Coupling for gas container.

摘要

The invention relates to a coupling for a gas container, the gas container itself and a method of making the container. The coupling (10) is arranged between the gas container (11) and a valve (14) and comprises a nut (13) and cooperating flange surfaces. An adapter (12) which seals against the opening of the container through a sealing ring (19) forms a unit together with the valve (14). The container is arranged to enclose pure gases under high pressure and comprises a number of welded parts (30-32). The inner surface of the container has a surface evenness of at the most 3 mu m. The method of making the container includes among other things the preparation of inner surfaces before welding.