It is the only gas mixture hot enough to melt steel. This document is not an application manual and does not contain a complete statement of all factors pertaining to that topic. Working pressure limits for welding hose is 200 psig maximum. Oxyacetylene torches can be used for a variety of processes, and is one of the many things that can be used to weld aluminum. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. Oxy fuel welding ofw published on march 25, 2020 november 26, 2019.
It is not intended as a comprehensive manual, nor does it contain the scope of information needed for commercial or industrial welding purposes. Open regulator oxygen and acetylene, set until the pressure matching with what do you want or for acetylene 5 to 7 psi and oxygen 7 to 10 psi. There are three main techniques used in oxyfuel welding. The first we must clean the nozzle, because if the head of the nozzle dirty will cause flame bad. Experience gained from user contact and welding training of crewmembers showed that. Vause, who spent many years as a welder and several as welding instructor at qe college for. Oxy acetylene welding is a welding process manually, in which the surfaces to be joined, which is warming to melt by a gas flame oxyacetylene with or without filler metal, where the connection process without emphasis. A stepbystep guide welding is a delicate art, but once you learn it, ordinary steel becomes a blank canvas for invention. Open the valve on the acetylene cylinder no more than threefourths of a turn so it can be closed quickly in case of emergency.
Arc welding is a process that uses an electric arc to join the metals being welded. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. In order to discuss the various aspects of welding, cutting and brazing safety, first we need to cover the basics in this first module. The high temperature flame melts the metal faces of the workpieces to be joined, causing them to flow together. Temperatures from the combustion of oxygen o2 gas and ethyne, or acetylene c2h2 gas can reach 3,340 degrees celsius, which is. The two gasses are controlled by separate knobs, and are mixed inside the torch body. This book contains chapters from introduction to welding, gas and thermal. A welding torch is used to mix the gases in the proper proportions and to direct the flame against the parts to be welded.
Chapter 3 introduction to welding in the navy as well as private industry, welding is widely used by metalworkers in the fabrication, maintenance, and repair of parts and structures. At this point, the gas welding rod copper coated steel is dipped into the puddle. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting, and hard facing. Once you learn the basics of gas welding, you will find the oxy fuel process adaptable to brazing, cutting, and heat treating all types of metals. Oxy acetylene welding ofw fundamentals pressure settings. Basic oxyacetylene welding by griffin, ivan h and a great selection of related books, art and collectibles available now at. One thing particularly helpful is the american welding society terminology details that are indexed throughout the book. I save my most favorite metal working tool until the end. A mixture of oxygen and acetylene, burns as an intense focussed flame, at approximately 3,500 degrees centigrade. Oxyfuel gas cutting and welding operation of oxyfuel torches involves oxygen and flammable gases under pressure, open flames, flying slag and hot metal, meatl fumes and combustion products. Oxyacetylene welding oaw oaw is a manual process in which the welder must personally control the the torch movement and filler rod application the term oxyfuel gas welding outfit refers to. This process involves mixing oxygen with acetylene which produces a flame that burns very hot. Air products welders handbook fusion welding the most widely used welding processes rely on fusion of the components at the joint line. A distinct advantage of arc welding over gas welding is the concentration of heat.
Oxyacetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major welding gases. In order to comfortably and safely see the flame when welding or cutting, welding goggles must be worn. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Now open both cylinders valves no specific order but only open the acetylene tank about a 12 turn, the oxygen should be opened all the way.
When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Beginners, especially, are advised to avoid apparent short cuts, which are liable to prove costly when not used by a welder of judgment and experience. A practical manual of oxyacetylene welding and cutting with a treatise on acetylene and oxygen, by p. Oxy acetylene welding was developed and used from the mid to late 1800s. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. Welding 5 psi acet5 psi oxy cutting 5 psi acet20 psi oxy. A comprehensive treatise on the practice of welding cast iron, malleable iron, steel, copper, brass, bronze, and aluminum by the oxyacetylene methods, together with concise information on the equipment required for both welding and cutting by this process volume 12 of machinerys mechanical library.
