Strictly observe the safety rules and precautions to ensure the safety of gas cutting operations. Ensure sufficient ventilation for gas cutting to prevent the air from becoming state. 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 oxyfuel gas torch often called a blowpipe is a very powerful source of ignition. On this episode he goes over the set up and operation of the torch itself. This is why we use pressure regulator so that to reduce the pressure to be used at the best pressure at the cutting torch. 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. Apr 16, 2017 gas welding is a most important type of welding process. When youre done cutting limbs, feel free to move on to other duties around the yard. Numerous types of additional auxiliary equipment are available to improve the overall cutting operation. Abstract laser cutting is an energy based unconventional process is an advanced machining process. Check to see that the system was properly shut down before starting. If sparks are spraying up from the workpiece, you are moving the torch too fast, or without sufficient power. The procedure is rather simple, but doing it really well is often as much of an art as science. This flame directly strikes the weld area and melts the weld surface and filler material.
It is done by burning of fuel gases with the help of oxygen which forms a concentrated flame of high temperature. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. From the start of opening your bottles up to adding in the oxygen. These hazards primarily consist of toxic fumes, dusts, burns, fires, explosions, electric shock, radiation, noise, and heat stress. Ensure that there are no combustible materials in the area that could be ignited by the sparks or slag produced by the cutting operation. Alfa laval has a long history of helping coke producers meet their challenges with our solutions for heat transfer and separation. Like the cutting outfit, the minimum welding outfit consists of the following parts. This versatile tool is used for operations, such as bevel ing plate, cutting and beveling pipe, piercing holes in. Welding and cutting equipment left outside space 4. This is especially important if the designed cut begins by piercing. Oxyfuel welding, heating and cutting concoa gas pressure. Gas oxyfuelcutting gas weldinggas regulator one stage two stage. Theres not much effort to it when cutting, meaning that you dont have to place too much strength into it when the machine is in operation. The cutting speed is primarily determined by the oxygen jet but as the outer fuel gasoxygen flame determines the rate of preheating, the choice of fuel gas has a significant influence on the time taken to initiate the cutting operation.
Backfires and flashback safety tips rls human care. Awaiting your valuable commentssuggestionsqustions towards improving safety in gas cutting operation and their. The accidents happening during these processes are very typical and involve the. A flashback flame arrestor is a device that prevents the propagation of a flame upstream. Oxygenacetylene welding, or gas welding, is a process which relies on. Operators and supervisors must keep safety in mind. It is based on the chemical relationship of oxygen to iron metals. Gas welding and cutting process are common in many engineering factories. When kinetic energy in a gas is increased, some of the electrons are freed from the atoms outer shell and a plasma is formed. Check valves and flashback arrestors are safety devices for protecting workers using oxyfuel cutting and welding equipment. Fundamentals of gas cutting and welding cedengineering. Wear proper clothing and personal protective equipment ppe. Installation and operation of oxygenfuel gas systems for welding and cutting 1910. Rapid oxidation of the steel takes place and material is removed by the pressure of the gases.
At the end of the discharge process in the screw, no clearance volume remains. Fundamentals of gas cutting and welding ced engineering. This booklet provides safety and health information on oxyfuel gas welding, cutting, heating, and allied. Flame cutting requires a careful balance of cutting. Oxyfuel welding, heating and cutting process manual installation and operation instructions before installing or operating, read and comply with these instructions controls corporation of america 1501 harpers road virginia beach, va 23454 to order call 18002250473 or 7574228330 fax 7574223125 april 2001 supersedes. Laser cutting indian institute of technology bombay. Also, it is dangerous to use cutting torches in higher pressure than needed. Type of appliance temperature controlled continuous flow gas hot water system. The oxyacetylene and other oxyfuel 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. Portable automatic gas cutter manufacturer of cutting. Electrodes removed from holders andor gas supply shut off when operations are suspended for any substantial period 5. Oxyfuel cutting ofc is similar to ox fuel welding except that.
Operation hand torch cutting technique firing the torch unnecessarily reduces nozzle and electrode life. Careless use of oxyfuel torches has caused many fires. Tankless water heater operation and installation manual. Oxygen and fuel gas cylinders stored separately with protective value caps in place 2. Liquefied gas cutting is similar in principle to water jet cutting, except that the carrier medium is a liquefied gas. The oxyfuel process is the most widely applied industrial thermal cutting process because it can cut thicknesses from 0. Cutting processes application of oxyfuel cutting twi. Oxyfuel 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. This leaflet is for people who use compressed gases for welding, hot. Basics of operation and application of oil flooded rotary screw compressors 149 figure 6. The energy input into the gas has to be ongoing otherwise the gas will eventually cool enough that the electrons will mate back with the ionized atoms. Safety in gas cutting operation pdf download citehr. In addition, oxyfuel cutting is still widely used, both in heavy industry and light industrial and repair operations.
