Equipment
Handling and Storage of Cylinders
Fire Safety Equipment
- Store cylinders in a clearly identified, dry, well-ventilated storage area away from doorways, aisles, elevators, and stairs.
- Post "no smoking" signs in the area.
- Store cylinders in the upright position and secure with an insulated chain or non-conductive belt.
- Secure the protective caps.
- Ensure that the area is well ventilated.
- Protect cylinders from contact with ground, ice, snow, water, salt, corrosion, and high temperatures.
- Store oxygen and fuel gases separately.
- Fire blanket
- Fire extinguisher
- Chemical shower
Moving of Cylinders
Joint Types
- Remove the regulator and replace the valve protection cap before moving a cylinder.
- Move cylinders with appropriate trolleys. Use proper lifting cradles.
Cold Metal Hand Tools and Power Tools
- Butt Joint
- T Joint
- Lap Joint
- Corener Joint
- Edge Joint
- Angle Grinder
- Wire wheels
- Wire brush
- Pliers
- Tap and Die
- Hydraulic press
How to Read an Electrode
1. "E" indicates an arc welding electrode.
2. First two digits indicates the minium tensile strength (in thousands).
3. Next to last digit indicates position
1= all position
2= flat or horizontal
4= flat, horizontal, vertical down, or overhead
4. Last 2 digits, taken together, indicates the type of coating and the correct polarity/current to use.
Brazing
Oxyfuel Welding
Plasma Arc Cutting
- Uses heat from the combustion of a mixture of oxygen and a fuel gas, such as acetylene.
- Melting and flowing a filler metal into the joint, the filler metal having a lower melting point than the adjoining metal.
- Constricted arc and high-pressure gas to form a high-velocity jet of plasma for cutting.
Set-Up and Process
- Air pressure at 60 psi.
- Voltage set according to metal:
- Thinner metals (ex. aluminum): lower voltage.
- Thicker metals (ex. steel): higher voltage.
- Metal with rust: higher voltage.
- Drag plasma cutter across metal for a clean cut.
Set-Up and Process
- Acetylene set to 10-15 psi.
- Oxygen set to 40 psi.
- Neutral flame used to heat metal.
- Brazing filler rod used to form bead.
Personal Protective Equipment
- Acetylene set to 10-15 psi.
- Oxygen set to 40 psi.
- Neutral flame used to heat metal.
- Filler rod may be used to form bead.
SMAW
Shielded Metal Arc Welding
GTAW
Gas Tungsten Arc Welding
GMAW
Gas Metal Arc Welding
Heavy-Duty Leather Gauntlet Type Gloves
Pant Legs Over Boots, No Cuffs
- Produces an arc between a nonconsumable tungsten electrode and the base metal, creating a weld pool.
- Electrode, arc, and weld pool protected from atmosphere by shielding gas.
- Produces an arc between a continuous wire electrode and the base metal, creating a weld pool in the presence of a shielding gas.
- Used to weld various ferrous and nonferrous metals.
- Produces an arc between a consumable, coated electrode and the base metal, creating a weld pool.
- Weld pool and molten weld are protected by shielding gas produced from the electrode's coating.
- Electrod coating contains flux that forms a protective slag over the weld.
Set-Up and Process
- Argon: 15 psi.
- Amperage: E-F
- Wire Speed: 200
- Drag welding gun to form bead.
Set-Up and Process
- Sharpen tungsten to a point.
- Clean aluminum with wire brush.
- Polarity: AC
- Amperage: 40-80
- Voltage: 10-15
- Argon: 20 psi.
Steel
- Tungsten used to heat metal.
- Filler rod dipped into puddle to form bead.
- Connect ground.
- Connect electrode to electrode holder.
7018
- Polarity: DC
- Amperage: 120-140
6011 & 6013
- Polarity: AC
- Amperage: 90-120
- Strike electrode against metal to form arc.
- Drag or push arc as preferred to form bead.