Lesson 1Safe Pressure Levels and How to Set Regulators for Cutting Mild Steel PlatesThis lesson sums up safe oxygen and fuel pressures for cutting mild steel plates. It shows how to adjust regulators right, read the gauges, and avoid too much pressure, backfires, or bad cuts by keeping settings steady and balanced for good results.
Pressures needed for different plate thicknessesHow to set and balance regulatorsReading gauges correctlyAdjusting for heating and starting cutsSigns of unsafe pressuresLesson 2Simple Metal Science for Carbon and Mild Steel in Oxy-Fuel Cutting (Thickness, Burning, Heat Zone)This lesson introduces basic metal knowledge for carbon and mild steel used in oxy-fuel cutting. It explains how steel burns, what happens in the heat zone, how thickness affects cuts, and how the steel's makeup and structure impact cut quality and bending.
Carbon amount and types of steelHow iron burning helps in cuttingHeat zone and how it makes steel hardThickness, weight, and heat spreadHow it causes bending and twistingSpotting metal problemsLesson 3How to Cut Straight and Square Lines (Torch Angle, Speed, Heating, Starting Pierces)This lesson shows how to hold the torch for straight, square cuts, with right angle, distance, and speed. It covers when to heat up, use start and end tabs, pierce safely, and keep a steady cut line for accurate work in local shops.
Torch angle and tip distanceHeating time and melt poolPiercing steps and safetySpeed and cut width controlUsing start and end tabsKeeping hand steadyLesson 4Cleaning Cut Edges and Preparing Them (Grinding, Removing Slag, Checking Sizes)This lesson details cleaning after cuts with chipping, grinding, and filing. It explains removing slag and waste, smoothing burrs, and checking sizes with tools to ready edges for welding, fitting, or more work in boilermaking tasks.
Safe slag and waste removalGrinding and smoothing edgesSmoothing holes and cornersChecking square and angleMeasuring length and straightPreparing for weldingLesson 5Marking, Planning, and Measuring for Cutting Frame Parts (Scribing, Squares, Patterns)This lesson covers accurate planning for frame parts using squares, scribing tools, and patterns. It explains picking reference points, copying sizes from drawings, and marking that stays clear but does not harm the surface much.
Reading drawings and sizesPicking reference points and edgesUsing squares, tapes, and rulersScribing and punching linesUsing patterns and guidesChecking corners and diagonalsLesson 6Checking and Testing for Leaks Before Use (Looking Over, Soap Test, Flashback Checks)This lesson outlines steps to check cylinders, hoses, regulators, and torch before use. It shows soap leak tests, checking flashback tools, and testing valves and links to stop gas leaks, flashes, and breakdowns in safe operations.
Looking at hoses and jointsChecking regulators and gaugesSoap leak test wayTesting flashback stopsChecking valve workNoting and tagging problemsLesson 7Parts of Oxy-Fuel System and How to Maintain Them (Cylinders, Regulators, Hoses, Torch, Tips, Flashback Stops)This lesson describes oxy-fuel parts and what they do, like cylinders, regulators, hoses, torch, tips, and flashback stops. It covers basic care, cleaning, and when to replace for safe, reliable use in daily boilermaking.
Cylinder valves and fittingsRegulators and pressure controlHose kinds, colors, and careTorch body, mixers, valvesTip kinds, cleaning, wearFlashback stops and check valvesLesson 8Fixing Common Cut Problems and Quality Checks (Undercut, Slant, Waste Buildup)This lesson focuses on spotting and fixing common cut issues like undercut, slant, drag marks, and waste. It gives practical changes to speed, tip size, pressures, and easy checks for good production work in shops.
Spotting undercut and washoutSeeing slant and angle errorsCauses of heavy waste and dragAdjusting speed, height, angleFixing pressure and tip problemsEasy look and tool checksLesson 9Handling, Storing, and Labeling Cut Parts (Tagging, Stacking, Stopping Rust)This lesson explains safe handling and storage of new cut parts, with labeling, tagging, and direction marks. It covers stacking ways, supports, and basic rust stop to keep sizes accurate and trackable for later use.
Tagging and part labelingMarking sides for fittingSafe lifting and hand handlingStacking, supports, and basesShort rust protectionShop records and labelsLesson 10Choosing Gases and Tip Sizes for Common Plate Thicknesses (Acetylene vs Propane, Suggested Tip Numbers)This lesson covers picking oxygen-fuel mixes and tip sizes for usual mild steel thicknesses. It compares acetylene and propane, and lists tip numbers and flows for fast, cheap cutting in local boilermaking jobs.
Comparing acetylene and propaneGas pick by thickness and jobMaker tip guides and infoPicking tip size and holeFlow rates and heat adjustImpact on cut speed and quality
