In contrast to acetylene, gases such as propane and propylenes can require approx 200% more oxgen when cutting. By burning acetylene enriched by oxygen, the attachment and tip heat the metal to critical temperature. Heats metal via electric arc electrode is made of graphite and coated with copper for strength and conductivity. Welding torch or blow pipe with a set of nozzles and gas lighter. Oxy acetylene welding ofw fundamentals pressure settings. As 48392001 the safe use of portable and mobile oxyfuel. The acetylene shortage acetylene has been the cutting fuel of choice for oxy welding, brazing, and cutting because it reaches the highest possible temperature, provides clean, efficient cuts, and offers versatility. Smith regulators are available in economy and premium grades for hobbyists and pros. In addition, oxy fuel cutting is still widely used, both in heavy. Safety in gas welding, cutting and similar processes page 3 of 11 preventing fire from heat, sparks, molten metal or direct contact with flame the flame from an oxy fuel gas torch often called a blowpipe is a very powerful source of ignition. In this unit you will be introduced to oxy fuel cutting and the safety precautions required when using oxy fuel cutting equipment. Oxyacetylene flame cutting is a relevant and widespread industrial process. Electric shock ensure the cables have proper insulation and connector as well as termination joints are safe for the purpose.
Gas welding and cutting oxy fuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. Safety in gas welding, cutting and similar processes. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene. Careless use of oxy fuel torches has caused many fires. How to properly light, adjust and shut down an oxy acetylene torch home. Turn on acetylene gas first and light it before turning oxygen on refer to operating instructions.
Welding, cutting and brazing student safety guidelines. February 2015 issue 2 pg 2 of 2 the instructions recommended within this document apply to normal risk conditions. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Flame cutting is used to make the edges of the work pieces and for sheet cutting films of metal from. Mechanism aws oac caca pac abbreviation s plasma arc cutting air carbon arc cutting oxyacetylene cutting process name. The oxyfuel process is the most widely applied industrial thermal cutting process because it can cut thicknesses from 0. The specific personal protection equipment ppe required will depend on the type of hot work being performed. In modern steelage the steelmakers cut iron and steel by oxy acetylene, oxy hydrogen, oxy propane, oxy natural gas cutting blowpipes easily, speedily, and cleanly. Module 2 thermal processes unit 1 introduction to thermal processes and safety unit 2 introduction to oxy acetylene welding unit 3. Propane, propylene, or oxy acetylene, welders supply has a regulator for your rig. Video for my high school students to follow as they learn the process of using the oxy acetylene torch oxy acetylene welding1.
At this point, the cutting oxygen lever is depressed, delivering a stream of oxygen that cuts. Tip size numbers vary among manufacturers, so orifice sizes are shown in number drill. Contents 4 the school of the art institute of chicago 6. However, before learning about the equipment, you must be familiar with the gases most often used to fuel the cutting equipment. This book will highlight the welding and cutting processes. While most welders would prefer to continue using acetylene for their oxy. Check oxy fuel system for leaks with an approved leak detection solution or leak detector. Oxy fuel cutting is a thermal cutting process that uses oxygen and fuel gas such as acetylene, propane, mapp, propylene and natural gas to cut through materials. Fundamentals of gas cutting and welding ced engineering. C2h2 heat valve primary flame 19 mjcm secondary 36 mjcum. The spark lighter is used to ignite the oxy acetylene mixture at the tip of cutting torch. Oxy fuel cutting can be very intimidating to students and inexperienced welders.
Locate the emergency stop switch for immediate power isolation. How to cut metal with an oxy acetylene cutting torch. Mediumduty oxyacetylene cutting and welding outfit 770 502. This video will give you an indepth lesson on how to.
