| 摘要 |
1,188,103. Welding by fusion. BALDWINLIMA-HAMILTON CORP. 24 Jan., 1969 [4 March, 1968], No. 4068/69. Heading B3R. [Also in Divisions F2 and F4] A water tube 34 of a steam generator (see Division F4) is welded to a tube sheet 26 around an opening 32, as by means of a welding torch T, the weld being made through the wall of the tube into the tube sheet. If the tube sheet is more than # inch thick, a counterbore 48 may be provided to reduce heat transfer from the tube so as to avoid excessive thermal stresses. |
