Developments in tube to tubeplate welding

The development of a bore welding technique that has been applied in the production of boilers for nuclear power stations is discussed. After a description of the weld geometry and the basic welding process, the discussion covers the work necessary to establish the welding parameters and the associated development of welding torches and welding programme controllers. An account is given of some methods that have been employed to overcome certain metallurgical/welding process problems together with the development of non-destructive testing techniques. (author)