Oxyacetylene welding set up and pressure settings chart. It is an invaluable aid to industry as well as in schools and universities. Gap wirea wire used for correct spacing of butt joints. In fusion welding or non pressure welding, the material at the joint is heated to molten state and allowed to solidify. Oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by. Welding, cutting, and brazing welding is a process that joins materials together by melting a metal work piece along with a filler metal to form a strong joint. Welding by oxy acetylene or electric arc, is a skill in increasing demand and one of which the basics can be learned without great difficulty. However, it is still widely used for a variety of applications. Oxyacetylene gas welding and related studies, second edition covers the ground necessary for the acquisition of the essential basic skills and safe working methods and sufficient technology in oxyacetylene gas welding and related studies. More hot tips always use an approved friction striker, never use matches or a cigarette lighter. 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.
Fundamentals of gas cutting and welding cedengineering. The same type of oxyfuel welding apparatus is used in all cases, but the torch welding tip size could be changed depending on the amount of btu heat output. The torch for oxyacetylene welding is a precisionmade tool, usually constructed with a forged brass body, two knobs controlling the gas flow, and copper tips of varying size see illustration. It is clarified that this handbook does not supersede any existing instructions. A welding rod is a piece of wire that joins a current from a wire to the welding machine itself. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene. Gas welding and cutting oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. In other words, its a wire joining the welder with the materials youre fusing together. In fusion welding, a heat source melts the metal to form a bridge between the components. However, unlike these, oxyacetylene, or arc welding, is much more widely used since. This is a used book in good condition which shows light to moderate amount of wear.
Heating tip uses a tremendous amount of oxygenacetylene. The science and practice of welding download ebook pdf. Fundamentals of gas cutting and welding ced engineering. Click download or read online button to get the science and practice of welding book now. Manual oxyflame cutting of a round hole or disc can be made easier using a radius bar. Members and leaders be sure to check your project books for the project completion. If you are not familiar with the safety practices, procedures and techniques of basic welding, you will need to supplement this guide with. It may show signs of previous use to the cover andor spine. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. Oxygen acetylene welding, or oxy acetylene welding, is a process for joining metals that was introduced in 1903 by thomas wilson. Oxyacetylene welding o 2, c 2h oxyacetylene welding is a gas welding process. The oxyacetylene flame produces an intense bright light that causes discomfort and possible injury to the eyes. Oxyacetylene welding of pipe is accomplished by one of three techniques.
The beginners guide to different types of welding rods. Do not open acetylene cylinder valves more than 1 turn 14 to is usually enough. This welding on the web box will appear throughout the manual. This site is like a library, use search box in the widget to get ebook that you want. May be a nice, clean xlibrary book with the usual stamps or a previous owners name. This book will highlight the welding and cutting processes. Welding manuals stick mig tig oxy acetylene plasma.
Gas flame the molten metal must be protected from the atmosphere absorption of. Other welding techniques that are effective for aluminum include tig tungsten inert gas welding and mig metal inert gas welding. Oxygen acetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Two of these techniques are used to weld flat joints and one is used for allposition welding. Oxy acetylene welding uses high pressure gas cylinders that contain the two gases oxygen and acetylene. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. The oxyacetylene welding process uses a combination of oxygen and acetylene gas to provide a high temperature flame. Every effort has been extended in the preparation of this book to make it a textbook on the manual application. Video an introduction to gas welding oxyacetylene oxyacetylene gas welding is commonly used to permanently join mild steel. Oxyfuel welding ofw is a group of welding processes that join metals by heating them with a fuel gas flame or flares with or without the application of pressure and with or without the use of. First close the acetylene knob all the way until the flame is extinguished. The flame heats the base metal to its fluid or puddle state. The oxyacetylene handbook is a basic handbook or manual on oxyacetylene welding and cutting and their related processes.
A guide to plasma cutting, oxyacetylene, arc, mig and tig welding minimization of welding distortion and buckling. I mentioned earlier that if youre mig welding with flux core wire, or stick welding, youll have to chip away at the slag coating to reveal the weld underneath. This process can be done with or without help of filler material. In this process, mostly oxyacetylene gas is used as fuel gas. In this process coalescence or bond is produced by heating with the gas flame obtained from the combustion of acetylene with oxygen. Basic oxyacetylene welding basic welding techniques. Relevant sketches are given wherever required to make the subject interesting. How to operate an oxyacetylene cutting torch snapguide. Oxyacetylene welding oaw the oxyacetylene welding process uses a combination of oxygen and acetylene gas to provide a high temperature flame. Gas welding is still used for side of metal, cut by oxygen propane cutting.
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