Cargando…
Professional diver's manual on wet-welding.
Versatility, speed and low cost make wet-stick welding an attractive method for use in underwater repair and construction. This training manual and reference book contains step-by-step procedures for performing basic manual metal arc welding operations together with information on welding equipment,...
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Cambridge :
Abington,
1990.
|
| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Front Cover; Professional Diver's Manual on Wet-Welding; Copyright Page; Table of Contents; PREFACE; INTRODUCTION; CHAPTER 1. INTRODUCTION TO WET-STICK WELDING; Aims of this section; Principles of operation; Underwater welding techniques; Factors in planning underwater welding operations; CHAPTER 2. EQUIPMENT; Aims of this section; Power supply (general; DC generator; Drooping characteristic; Setting the current; Current ratings; Personal equipment; Electrode holder; Power cables; Safety switch; CHAPTER 3. ELECTRODES; Aims of this section; Electrodes general; Electrode identification.
- Care of electrodesFlux coatings; Waterproofing; MMA electrode constituents; CHAPTER 4. HEALTH AND SAFETY; Aims of this section; General precautions; Electric shock treatment; CHAPTER 5. WELDING TERMINOLOGY; Aims of this section; Welding positions; Terms used in welding; CHAPTER 6. METALLURGY; Aims of this section; Microstructure of wet-welds; Microhardness; CHAPTER 7. DEFECTS OF UNDERWATER WELDS; Aims of this section; Hydrogen cracking; Lamellar tearing; Technique defects; CHAPTER 8. UNDERWATER WELDING PROCESS PARAMETERS; Aims of this section; Arc characteristics; Travel speed.
- Electrode size and typeWater environment and its effects; Magnetism; Effective demagnetisation techniques; CHAPTER 9. WELDER QUALIFICATIONS/WELDING PROCEDURES; Aims of this section; Welder approval qualifications; Welding procedure; Welding procedure approval; CHAPTER 10. NDT AND DESTRUCTIVE TESTING FOR QUALITY CONTROL; Aims of this section; Visual inspection; Magnetic particle inspection; Ultrasonic inspection; Radiographic inspection; Macro examination; Preparation of surface; Etching procedure; Break test; Fillet weld fracture test; Bend test; Hardness test; Tensile test.
- CHAPTER 11. PREPARING TO WELDAims of this section; Joint fit-up; Joint preparation; Welding current selection; Electrode angle; Arc length; Travel speed; Surface cleaning; Recording and monitoring; Poor fit-up; CHAPTER 12. PRACTICAL WET-WELDING EXERCISES; Index to exercises; Exercise 1: Striking the arc/breaking the arc; Exercise 2: Electrode manipulation; Exercise 3: Pad weld
- flat position; Exercise 4: Outside corner fillet weld
- flat position -single pass; Exercise 5: Fillet weld
- flat position
- single pass; Exercise 6: Fillet weld
- horizontal-vertical
- single pass.
- Exercise 7: Fillet weld
- pipe to plate
- horizontai-vertical
- single passExercise 8: Fillet weld
- horizontal-vertical- multi-pass; Exercise 9: Fillet weld
- vertical down
- single pass; Exercise 10: Fillet weld
- vertical down
- multi-pass; Exercise 11: Fillet weld
- overhead
- single pass; Exercise 12: Fillet weld
- overhead
- multi-pass; Exercise 13: Fillet weld
- pipe to plate
- horizontal-vertical- multi-pass; Exercise 14: Poor weld fit-up technique.