Compiled as a useful tool for on-the-job welding personnel by the AWS Product Development Committee. Contents: Basic Safety, Visual Inspection Notes, Discontinuity Types - Cracks, Inclusions, Incomplete Fusion, Incomplete Joint Penetration, Overlap, Porosity, Undercut, and Weld Profiles - , Fillet Weld Measurement, Dimensional Considerations, Plate and Pipe Dimensions, Metric Conversion Table, and Nondestructive Testing Symbols.