The preheat flame is composed of fuel gas and oxygen at a proper mixture ratio to produce maximum flame. The safe use of portable and mobile oxy fuel gas systems for welding, cutting, heating and allied processes 1 scope this standard specifies selection, operation and maintenance procedures for oxy fuel gas handheld or portable equipment used in welding, cutting, heating and allied processes. It is manufactured by the chemical reaction between calcium carbide, a gray stonelike substance, and water. Hobart is registered to the iso 9001 quality system standard. Learn more about oxy fuel gas cutting ofc including tips on when to use the ofc process, the equipment needed for this type of cutting, and limitations of ofc. The cutting attachment hooks up to the torch handle and holds the cutting tip. Look at how much cuft oxygen is required per lb of fuel gas. Tables show approximate gas pressures for welding or cutting. Ransome has designed the plateproxhd to provide excellent thermal cutting at an affordable price. The other equipments serves the same function as in case of oxy acetylene gas welding. For example, cutting with an oxy acetylene torch will require a different type of eye protection than would shielded metal arc welding smaw. The fuel gas commonly acetylene, when mixed with proper proportion of oxygen in a mixing chamber of welding torch, produces a very hot flame of about 57005800f. Manly its easy to link to paragraphs in the full text archive if this page contains some material that you want to link to but you dont want your visitors to have to scroll down the whole page just hover your mouse over the relevent paragraph and click the bookmark icon that appears to the left of it.
Cutting table and iht cutting torch optional koike aronson inc. The oxy acetylene and other oxy fuel gas mixtures welding torch remains a mainstay heat source for manual brazing and braze welding, as well as metal forming, preparation, and localized heat treating. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting, and hard facing. The tool you use for oxy acetylene cutting is called a. How to properly light, adjust and shut down an oxy acetylene torch. Oxy fuel welding and cutting the oxyfuel system is an auxiliary technique to welding developed since 1903 and used to date in many industrial applications. Oxy acetylene cutting is a gas flame cutting process to separate metal sheets. Setup and shutdown procedure for oxy fuel cutting torch. Safe operating procedures sop 15 oxy acetylene cutting. 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. The company was formed in 2006 with the merger of harris calorific, inc. Liquid petroleum cylinders are painted aluminium and have lefthand threads.
The separation is done by heating the surface of the material over melting temperature and burning it through the supply of additional oxygen. Inspection of portable and oxy fuel gas systems wi37. Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. Oxy fuel cutting oxy fuel cutting uses a flammable gas, generally acetylene or propane. This automated dual side drive, plasmaoxy fuel cutting machine is cost efficient and is manufactured in the.
Some of our more popular gas welding and cutting equipment includes. Converting from acetylene to alternative fuels bakers. The resulting liquid metal slag is blown out by the cutting stream. Check to make sure acetylene is supplied to the cutting attachment, and to make sure the acetylene is still at the acceptable level. Oxy acetylene welding oxy acetylene, commonly known as oxy fuel, is one of the. Follow the precautions in this safety section and those throughout this manual for your personal safety and the safety of people near the equipment. Acetylene gas regulator should be set to deliver only 10 psi o close both oxygen and acetylene fuel gas cylinder valves o turn adjusting mechanism counterclockwise one. Mixer, tips and nozzles for use with lpg are stamped p propane and must not be used with acetylene. Oxy fuel cutting is a chemical reaction between pure oxygen and steel to form iron oxide. It is the only gas mixture hot enough to melt steel. Oxy fuel gas cutting and welding operation of oxy fuel torches involves oxygen and flammable gases under pressure, open flames, flying slag and hot metal, meatl fumes and combustion products.
Nitrogen oxide nox gas is released through a reaction of nitrogen and oxygen promoted by high heat andor uv radiation. Fundamentals of gas cutting and welding cedengineering. The chemical action of the oxy acetylene flame can be adjusted. Accessory accessory processes oxy fuel welding and cutting. Keep torch flame or sparks away from cylinder, regulator, and gas hose. Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape.
This video will give you an indepth lesson on how to setup and break down your rig. Oxy acetylene cutting safety in agriculture osha standard 1910. Use only acetylene or propane gas and oxygen with this equipment. Open the fuel gas control valve on the blowpipe and adjust the regulator to give the correct working pressure see chart on page, this ensures that any air or. Note the oxy requirements for the different fuel gases. Oxy fuel cutting torches use a copper tip with a series of holes arranged in a circle to deliver a mixture of a fuel gas and oxygen to create a preheat flame. Burning the gas in oxygen, rather than just air, produces a flame with a high temperature. Goplus gas welding cutting torch kit, portable oxy acetylene oxygen brazing, professional tool set victor type wcase and hose.