When arc welding in a confined area, such as a boiler, tank, or the hold of a ship, bear in mind that all the hazards associated with normal arc welding are amplified, so the precautions mentioned here are even more important. Techniques for welding fill and cap passes the exact procedure for welding fill and cap passes is dependent on the characteristics of the pipe wall thickness, temperature, and position on the pipe, the skill of the welder, as well as the characteristics of the welding machine. A free powerpoint ppt presentation displayed as a flash slide show on id. This process uses a consumable electrode covered with flux. Aug 18, 2016 millerwelds provide great guidelines for shielded metal arc welding. At the conclusion of the course, you will have the opportunity to attempt one american welding society smaw certification. The file size of this svg image may be abnormally large because most or all of its text has been converted to paths rather than using the more conventional element. Smaw is a wellestablished form of welding used extensively in commercial and industrial applications around the world. Without altering the gtaw wire composition, a proper flux coating was designed to produce a smaw electrode to give an enhanced weld composition. Emphasis also is placed on quality assurance and control, print reading, safety and workplace skills. Source extraction local exhaust is a mechanical device used to capture welding fume at or near the arc and filter contaminants out of the air. The welding technologystandards were validated with the adoption of the nationally recognized standards approved by the american welding society. Smaw welding the purpose of the joint preparation is to compensate for not having sufficient amperage and electrode diameter. The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems.
Developments in the welding process and discoveries in metallurgy have led. Smaw stick welding machine parts, parameter and tips. Aug 14, 2009 when welding from left to right, maintain a 0 to 15degree angle tilted towards the direction of travel. This circuit begins with the electric power source and includes the welding cables, an electrode holder, a workpiece connection, the workpiece. Describe the techniques required to produce openroot smaw pipe welds in all positions.
Applying shielded metal arc welding smaw techniques a ncient welders and tools have been seen depicted on egyptian tombs. Welding is the process of coalescing materials such as metals or thermoplastics in order to seamlessly join them. This document is not an application manual and does not contain a complete statement of all factors pertaining to those topics. Guidelines for shielded metal arc welding smaw warning this document contains general information about the topics discussed herein. The welding process involves applying heat and pressure to the materials being joined, in addition to a filler material, in order to create a weld pool which cools to form a strong joint. Browse training materials, articles and handbooks, or view our archive of welding videos. Describe the smaw techniques for root and fill passes on pipe. Shielded metal arc welding smaw is an arc welding process in which coalescence of metals is produced by heat from an electric arc that is maintained between the tip of a consumable covered electrode and the surface of the base metal in the joint being welded.
Fluxcoating development for smaw consumable electrode of. Before switching on your power supply, make sure that your workpiece is clean and free of dust. Identify and describe the four pipe welding positions and acceptable weld profiles. Welding fume particles may cause metal fume fever, and perhaps more importantly, manganese or chromiumrelated poisoning after inhalation and in. Smaw welding is same with stick welding, manual metal arc mma, and flux shielded arc welding.
Arc welding is usually used to weld iron and steel, although it can also be used for alloys aluminum, nickel, etc. Essential factors in gas shielded metal arc welding. The rest is spent in preparation and in removing slag. Objectives upon completion of this module, the trainee will be able to do the following. The electrode and the work are part of an electric circuit. If you cant rent a stud welding setup, i would just smaw weld them as you mentioned. Describe openroot pipe welding positions and related smaw techniques.
Safety welding techniques joint preparation proper machine set up all other course materials will be provided. Learn the five basic elements of stick welding technique to significantly improve your stick welding results. Shielded metal arc welding smaw, also known as manual metal arc welding mma or mmaw, flux shielded arc welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode covered with a flux to lay the weld. Also known as stick welding, flux shielded arc welding and manual metal arc welding mmaw, this is a relatively uncomplicated process as it uses simple equipment and its fairly straightforward to learn. The use of a wrong welding parameter or mishandling the welding equipment will result in unacceptable weldments that contain welding defects. The welding technology certificate of accomplishment in shielded metal arc welding smaw is for those interested in welding structural steel.
