Oxy-Fuel Setup: Cylinder Separation, Hose, and Pressure Limits
"Oxy-Fuel Setup: Cylinder Separation, Hose, and Pressure Limits" is lesson 4 of 6 in the Welding (C-60) Learning Hub. It opens with "Moving and Storing Cylinders" and works through 5 short steps, then a worked example you can check yourself against.
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Steps in this lesson
Moving and Storing Cylinders
Separate Oxygen From Fuel Gas
Pressure Limits and Valve Handling
Hose Rules With Numbers
Torch Checks and Shutdown
The worked example in the course applies this lesson to a realistic job in 4 steps, from "Cylinder separation" through "Acetylene regulator".
What you'll be able to do
Explain the main idea of "Oxy-Fuel Setup: Cylinder Separation, Hose, and Pressure Limits" in plain language you can use on the exam.
Apply this step with confidence: "Pressure Limits and Valve Handling".
Apply this step with confidence: "Hose Rules With Numbers".
Apply this step with confidence: "Torch Checks and Shutdown".
Test yourself on the worked example and the quick-check quiz inside the classroom.
The diagram for this lesson, exactly as it appears in the Learning Hub.
The first steps of this lesson
Step 1: Moving and Storing Cylinders
Valve protection caps go on before a cylinder is moved, stored, or transported, and cylinders are conveyed on a suitable hand truck or held in racks so they cannot fall (8 CCR Section 1740(c)). Cylinders raised by crane go in a cradle, net, or skip box and are never lifted by magnet or by rope or chain slings (Section 1740(d)); general industry adds that valve protection devices are not used for lifting and cylinders are never used as rollers or supports (Section 4650(j), (q)). Cylinder valves are closed when the work is finished, when the cylinder is empty, and before it is moved (Section 4650(k)-(m)).
Step 2: Separate Oxygen From Fuel Gas
Oxygen cylinders in storage must be separated from fuel-gas cylinders or combustible materials (especially oil or grease) by a minimum of 20 feet, or by a noncombustible barrier at least 5 feet high with a fire-resistance rating of at least one-half hour on construction work (8 CCR Section 1740(g)). The General Industry Safety Orders word it differently: a barrier at least 5 feet high, or a minimum of 18 inches above the tallest cylinder, with a rating of at least one hour (Section 4650(d)); oxygen manifolds use 20 feet or a one-half-hour barrier (Section 4836(a)). The 2025 California Fire Code uses 20 feet or a noncombustible partition extending at least 18 inches above and to the sides of the stored material for incompatible compressed gases (Section 5003.9.8). Fuel-gas cylinders are stored and used valve end up (Section 1740(b)).
The remaining 3 steps, the worked example and the quiz are in the course. This is a preview. The full lesson, with the step-by-step explanations, a worked example and a quick-check quiz, is inside the classroom.
Independent exam preparation. Contractors Classroom is not affiliated with the Contractors State License Board, and no course can guarantee a passing result.
