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H Shane Ashby CSP with West Tennessee Healthcare in Jackson TNOSHA outreach training instructor A veteran ofmember of ASSEs Golden Circle ChapterwwwasseorgAPRIL2002 Welding Fumein the WorkplacePreve. NMTS seeks out the most qualified inspectors with excellent safety records and retains many outstanding inspectors on our permanent staff. We do a thorough background check on all inspectors prior to mobilizing them to a job site. INTRODUCTION. ELECTRIC ARC WELDING. The welding in which the electric arc is produced to give heat for the purpose of joining two . surfaces is . called electric arc welding. Principle. Power supply is given to electrode and the work. A suitable gap is kept between the work . INTRODUCTION.  . Robot Welding . is a process of joining different materials. . The . large bulk of materials that are welded are metals and their alloys although welding is also applied to the joining of other materials such as thermoplastics. Welding Metallurgy. Study of Welding Metallurgy is important because the overall-mechanical properties of a . weldments . are . determined . by the properties of individual microstructure present in the weld deposit and the weld heat . Tig and Mig welding. By: Luke Woroniecki. Table of Contents. Welding Certification and Qualification. Codes. Safety. Cutting Processes. Welding Processes. Weld Joint Geometry and Welding Symbols. Welding Metallurgy. nature OF WORK. - Welders. , cutters, . solderers. , and . brazers. held about 337,300 jobs in . 2010. -Welders will either work outdoors or in a confined space to contain sparks.. - They wear safety shoes, goggles, masks with protective lenses, and other equipment to protect from burns and falling objects. . T-joint. T-joint welded using arc welding. T-joint welded using . tig. T-joint welded using . mig. Lap joint. Lap joint welded using . tig. Lap joint welded using arc welding. Lap joint welded using . Duties . Welders join or sever metals in beams, girders, vessels, piping and other metal components, make metal parts used in construction and manufacturing plants, and weld parts, tools, machines and equipment.. Covered in Subpart H, but an integral part of welding, cutting and brazing. Compressed gases-hazards. compressed energy. flammable, asphyxiants, oxidizers. Gases are used for cutting, brazing and “shielding” the weld. Joining and Assembly. Joining . - . welding. , . brazing. , . soldering. , and adhesive bonding. These processes form a permanent joint between parts. Assembly - mechanical methods (usually) of fastening parts together. A Brief History of Welding. Late 19. th. Century. Scientists/engineers apply advances in electricity to heat and/or join metals (Le Chatelier, Joule, etc.). Early 20. th. Century. Prior to WWI welding was not trusted as a method to join two metals due to crack issues. . 29 CFR 1926 . – . Subpart . J. Presented by. : . ETTA. . Bureau, 919-807-2875. Objectives. In this course, we will discuss the following:. OSHA’s minimum requirements for:. Gas welding and cutting. OBJECTIVES. After completing this chapter, the student should be able to. understand the basics of joint design.. list the five major types of joints.. list seven types of weld grooves.. identify the major parts of a welding symbol.. How an arc is formed. The arc is like a flame of intense heat that is generated as the electrical current passes through a highly resistant air gap.. Arc welding process. Tungsten Inert Gas welding. Welding torch.