OXY-FUEL GAS WELDING

TERMS AND DEFINITIONS CONTINUED  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 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

Goggles Ear Plugs Hearing Protection Safety Glasses EYE & EAR PROTECTION

HEADGEAR Cover Lens Spare Cover Lens Filter Lens Adjustable Head Gear

AWS/ANSI LENS SHADE NUMBERS

Leather Welding Trousers Leather Welding Cape Sleeves/Bib Leather Welding Jacket Leather Welding Gloves Leather Welding Apron OPTIONAL COVERING

Cap with Visor Turned to the Back Cap with Visor Turned to the Back Long Sleeve Shirt Long Sleeve Shirt Pants without Cuffs Pants without Cuffs Gauntlet Leather Welding Gloves Industrial Quality Safety Glasses PROPER ATTIRE High Top Leather Boots (Steel Toes)

OXY-FUEL SAFETY VIDEO  You will take half a page of notes  You will turn them in 