Because of its flexibility and mobility, gas welding is widely used for. Basic elements to improve results for many people, especially those who are new to it or perhaps dont weld every day, stick welding, otherwise known as shielded metal arc welding smaw, is one of the more difficult processes to learn. Mig or gmaw is one of the most popular welding processes. P roject c oordinator alex kyser, educati on programs professional skilled and technical sciences office of career, technical and adult education nevada department of education. Entrylevel welders are employed in a wide range of industries that use welding and welding related tasks. Applying shielded metal arc welding smaw techniques. Smaw welding, which stands for shielded metal arc welding, is one of the worlds most popular welding processes. Identify and explain openroot vgroove pipe weld techniques with smaw equipment. Smaw pipe welding is the most common method used in pipeline welding and is the basis used for developing the skills required in the other pipe welding processes. It is the primary type of welding used in the maintenance and repair industry. Develop your own style by observing others, practicing and noting which techniques produce the best results. In here will be share about what is shield metal arc welding, stick welding machine parts, electrode, stick welding technique, smaw welding parameter, polarity ac dc in smaw welding, and other. Depending on the type shielding gas, this process is of also known as co. Lesson a56 applying shielded metal arc welding smaw techniques unit a.
This subject is very complicated and only these precautions related to arc welding will be discussed in this brochure. Parttime pathway to success school of manufacturing, engineering, and information technology welding 314421 technical diploma effective 20202021 the course sequence shown on this sheet is the recommended path to completion. Describe the procedures and techniques for shielded metal arc welding. The essential factors in gas shielded metal arc welding states specific technologies needed to accomplish gsmaw successfully, focusing on the welding procedures in which solid wires and fluxcored. Attending fullday, you can complete the program in two semesters, while. If you need to use a work clamp, make sure to place it as close to the area being welded as safety permits. Welding research characterization of welding fume from smaw. The shielded metal arc welding ii smaw unit is designed to teach the student the correct techniques to weld in the vertical up and overhead position. Welding may be viewed as an ancient art, but the science of shielded metal arc welding and other welding processes is relatively new. As an alternate, you might consider using 716 or 38 studs, but more of them, and make your holes 16 or 34 to allow the required 316 fillets.
In general, the operator factor, or the percentage of the operators time spent laying weld, is approximately 25%. Only, i would make your holes 1 to allow the full 14 fillet all around, and still tie in the sheet decking. Five steps to improving your stick welding technique. Welding resources, guides and calculators millerwelds. Prepare smaw equipment for openroot vgroove pipe welds. Shielded metal arc welding smaw operation requires a setup and then weld. Unless rendering the text of the svg file produces an image with text that is incurably unreadable due to technical limitations, it is highly recommended to change the paths back to t. The modified short arc gmaw techniques offer a number of advantages over the conventional welding methods gmaw, gtaw and smaw when welding root passes from a single side without backing due to. This installation, operation, and maintenance of arc welding equipment and the.
History of welding the art of welding is an ancient one but the science of shielded metal arc welding is relatively new. Shielded metal arc welding employs the heat of the arc to melt the base metal and the tip of a consumable covered electrode. Each welder manipulates the electrode a little differently. Fulltime pathway to success school of manufacturing, engineering, and information technology welding 314421 technical diploma effective 20202021 the course sequence shown on this sheet is the recommended path to completion. Describe how to select shielded metal arc welding equipment and supplies. Fume generated by the shielded metal arc welding smaw process may be a cause for concern due to possible health problems experienced by individuals in the welding industry after longterm exposure. Practice and training in the welding shop will develop the basic skill level necessary to produce quality welds in these positions using lap joints and tee joints. Mission statement for certificate of accomplishment, shielded metal arc welding smaw. Course work includes a comprehensive study with an emphasis on application of fundamental welding techniques and.