Table 3.24.2 GTAW stainless steel welding procedures
Table 3.25.1 Nominal compositions of some of duplex steels
Table 3.25.8 Stainless steel welding wire rod and heat treatments
Table 3.6.2 Nominal mechanical properties of duplex stainless steels
Table 3.29.1 Advantages and limitations of PAW process
Table 4.4.1 Deposition rate of various GMAW metal transfer mode
Table 4.4.1.1 WPS for carbon steel and low alloy steels with short circuit transfer mode
Table 4.4.1.2 Aluminum WPS for short circuit
Table 4.4.1.3 The transition current for spray transfer currents
Table 4.4.1.4.1 Carbon steel – Basic training WPS for spray transfer welding
Table 4.4.1.4.2 Aluminum – Basic training WPS for spray transfer welding
Table 4.5.1 Details the current and the shielding gas type used in spray transfer mode of some of the common materials
Table 4.5.5.1 Gas selection guide
Table 4.12.1.4 Welding lead current carrying capacity
Table 5.5.1 Carbon steel electrodes their use descriptions
Table 5.6.6.1 Impact of shielding gases on the mechanical properties of weld metal
Table 6.10.7 Indicates the basicity of various fluxes
Table 6.11 Common welding electrodes for SAW process
Table 7.1 Pipe schedule
Table 7.2 Terms and abbreviations relating to welding and construction
Table 7.3 F-Number, ASME specification and AWS classification
Table 7.4 P-number, group number, and type of material
Table 7.5 Qualification of metals based on the procedure qualification
Table 7.6 Temperature conversion
Table 7.7 Temperature and pressure
Foreword
The book, “Arc Welding Processes Handbook”, brings together salient knowledge of arc welding methods used primarily in the industry and especially in the oil patch. The information presented about the welding process is usable and emulates the presence of your own welding engineer. Covering such welding methods as SMAW, GTAW, GMAW, FCAW and SAW with details in materials and techniques. This book is useful to both new welders as well as experienced welders. In the book, Ramesh covers these welding processes, how they work, and dives into the electrical side of welding. Welding machines, Transformers, Generators, Invertors, AC, DC, Sq. wave, Sine wave currents, Rectifiers, SCRs, Diodes, etc., as current control methods, all these are presented in a way that is easy to understand the functions of various welding machines. Most common weldable materials are discussed with welding guidance given that includes Aluminum, Nickel, Carbon steels, Stainless steels, Precipitation Hardened steels, Duplex Stainless steels, and others. The book is super comprehensive, easy to follow, and a welcome addition to any welding engineer’s bookcase. It is a truly great guide for any budding engineer or welder to help them master their skills.
David Ammerman Project Director at Gulf Interstate Engineering, MME, Texas PE 30+ years past-member of ASME, and member of API Committee: Pipeline Construction Voting Group
Preface
The book Arc Welding Processes Handbook has been developed to address the need of a vast majority of people who want to know about welding, some of them also want to weld as hobbyists, or carry their passion for welding to be a professional welder. The book can also be used as a reference by field engineers and managers responsible for welding and fabrication activities. The book uses several figures and illustration that are available in the public domain, yet wherever it could be identified, the credit has been assigned to the source.
The book will provide readers and practitioners of the profession with an understanding of nearly all aspects of arc welding. The book covers the theory, the principles of the processes, the equipment, and the techniques that would improve the competency in welding, for each welding process. A good number of tables and illustrations are included to accentuate the points as well as to give readers familiarity with things that may or may not be available in their work or school trade workshops.
Chapter 1 introduces the reader to all possible welding process, including arc welding, electric resistance welding etc.
The practice welding procedure (WPS) given especially in Chapter 2 on SMAW process should prove a good basis to start welding and develop into an experienced welder. From here, one can move forward with other processes using the practice welding procedures included in Chapter 3 on GTAW, as well as GMAW processes in Chapter 4. For those who want to start welding, they can start with settings in these procedures and preparations and make changes to develop their skills around them. But it is not necessary to strictly follow this sequence, if someone has already developed the skills in any other process and wants to move to any other process.
The skills required to master FCAW process in Chapter 5 almost mimics the basic skills of GMAW in Chapter 4, and once this process is mastered, moving forward with the FCAW process should not be difficult at all.
The process of SAW in Chapter 6 is very different and very few welding schools will have this process in house. For students to practice on it, in most cases it will have to be learned and mastered on the job. But the chapter on SAW process gives the reader abundant information and familiarity with the process that they can step up to the opportunity when it becomes available.
Included in Chapter 7 is the welding symbols and how to use them, to read those symbols on fabrication drawings and weld accordingly. Reading and understanding the language of welding is an important step in becoming a successful welding professional. The chapter also includes other miscellaneous but important information that would come handy to any welding professional. The most important information is the detailed description of welding symbols and how to use and read them.
This
