Oxy-Acetylene Cutting Oxy-acetylene torches have an attachment for cutting, which can be attached to the welding torch. Here the flow of oxygen is controlled a lever. In planning the job, have the tanks firmly secured to prevent tipping over, the hose should be BEHIND you so as to protect it from damage due to flying sparks. Make certain also that
Read more →Cutting with MAPP gas. (1) Quality cuts with MAPP gas require a proper balance between preheat flame adjustment, oxygen pressure, coupling distance, torch angle, travel speed, plate quality, and tip size. Oxyfuel ratios to control flame condition are given in table 11-4. (2) MAPP gas is similar to acetylene and other fuel gases in that it can be made to
Read more →Cutting Steel and Cast Iron. (1) General. Plain carbon steels with a carbon content not exceeding 0.25 percent can be cut without special precautions other than those required to obtain cuts of good quality. Certain steel alloys develop high resistance to the action of the cutting oxygen, making it difficult and sometimes impossible to propagate the cut without the use
Read more →General. (1) If iron or steel is heated to its kindling temperature (not less than 1600°F (871°C)), and is then brought into contact with oxygen, it burns or oxidizes very rapidly. The reaction of oxygen with the iron or steel forms iron oxide (Fe3O4) and gives off considerable heat. This heat is sufficient to melt the oxide and some of
Read more →