Only mild steel and some low alloys meet the above conditions and can be cut effectively with the oxy fuel process. It is for people who use acetylene for welding, cutting and similar processes. 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. Compressed gas cylinders themselves are potential hazards if they are improperly handled. Auto ignition auto capacitive height control long tip life quick change tip technology auto gas oxy fuel gas system precise control of gas manifold pressure. What welding attachment to choose depend on plate thickness wall thickness if pipe. Do not smoke or allow anyone else to smoke near the oxy fuel gas welder. Gas turn on acetylene gas first and light it before turning oxygen on refer to operating instructions gas hoses to be well clear of weld splatter at all times ensure weld area is well ventilated operator to be aware of proximity of a fire extinguisher ensure weld torch valves and gas regulators are. Coverts a single oxy fuel cutting torch into dual cutting torches. Today, a high electricaloptical efficiency can be achieved with. Follow the manufacturers recommendations for the correct operating pressures for the metal being welded and for the tip size being used.
Never perform welding, cutting, and heating operations on a container that has held toxic or combustible liquids or vapors. Portable oxy fuel gas equipment, march 2007 page 11 of 12 further information alerts and guidance notes worksafe guidance note elevating work platforms and the placement of gas cylinders for cutting or welding. French engineers edmond fouche and charles picard became the rst to develop oxygen acetylene welding in 1903. This course content is in the following pdf document. Be skeptical of claims made by proprietary fuel gas suppliers for hotter flame temperature, faster. Little to no slag on bottom edge easily removed by scraping elements of oxy fuel cutting preheat flame oxygen stream. Buy your welding and cutting kits online from boc today. Cutting attachment for an oxyacetylene cutting torch. However, if errors are found, please report them to email protected. The preheat flame is composed of fuel gas and oxygen at a proper mixture ratio to produce maximum flame. Keep torch flame or sparks away from cylinder, regulator, and gas hose.
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. When using oxy acetylene a special torch or cutting blowpipe is necessary. Pdf frequently asked questions portable oxyfuel gas. Be skeptical of claims made by proprietary fuel gas suppliers for hotter flame temperature, faster cutting speed or better cut quality.
Combustion requires fuel, oxygen, and heat, and as an operator, you need. It is acceptable to use acetylene regulators that indicate a static pressure up to 22 psi 151 kpa. A stream of oxygen is then trained on the metal, burning it into a metal oxide that flows out of the kerf as dross. Opening and closing procedures on gas cutting equipment. Oxy acetylene welding and cutting pdf download full. Fundamentals of gas cutting and welding cedengineering. The next step in oxyfuel cutting from the market leaders.
Hull maintenance technician page navigation 217 218 219 220 221 222 223 224 225 226 227. For storage in excess of 2,000 cubic feet 56 m 3 total gas capacity of cylinders or 300 5. To secure a neutral flame, always start with an excess of acetylene, then increase the flow of oxygen or decrease the flow of acetylene until the acetylene feather disappears from the center cone. Safety in gas welding, cutting and similar processes page 5 of 11 fireexplosion caused by gas leaks acetylene, lpg and other fuel gases are highly flammable, and form explosive mixtures with air and oxygen. Clean smooth surface with near vertical drag lines, and 5. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Cutting speed on a thin plate less than or equal to 12 is controlled. Hose for oxy fuel gas service shall comply with the specification for rubber welding hose, 1958, compressed gas association and rubber. Oxy acetylene cutting safety in agriculture osha standard 1910. Oxy acetylene cutting can be used to cut thicknesses from 28. Oxy acetylene 308353 oxy acetylene nz 308356 oxy lp gas 308358 oxy lp gas nz 308361 iso as 4267 9001 comet custom kit 4 comet starter kit for those just starting out, or who require the basic components for oxy acetylene gas cutting and welding, the cometstarter kit is the ideal option.
The next step in oxy fuel cutting from the market leaders. Mobile oxy acetylene propane units operators should always follow the manufacturers instructions for the specific equipment in use. Safety in gas welding, cutting and similar processes hse. Do not open suddenly or there may be serious damage to the regulator and the possibility of an accident. After checking, close the cutting attachment again. Inspection of portable and oxy fuel gas systems central. Acetylene is the primary fuel for oxy fuel welding and is the fuel of choice for repair work and general cutting and welding. Pdf oxyfuel welding and cutting sewalem gezie academia. Pdf oxyacetylene handbook by linde air products company. Boc masterstart cut is a quality flame cutting gas kit for general purpose oxy acetylene cutting. No welding or cutting shall be performed on an acetylene or oxygen pipeline, including the attachment of hangers or supports, until the line has been purged. For the song, see welding, oxy welding, or gas welding in the u. Oxyfuel gas equipment has many uses welding, cutting, heating, straightening.
An excess of acetylene is easy to spot, but an excess of oxygen is difficult to spot except that it will cause molten metal to spark excessively. Oxy fuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxy fuel cutting. In this unit you will be introduced to oxy acetylene welding and the safety precautions required when using oxy acetylene equipment. As a welding torch, the basic operation of an oxyacetylene unit is blending two gases, oxygen. 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. Basic gas welding and cutting department of training and. Allows strip cutting and a closer distance between small parts. Here are a few facts and tips to keep our employees safe when using an oxy fuel gas cutting torch. The safe use of oxy fuel gas equipment issue 4 the safe use of oxy fuel gas equipment issue 4 further information. Oxygen acetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Setup and shutdown procedure for oxy fuel cutting torch. The cutting torch uses compressed oxygen and acetylene to cut metal.
