Welding: Part B Review

These flashcards cover key vocabulary and concepts related to oxyfuel cutting and welding equipment.

Oxygen (O2)

A colorless, odorless, tasteless element in air that supports life and combustion.

Air Liquefaction Process

The method of purifying and cooling air to create liquid oxygen at -194°C.

Hazards of Pure Oxygen

Pure oxygen burns readily and quickly; oil and grease near oxyfuel equipment can lead to explosion.

Acetylene (C2H2)

A colorless gas with a strong, irritating odor, produced from calcium carbide and water.

Critical Point of Acetylene

The pressure at which acetylene becomes unstable, set at 193 kPa (28 psi).

MAPP Gas

A liquefied fuel that can be handled like propane, requiring twice the volume of oxygen compared to acetylene.

Propane (C3H8)

A high BTU content gas ideal for heating and cutting thick materials.

Acetylene Cylinders

Cylinders filled with porous filler to hold acetylene gas dissolved in acetone.

Manifold Systems

Systems designed according to CGA standards for handling multiple gas cylinders safely.

Flashback Arrestors

Devices preventing flames from traveling back into hoses or regulators.

Carbonizing Flame

A flame rich in acetylene, characterized by a lower temperature than a neutral flame.

Neutral Flame

A flame with no excess of acetylene or oxygen, resulting in complete combustion.

Oxidizing Flame

A flame rich in oxygen that is shorter, sharper, and paler blue than neutral flame.

Creep in Regulators

A condition where gas leaks past the valve seat, increasing pressure above normal.

Travel Speed in Cutting

The speed at which the cutting torch is moved along the workpiece.

Flame Speed Propagation

The speed at which a flame travels through a gas mixture, typically between 5m/s and 7.5m/s for oxyacetylene.