Gas cutting operation pdf

From the start of opening your bottles up to adding in the oxygen. All compressed gas is pushed out the discharge ports. Location and use of the fire alarm required personal protective equipment ppe 1. We provide heat exchangers for the most demanding duties involving. This versatile tool is used for operations, such as bevel ing plate, cutting and beveling pipe, piercing holes in.

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. The melted part of welding plates diffused in one another and create a weld joint. 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. Wear proper clothing and personal protective equipment ppe. When youre done cutting limbs, feel free to move on to other duties around the yard. This is just a basic overview of how to use an acetylene torch to cut metal. At the end of the discharge process in the screw, no clearance volume remains. Too low pressures may cause instability now check your equipment for leaks using a solution of. When cutting, make sure that sparks are exiting from the bottom of the workpiece. The perceived advantages of this method include lack of a secondary waste stream, favourable economics, and the absence of hazards from explosion, fire or oxidation. It is done by burning of fuel gases with the help of oxygen which forms a concentrated flame of high temperature. Flame cutting requires a careful balance of cutting. 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. 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.

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. 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. Liquefied gas cutting is similar in principle to water jet cutting, except that the carrier medium is a liquefied gas. Gas oxyfuelcutting gas weldinggas regulator one stage two stage. 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. 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. Electrodes removed from holders andor gas supply shut off when operations are suspended for any substantial period 5. 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. Operation with or without temperature controller, mounted in kitchen, bathroom, etc. But there is lack of adequate awareness of the hazards. Check to see that the system was properly shut down before starting. Oxygen and fuel gas cylinders stored separately with protective value caps in place 2.

The accidents happening during these processes are very typical and involve the. 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. This is why we use pressure regulator so that to reduce the pressure to be used at the best pressure at the cutting torch. Safety in gas cutting operation pdf download citehr. Hypertherm powermax600 operators manual pdf download. Type of appliance temperature controlled continuous flow gas hot water system.

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. Gas welding is a most important type of welding process. Oxygenacetylene welding, or gas welding, is a process which relies on. If sparks are spraying up from the workpiece, you are moving the torch too fast, or without sufficient power. Figure 41 typical oxygas cutting outfit cutting rig. Gas welding and cutting process are common in many engineering factories. The oxyfuel process is the most widely applied industrial thermal cutting process because it can cut thicknesses from 0. Operation hand torch cutting technique firing the torch unnecessarily reduces nozzle and electrode life. Never cut pressurized cylinders or hermetically sealed containers. Transporting, moving, and storing compressed gas cylinders. 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. This is especially important if the designed cut begins by piercing. When kinetic energy in a gas is increased, some of the electrons are freed from the atoms outer shell and a plasma is formed. Awaiting your valuable commentssuggestionsqustions towards improving safety in gas cutting operation and their by knowledge upgrading.

Approved gas type natural gas or propane ensure unit matches gas type supplied at the installation location. In addition, oxyfuel cutting is still widely used, both in heavy industry and light industrial and repair operations. Ensure that there are no combustible materials in the area that could be ignited by the sparks or slag produced by the cutting operation. Oxyfuel cutting ofc is similar to ox fuel welding except that. Backfires and flashback safety tips rls human care. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Laser cutting indian institute of technology bombay. Strictly observe the safety rules and precautions to ensure the safety of gas cutting operations. The objective of this paper is to provide a state of the art in the field of laser cutting process.

This booklet provides safety and health information on oxyfuel gas welding, cutting, heating, and allied. 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. 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. 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. Oxyfuel welding, heating and cutting concoa gas pressure. The perceived advantages of this method include lack of a secondary waste stream, favourable economics, and the absence of. Welding and cutting equipment left outside space 4. 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. Each nozzle is designed to operate at specific pressures too high pressure wastes gas and can cause malfunctions. It works well work most tree species, including oak and pine trees.

A flashback flame arrestor is a device that prevents the propagation of a flame upstream. Opening and closing procedures on gas cutting equipment. Check valves and flashback arrestors are safety devices for protecting workers using oxyfuel cutting and welding equipment. It is based on the chemical relationship of oxygen to iron metals. Fundamentals of gas cutting and welding ced engineering. Operators and supervisors must keep safety in mind. When this happens, the plasma returns to a gas state.

These hazards primarily consist of toxic fumes, dusts, burns, fires, explosions, electric shock, radiation, noise, and heat stress. Abstract laser cutting is an energy based unconventional process is an advanced machining process. Portable automatic gas cutter manufacturer of cutting. Like the cutting outfit, the minimum welding outfit consists of the following parts. Awaiting your valuable commentssuggestionsqustions towards improving safety in gas cutting operation and their. Alfa laval has a long history of helping coke producers meet their challenges with our solutions for heat transfer and separation. Welding, cutting, and brazing checklist for general industry a negative answer to any question indicates an area of safety or health concern.

On this episode he goes over the set up and operation of the torch itself. Cutting with the oxyfuel process is just the opposite from of welding. Basics of operation and application of oil flooded rotary screw compressors 149 figure 6. Apr, 2010 how to cut metal with an oxygen and acetylene torch. In addition, oxyfuel cutting is still widely used, both in heavy. Fundamentals of gas cutting and welding cedengineering. Precautions and safe practices for gas welding, cutting.

Rapid oxidation of the steel takes place and material is removed by the pressure of the gases. Upon completion of a welding, heating, or cutting operation, immediately inspect the surrounding areas for smoldering embers. Do a quick visual inspection of the hoses and equipment. The procedure is rather simple, but doing it really well is often as much of an art as science. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. Safety and health at work for gas welding and flame cutting 2 1.

This flame directly strikes the weld area and melts the weld surface and filler material. 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. Aug 07, 2017 on this episode he goes over the set up and operation of the torch itself. Installation and operation of oxygenfuel gas systems for welding and cutting 1910. Careless use of oxyfuel torches has caused many fires. Numerous types of additional auxiliary equipment are available to improve the overall cutting operation. Tankless water heater operation and installation manual.

Safety in gas welding, cutting and similar processes. Welding, cutting, and allied processes supersedes ansi z49. At the bottom of the kerfthe melt is thicker due to deceleration of the film and surface tension retarding the melt from leaving. Injuries are in the form of eye injuries, infections, burns and due to lifting, slips, falls, and dropped or falling objects during the process. Ensure sufficient ventilation for gas cutting to prevent the air from becoming state. 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. After all its about the quality of the entire fitting contour to reduce fitting and welding time.

Safe operating procedures sop 15 oxy acetylene cutting. The oxyfuel process utilizes a flame to generate heat for cutting, welding and brazing. A check valve is a device that is designed to prevent the unintentional backflow of gases. The process may be manual, where the cutting torch is held and. Gas cutting the common methods used in cutting metal are. This leaflet is for people who use compressed gases for welding, hot. Safety in gas welding, cutting and similar processes hse. In oxy fuel gaswelding processes, the combustion takes place in two stages. Care must be taken to avoid the contact of the flame with any combustible. To be suitable for welding operations, a fuel gas, when burned with oxygen, must have the following.

Opening and closing procedure gas cutting equipment set the correct working pressures with the gas flowing. Cutting processes application of oxyfuel cutting twi. The flame is hot enough to fuse the metal surfaces together for welding. Apr 16, 2017 gas welding is a most important type of welding process. Y does each operator have a copy of the appropriate operating instructions and are they directed to follow them.