7 Unit 6 Types of Prints . . . . . . . . . . . . . . . . . . . . . . 83 Welders Who Read Prints 83 Working Drawings 83 Detail Drawing 84 Assembly Drawing 84 Specialized Drawings 86 Erection Drawing 86 Process Drawing 86 Parts List 86 Unit 7 Print Format. . . . . . . . . . . . . . . . . . . . . . . . 97 Shape Description 98 Size Description 98 Print Title Block 101 Material Specification 101 Tolerances 101 Quantity of Units 102 Scale of Drawing 102 Finish 102 Revisions 104 Next Assembly 104 Drawing Title 104 Print Number 104 Heat Treatment 104 Notes 104 Print Sheet Size 105 Zoning 105 Security Classification 106 Dimensioning Symbols 106 Unit 8 Basic Plane Geometry . . . . . . . . . . . . . . . 109 Plane Figures 109 Circles 110 Angular Measurement 112 Triangles 114 Parallel Lines and Interior Angles 116 Unit 9 Dimensioning Welding Prints . . . . . . . . . 119 Extension and Dimension Lines 120 Datum Dimensions 121 Zero Plane Dimensions 122 Direct and Calculated Dimensions 122 Linear and Angular Tolerance 122 Reference Dimensions 124 Geometric Dimensioning and Tolerancing 124 Definitions and Symbols 125 Application of GD&T 126 Orientation Geometric Tolerances 126 Form Geometric Tolerances 127 Other Geometric Tolerances 127 Unit 10 Welding Processes . . . . . . . . . . . . . . . . . . 133 Soldering (S) 133 Brazing (B) 134 Welding 134 Modern Welding Processes 134 Oxyfuel Gas Welding (OFW) 135 Shielded Metal Arc Welding (SMAW) 135 Gas Metal Arc Welding (GMAW) 136 Gas Tungsten Arc Welding (GTAW) 136 Flux Cored Arc Welding (FCAW) 136 Submerged Arc Welding (SAW) 137 Arc Stud Welding (SW) 138 Resistance Welding (RW) 138 Additional Welding Processes 140 Electron Beam Welding (EBW) 140 Friction Welding (FRW) 140 Friction Stir Welding (FSW) 140 Electroslag Welding (ESW) 142 Laser Beam Welding (LBW) 142 Ultrasonic Welding (USW) 142 Cold Welding (CW) 142 Microwelding 143 Flame Spraying (FLSP) 144 Automatic (Robotic) and Mechanized Welding Systems 146 Standard Welding, Joining, and Allied Processes 148 Unit 11 Threaded Fasteners . . . . . . . . . . . . . . . . . 151 Thread Forms 152 Thread Series 152 Thread Fit Classes 152 Thread Notes 153 Standard Thread Representations 154 Detailed Representation 154 Schematic Representation 154 Simplified Representation 154 Metric Threads 155 Types of Fasteners 155