PrefaceThis is the fifth and final volume of the 7th Edition of the Welding Handbook. This volume contains revisions to several chapters that last appeared in Volume (Section) 1 of the 6th Edition of the Handbook. These revisions include symbols for welding@ brazing@ and nondestructive testing; economics and cost estimating; codes and standards; inspection; and safe practices. The volume also includes new chapters on the design for welding@ fixtures and positioners@ automation and control@ qualiftcation and certification@ and weld quality. The information in this volume wiii be particularly useful to engineering as well as manufacturing and inspection personnel. The chapter on symbols is a guide to the use of symbols@ not the standard for symbols that is published separately (AWS A2.4@ Symbols for Welding and Nondestructive Testing). The information on codes and standards includes currently published documents. The reader should verify the existence and latest edition of a code or standard before applying it to a product. Safe practices@ the last but perhaps the most important chapter@ should be referred to when planning an installation as well as during equipment installation and operation. An index of the major subjects in all five volumes of the Welding Handbook preceeds the volume index. It enables the reader to quickly determine the appropriate volume and chapter in which the desired information can be found.