The perceived advantages of this method include lack of a secondary waste stream, favourable economics, and the absence of. Gas cutting the common methods used in cutting metal are. Welding, cutting, and brazing checklist for general industry a negative answer to any question indicates an area of safety or health concern. Cutting with the oxyfuel process is just the opposite from of welding. Y does each operator have a copy of the appropriate operating instructions and are they directed to follow them. Safety and health at work for gas welding and flame cutting 2 1.
Hypertherm powermax600 operators manual pdf download. In addition, oxyfuel cutting is still widely used, both in heavy. Cutting operation with high speed a steady and safe cutting operation cutting with efficient gas consumption to achieve the above criteria and conditions a koike tip must maintain superior oxygen cutting flow and an efficient yet, uniform preheat flame. Upon completion of a welding, heating, or cutting operation, immediately inspect the surrounding areas for smoldering embers. These recommended practices for oxyfuel gas cutting include the latest procedures to be used in conjunction with oxyfuel gas cutting equipment and the latest safety recommendations. The melted part of welding plates diffused in one another and create a weld joint. Apr, 2010 how to cut metal with an oxygen and acetylene torch. This is just a basic overview of how to use an acetylene torch to cut metal. In oxy fuel gaswelding processes, the combustion takes place in two stages. Do a quick visual inspection of the hoses and equipment. Figure 41 typical oxygas cutting outfit cutting rig. We provide heat exchangers for the most demanding duties involving. Injuries are in the form of eye injuries, infections, burns and due to lifting, slips, falls, and dropped or falling objects during the process.
Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Safety in gas welding, cutting and similar processes hse. When this happens, the plasma returns to a gas state. Opening and closing procedures on gas cutting equipment. To be suitable for welding operations, a fuel gas, when burned with oxygen, must have the following. Ensuring reliable operation of your coke oven gas plant is more important than ever in securing a stable supply of clean fuel for your steelworks. Opening and closing procedure gas cutting equipment set the correct working pressures with the gas flowing. Never cut pressurized cylinders or hermetically sealed containers. Y are compressed gas cylinders regularly examined for obvious signs of defects, deep rusting, or leakage235ii y is care used in handling and storage of cylinders, safety valves. Transporting, moving, and storing compressed gas cylinders. The power density on the cutting front is fsin this causes melting which is then blown away by the drag forces from the fast flowing gas stream. Cylinder of acetylene or mapp gas cylinder of oxygen two regulators two lengths of hose with fittings torch with welding tips figure 51 typical oxygas welding rig similar to oxygas cutting rig.
Gas cutting of ferrous carbon steel metals gas cutting is a process of preheating carbon steel to its combustion temperature, then burning it rapidly by means of a regulated jet of oxygen. Approved gas type natural gas or propane ensure unit matches gas type supplied at the installation location. Precautions and safe practices for gas welding, cutting. Welding, cutting, and allied processes supersedes ansi z49. Location and use of the fire alarm required personal protective equipment ppe 1. All compressed gas is pushed out the discharge ports. Safe operating procedures sop 15 oxy acetylene cutting. Operation with or without temperature controller, mounted in kitchen, bathroom, etc. Gas welding is a most important type of welding process. It works well work most tree species, including oak and pine trees.
Each nozzle is designed to operate at specific pressures too high pressure wastes gas and can cause malfunctions. After all its about the quality of the entire fitting contour to reduce fitting and welding time. 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. Aug 07, 2017 on this episode he goes over the set up and operation of the torch itself. A check valve is a device that is designed to prevent the unintentional backflow of gases. Safety in gas welding, cutting and similar processes page 4 of 11 explosion when cutting up or repairing tanks, drums and tyres figure 2 cutting up scrap if a welding blowpipe or burner is used on a tank or drum containing flammable material solid, liquid or vapour, it can explode. The oxyfuel process utilizes a flame to generate heat for cutting, welding and brazing. The objective of this paper is to provide a state of the art in the field of laser cutting process. The area should be cleared for a radius of 35 feet. But there is lack of adequate awareness of the hazards.
Too low pressures may cause instability now check your equipment for leaks using a solution of. Safety in gas welding, cutting and similar processes page 4 of 11 explosion when cutting up or repairing tanks, drums and tyres figure 2 cutting up scrap if a welding blowpipe or burner is used on a tank or drum containing flammable material solid, liquid or vapour, it can. Awaiting your valuable commentssuggestionsqustions towards improving safety in gas cutting operation and their by knowledge upgrading. Safety in gas welding, cutting and similar processes. At the bottom of the kerfthe melt is thicker due to deceleration of the film and surface tension retarding the melt from leaving. Care must be taken to avoid the contact of the flame with any combustible.
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