranged above the lower boiler barrel in parallel, the tube panels are arranged on the left side and the right side between the upper boiler barrel and the lower boiler barrel, the upper ends of the tube panels are connected with the upper boiler barrel, and the lower ends of the tube panels are connected with the lower boiler barrel. A sealing assembly is arranged on t