PPT-Welding Revision

LC Engineering Gas Welding Revision Stages of combustion Primary Combustion Acetylene amp Oxygen burn in the primary combustion zone to give off Carbon Monoxide and Hydrogen C2H2O2 2COH2. Established in 1993, NMTS is dedicated to serving every aspect of your contract quality inspection needs through experience and integrity. We help contractors around the nation fill much-needed temporary positions for certified welding inspectors. Welding. Welding processes are conveniently divided into two classes: . fusion welding and solid state welding. . . During fusion welding a portion of the base materials to be joined is melted and mixed, often with the addition of a filler metal, forming a solid joint after subsequent solidification. . 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 . History of Welding. Welding was used in the construction of the iron pillar in Delhi India, erected about 310 AD and weighing 5.4 metric tons. . History of welding. Welding, was transformed during the 19th century. In 1802, Russian scientist Vasily Petrov discovered the electric arc and subsequently proposed its possible practical applications, including welding.. About Us. Plastic Welding and Fabrication, Ltd (PWF) . started in 2003. . L. ike . most other small . businesses PWF started . working out . of a . garage. We have since moved twice . and currently has two buildings in Buda, TX.. Stanley High school shop. Safety Hazards in the Welding Shop include:. . - Flames, sparks, slag, harmful rays, fumes, and fire hazards. . - Always wear proper PPE in order to minimize risk . . of being affected by these hazards. . 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. Plasma Arc Welding. Solid State Welding . Radiant Energy Welding Process . Radiant Energy Beam focuses an energy beam on the work-piece. The heat is generated only when the energy . beam . strikes the work-piece. Radiant Energy beam includes . 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. . Definitions. Weld. A localized fusion of metals produced by heating to suitable temperatures. . Pressure and/or filler metal may or may not be used. . The filler material has a melting point . approximately . 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 . 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. T-Joint. T-Joint made by Arc welding. T-Joint made by MIG welding. T-Joint oxygen acetylene. Butt Joint. Butt Weld from Arc Welding. Butt welding using. Oxygen . A. cetylene . Butt Welding using . MIG Welding. . 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.