Cutting Torch Presentation

Oxygen CylinderAcetylene Cylinder Securing the cylinders Regulators Cutting Torch Spark lighter Hoses Goggles safety shield  Oxygen is very pure - 99%  Pressure is about 2200 psi at 70 0 F  Hydrostatic tested to 3300 psi  Forged from a single piece of steel - no welding  Minimum of 1/4” thickness  Stored away from combustibles • 5’ high wall • 20 FEET AWAY FROM Acetylene Brass Construction Double back seat - NEVER LEAVE HALF OPEN Pop off valve - (fragile disk) Right hand Thread  Acetone - absorbs acetylene under pressure  Consumption rate = 1/7 content per hour  Fusible plug - 212 0 F  Temperature has an extreme affect on pressure  Let stand upright at least 20 minutes before using  Protected valve or cylinder cap  Stored away from oxygen and combustibles • 5’ high wall • 20 FEET AWAY FROM OXYGEN Brass Construction Packed valve - OPEN 1/2 TO 3/4 TURN Hand wheel or tank wrench - NEVER REMOVE WRENCH during use RH (Male) or LH (Female) Thread Protects valve from being knocked off Must be in place when Regulators are off Never call oxygen “Air” Never allow oxygen to come in contact with oil, grease, or other petroleum bases Never use oxygen for compressed air Never move cylinders without caps Always secure cylinders  Do not move cylinders without valve protection  Secure cylinders  Inspect threads  “Crack” Oxygen Valve  Attach regulators and tighten  Blow talc from new hoses  Attach Flashback arrestors, check valves, hoses, check valves, torch body, torch head, and tip  Properly pressurize torch and check for leaks Increased Efficiency more stations no downtime Cylinders Hoses - Brass or braided Check valves or hand valves Flashback Arrestors - OSHA Regulators Main valves Continuous supply of gasses Do not allow empties to be pressurized Valves and/or checkvalves Never unsecure cylinders without protective caps Check for Leaks MT - DATE  Gauges - High and Low pressure  Bonnet - weakest point  Adjusting screw - Clockwise = On Single stage - less expensive Dual stage - more accurate - lump on back - 200 psi Nozzle Type - low volume Stem type - High Volume Gauges - High and Low pressure - bourbon tube Bonnet - weakest point Adjusting screw - Clockwise = On Regulators Torch / Manifold Regulator / torch Acetylene = Red • Notch around nut means LH thread Oxygen = Green • RH Thread New Hoses have talc inside - Blow out before connecting to torch What each does Preheat / Cutting hole pressures Tightening single stage / dual stage 1 or 2 piece (1 TO 6 HOLES FOR CUTTING TORCH) sizes relate to # Drill Sizes Hand / Wrench tight Acetylene Preheat: very light Typical use: clean metal plate cutting and trimming Acetylene Preheat: medium Typical use: clean plate, straight line or circle machine cutting and trimming Acetylene Preheat: medium Typical use: cutting close to bulk head, cutting off rivet heads Acetylene Preheat: light Typical use: Hand and machine cutting, clean plate Acetylene Preheat: medium Typical use: General hand and machine cutting What typical use is Size tip 00-2 00-4 00-4 0,1,2 00-8 Material thickness 1/8 1/4 1/2 3/4 1 11/2 2 4 5 Recommended Tip # 00 0 1 1 2 2 3 3 4 Oxygen pressure Setting, lb./in.2g 20-25 25-30 30-35 30-35 35-40 40-45 40-45 40-50 45-55 Acetylene pressure Setting, lb./in.2g 3-5 3-5 3-5 3-5 3-7 3-7 5-10 5-10 6-12 Cutting speed range. In./min 27-30 26-29 20-24 17-21 14-18 13-17 12-15 8-11 7-9 Carborizing Neutral Oxidizing  SCREW ADJUSTING SCREW OUT  Stand to the side of the adjusting screw  Open tanks one at a time (Oxygen wide, Acetylene 1/2 turn)  Adjust regulators  Bleed lines one at a time  Fine adjustments made while bleeding the hoses  Open the acetylene needle valve and light torch  Open high pressure oxygen needle valve wide  Adjust to a neutral flame Short cuts, the torch can be drawn over the gloved hand Longer cuts, the torch can be moved by sliding gloved hand along the plate to the cut start finish Heat the starting point Move the oxygen hole off the edge of the plate and start the oxygen stream Resume Cutting 1) Good cut 2) Pre heat flame small, speed to slow 3) Pre heat too long, cause melt over 4) Oxy level to low, slow cutting speed 5) Oxy level to high, nozzle to small 6) Cutting speed to slow 7) Cutting speed to fast 8) Torch travel was unsteady 9) Cut was lost and not restarted carefully Slide the torch through your fingers toward you. Only move the hand nearest the flame when continuing the cut. Keep your other three fingers in your fist. This will keep your hands cooler and allow you to make a better cut. STARTING A CUT ON THE EDGE OF A PLATE. NOTICE HOW THE TORCH IS POINTED ATA SLIGHT ANGLE AWAY FRONM THE EDGE Rolling your hands • “Pre-load” your wrist and forearm • Roll, don’t slide for a smoother cut Sliding the torch through your fingers • Apply pressure to torch tubes with thumb and index finger • Keep other three fingers in fist • Don’t move the torch body hand during stops and starts. Backflash • Turn Oxygen off first Watch where you cut • Don’t blow molten metal toward another person • Don’t melt the hoses • Don’t drop metal on hoses • Don’t let hoses lay on hot metal Turn off acetylene needle valve Turn off preheat oxygen needle valve Turn off tanks Bleed lines one at a time TURN ADJUSTING SCREWS OUT Turn off all needle valves