OXY-FUEL GAS WELDING

TERMS AND DEFINITIONSCONTINUED

Back Fire Momentary burning back of the flame into the

tip. Flame goes out with a loud snap or pop.

Flash Back Fire inside the torch.

Inner Cone Inner white part of a neutral flame.

STEPS FOR OXY-FUEL WELDING

Support oxygen and acetylene cylinders in an upright position so they cannot be tipped over

Make sure pressure-adjusting screws are loose before opening the cylinder valve

Stand to the side of tank and regulator

STEPS CONTINUED

Open cylinder valve SLOWLY. Note: The oxygen cylinder valve is opened to full

capacity. The Acetylene valve is opened ¾ of a turn only.

Set Acetylene to 5-7 psi Note: Acetylene becomes unstable at pressures

above 15 psi and becomes highly explosive.

Set Oxygen to 10-20 psi Light Acetylene before opening oxygen

torch valve. Use only a striker, never a match or lighter.

ADJUSTING THE FLAME

Adjust the flame to a neutral flame. This is the desired flame for most welding applications.

There are 3 types of flames. Neutral Flame

Perfect flame Oxidizing Flame

Too much Oxygen Carburizing Flame

Too much Acetylene

SAFETY

Never use oil or grease on regulators, torches, or fittings.

Do not use oxygen as a substitute for compressed air

Use safety goggles, gloves, and protective clothing.

Have CO2 or dry chemical type fire extinguishers available.

Test connections for leaks with a non-oil-based soapsuds, paint brush, and water.

Avoid lighting the torch or welding near combustible materials.

SAFETY RULES CONTINUED

Never open the acetylene cylinder valve more than ¾ of a turn.

Always operate torch in a well ventilated place.

Never weld on containers that have been used for combustible materials.

Avoid breathing toxic fumes when welding. Place steel caps on all gas cylinders when

they are being moved or stored, to protect the valves.

Shut off cylinder valves when not in use for any length of time to reduce the possibility of leakage and strain on equipment.

PPE (PERSONAL PROTECTIVE EQUIPMENT)

Eye & Ear Protection

Welding Goggles with Proper Lens Shade Number

Welding Gloves & Optional Covering

Proper Attire for OFW, OFC, OFB, & AFS

GogglesGogglesEar PlugsEar Plugs

Hearing ProtectionHearing Protection

Safety GlassesSafety Glasses

EYE & EAR PROTECTION

HEADGEAR

Cover LensCover Lens

Spare Cover LensSpare Cover Lens

Filter LensFilter Lens

Adjustable Head GearAdjustable Head Gear

LENS SHADES SELECTION FOR OXYGEN FUEL GAS APPLICATIONSMaterial Minimum Recommended*

Size Protective Shade Operation Inches Shade Number Number

Oxygen Fuel Gas Welding )(OFW) < 1/8 4 4-51/8 to 1/2 5 5-6

> 1/2 6 6-8

Oxygen Fuel Gas Brazing 3 3-5

Air Fuel Gas Soldering 2 2-4

Oxygen Fuel Gas Cutting (OFC) < 1 3 3-41 to 6 4 4-5

> 6 5 5-6

* As a rule of thumb, start with a shade that is too dark to see the weld or cutting zone. Then go to a lighter shade, which gives sufficient view of the weld or cutting zone without going below the minimum.

AWS/ANSI LENS SHADE NUMBERS

Leather Welding TrousersLeather Welding TrousersLeather Welding Leather Welding Cape Sleeves/BibCape Sleeves/Bib

Leather Welding JacketLeather Welding Jacket

Leather Welding GlovesLeather Welding Gloves

Leather Welding ApronLeather Welding Apron

OPTIONAL COVERING

Cap with Visor Cap with Visor Turned to the Back Turned to the Back

Long Sleeve Shirt Long Sleeve Shirt

Pants without CuffsPants without Cuffs

Gauntlet Leather Gauntlet Leather Welding GlovesWelding Gloves

Industrial Quality Industrial Quality Safety GlassesSafety Glasses

PROPER ATTIRE

High Top High Top Leather BootsLeather Boots(Steel Toes)(Steel Toes)

OXY-FUEL SAFETY VIDEO

You will take half a page of notes

You will turn them in

https://www.youtube.com/watch?v=pVv8a_FVIOU