19207-12472301 Revision A Page 5 of 123 Downloaded from https://www.everyspec.com TABLE OF CONTENTS Preface.......................................................................................................................................................3 List of Tables..............................................................................................................................................9 List of Figures...........................................................................................................................................11 1 GENERAL PROVISIONS ...............................................................................................13 1.1 Scope ............................................................................................................................................13 1.2 Approval .........................................................................................................................................13 1.3 Materials.........................................................................................................................................13 1.4 Welding Processes.........................................................................................................................16 1.5 Equipment Calibration....................................................................................................................16 1.6 Definitions.......................................................................................................................................16 1.7 Welding Symbols............................................................................................................................16 1.8 Safety Precautions .........................................................................................................................17 1.9 Standard Units of Measurement ....................................................................................................17 3 WORKMANSHIP ............................................................................................................19 3.1 General...........................................................................................................................................19 3.2 Preparation of Base Material..........................................................................................................19 3.3 Assembly........................................................................................................................................21 3.4 Control of Distortion and Shrinkage ...............................................................................................22 3.5 Weld Profiles ..................................................................................................................................22 3.6 Rework/Repairs..............................................................................................................................23 3.7 Cleaning of Completed Welds........................................................................................................24 4 TECHNIQUE...................................................................................................................25 (Variable Polarity) Welding ............................................................................................25 4.1 Material Requirements ...................................................................................................................25 4.2 Welding Processes.........................................................................................................................25 4.3 Shielding Gases .............................................................................................................................25 4.4 Preheat Requirements ...................................................................................................................25 4.5 Interpass Temperature Requirements ...........................................................................................25 4.6 Arc Strikes ......................................................................................................................................25 4.7 Cleaning Prior to Welding` .............................................................................................................25 4.8 Weld Termination ...........................................................................................................................25 4.9 Backing to Prevent Melting Through..............................................................................................26 4.10 Peening ..........................................................................................................................................26 4.11 Thermal Stress-Relief Treatment...................................................................................................26 Part A General Requirements For Gas Metal Arc, Gas Tungsten Arc, Plasma Arc Part B Gas Metal Arc Welding .................................................................................................26 4.12 General...........................................................................................................................................26 4.13 Restrictions on Gas Metal Arc Welding With Single Electrode......................................................26 Part C General Requirements Gas Tungsten Arc Welding .....................................................27 4.14 General...........................................................................................................................................27 4.15 Tungsten Electrodes ......................................................................................................................27 4.16 Restrictions on Gas Tungsten Arc Welding ...................................................................................28 Part D Plasma Arc Welding ......................................................................................................28 4.17 General...........................................................................................................................................28 4.18 Tungsten Electrodes ......................................................................................................................28 4.19 Restrictions on Variable Polarity Plasma Arc Welding ..................................................................28 Status:
RELEASED Date: 6/3/03