Check the area that you are working in for combustibles and make sure that you have a fire extinguisher within 9 meters of a cutting torch operation. Oxy fuel welding and cutting oxyacetylene redirects here. Oxygen and acetylene use and safety virginia department of. This leaflet describes the hazards associated with portable oxy fuel gas. Oxyacetylene cutting process questions answer the following questions. Introduction to gas welding and cutting a pdh online. Working safely with acetylene page 1 of 5 introduction this leaflet provides guidance on the fire and explosion hazards of acetylene. Because steel melts at a temperature of 1500 degrees centigrade the mixture of oxygen and acetylene are used as it is the only gas combination with enough heat to weld steel. The oxy acetylene handbook is a basic handbook or manual on oxy acetylene welding and cutting and their related processes. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Cast iron and stainless steel require special procedures and even then a flame cut edge of the same quality as with plain carbon steel is difficult to obtain.
Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. In this unit you will be introduced to oxy fuel cutting and the safety precautions required when using oxy fuel cutting equipment. With the help of this document defects occurring during flame cutting can be. However, other gases such as propane hydrogen and coal gas can be used for joining lower melting points of metals and for brazing and silver soldering. Proactive gas safety training proactive gas safety training. This document has been prepared by boc limited abn 95. Oxy acetylene, commonly known as oxy fuel, is one of the. Oxyacetylene cutting safety in agriculture osha standard 1910. Gas cutting and welding kits from boc are a complete and convenient solution to get you started on your welding and cutting applications. Generally, hc gases are used as fuel gas in oxy fuel gas cutting. Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape. Any gas under pressure is dangerous and must be handled with due care and attention.
Equipment and tool safety topic page, shop safety topic page. In addition, oxy fuel cutting is still widely used, both in heavy industry and light industrial and repair operations. The spark lighter is used to ignite the oxy acetylene mixture at the tip of cutting torch. It is an invaluable aid to industry as well as in schools and universities. The other equipments serves the same function as in case of oxy acetylene gas welding. 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. Jul 21, 2020 oxy acetylene handbook by linde air products company. No change required when altering fuel gas, other than the type of tip, hose and regulator required. Check to make sure acetylene is supplied to the cutting attachment, and to make sure the acetylene is still at the acceptable level. Pure oxygen, instead of air, is used to increase the. Open the fuel gas cylinder valve completely to seal the cylinder back seal packing.
Video transcript oxy fuel cutting 1 the content within this transcript has been created utilizing a thirdparty software company which complies with all federal accessibility laws and international standards for web accessibility, providing a measured accuracy rate of 99. Harold phillips manly is a rare manuscript, the original residing in some of the great libraries of the world. Oxyfuel cutting and your safety american torch tip. The oxy acetylene flame is made by mixing oxygen and acetylene gases in a. The chemical action of the oxy acetylene flame can be adjusted. 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. The leaflet does not cover fixed installations where acetylene is used see. Use only acetylene or propane gas and oxygen with this equipment. For complete combustion of one unit volume of acetylene, 2. Step checklist can be used as a quick reference tool when setting. Comet blowpipes cutting attachments and consumables. Oxy fuel cutting is a chemical reaction between pure oxygen and steel to form iron oxide. Gas turn on acetylene gas first and light it before turning oxygen on refer to operating instructions gas hoses to be well clear of weld splatter at all times. See torch and cutting nozzles section beginning on page 15.
Opening and closing procedure gas cutting equipment copper piping welding brazing objective on completion of this element you will be able to join pipes in the downhand position, by means of the recognised oxy acetylene silver soldering and copper joining methods. When checking the acetylene, it is best to do it quick so that you are not letting the extra gas out and causing a fire explosion hazard. If the oxy welding cutting equipment is to be operated in a dangerous or hostile environment, the. To begin oxygen acetylene welding or cutting, open the cylinder valves slowly by means of the cylinder keys.
Check oxy fuel system for leaks with an approved leak detection solution or leak detector. Oxy fuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the united states and oxy fuel cutting are processes that use fuel gases or liquid fuels such as gasoline and oxygen to weld or cut metals. Oxy acetylene welding and cutting pdf download full pdf. Mixer 574 is an injector mixer design for oxy lp gas or oxy natural gas and used for heavy duty high flow applications. Use the following internet link to find the answers.
Safety in gas welding, cutting and similar processes. However, it is still widely used for a variety of applications. Open the fuel gas control valve on the blowpipe and adjust the. Liquid petroleum cylinders are painted aluminium and have lefthand threads. Mediumduty oxyacetylene cutting and welding outfit 770 502. Cutting practice 90 oxy acetylene 92 oxy propane 93 data tables 96 cautionary note 101 104485 saffire a5 112pp txt pages 171008 12. This book will highlight the welding and cutting processes. Controls in oxy fuel cutting, a torch is used to heat metal to its kindling temperature.
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