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AGENDA

OXY-FUEL

SAFETY LESSON

Identify safety practices when welding with oxyacetylene.

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MATERIALS TO BE USED��OXYGEN CYLINDER, ACETYLENE CYLINDER, REGULATOR, VALVES, TORCH, WELDING TIPS, GOGGLES, FRICTION LIGHTER, TIP CLEANER, WELDING PPE

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KEY POINTS AND SUPPORTING INFORMATION :��WEAR PERSONAL PROTECTIVE EQUIPMENT� �FASTEN CYLINDERS SECURELY�NEVER USE OIL ON WELDING EQUIPMENT� �OPEN CYLINDER VALVES CORRECTLY� �KEEP THE TIP POINTED AWAY FROM YOUR BODY� �LIGHT THE FLAME WITH AN APPROVED LIGHTER.� �SET THE OPERATING PRESSURE CAREFULLY� �DO NOT SMOKE OR ALLOW ANYONE ELSE TO SMOKE NEAR THE OXY-FUEL GAS WELDER. � �TREAT THE FLAME WITH RESPECT� �CONTROL FLASHBACKS AND BACKFIRES.� �DO NOT LEAVE THE WORK AREA UNTIL THE CYLINDER VALVES ARE CLOSED� �NEVER STAND IN FRONT OF A REGULATOR WHILE YOU ARE OPENING A TANK VALVE.� �DO NOT WELD OR CUT ON CONTAINERS THAT HAVE HELD FLAMMABLE MATERIALS. � �REMOVE REGULATORS AND REPLACE PROTECTIVE CAPS BEFORE TRANSPORTING CYLINDERS� �STORE OXYGEN CYLINDERS AWAY FROM ACETYLENE CYLINDERS.� �HANDLE HOT METAL WITH PLIERS OR TONGS.� �CHECK CONNECTIONS FOR LEAKING GASES

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1. Wear personal protective equipment. Wear welding gloves, helmet, leather apron, welding chaps, leather shoes, welding goggles, and other personal protective equipment to help prevent weld burns and injury. Do not wear clothing made of synthetic fibers while welding.

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2. FASTEN CYLINDERS SECURELY.

DO NOT HANDLE CYLINDERS ROUGHLY.

CHAIN CYLINDERS IN AN UPRIGHT POSITION TO A WALL OR CART.

WHEN REGULATORS ARE NOT ON CYLINDERS, KEEP SAFETY CAPS IN PLACE.

CAPS WILL PREVENT DAMAGE TO CYLINDER VALVES.

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3. OPEN CYLINDER VALVES CORRECTLY. ��OPEN THE VALVE ON THE ACETYLENE CYLINDER NO MORE THAN THREE-FOURTHS OF A TURN SO IT CAN BE CLOSED QUICKLY IN CASE OF EMERGENCY. OPEN THE VALVE ON THE OXYGEN TANK FULLY. WHILE WELDING OR CUTTING, LEAVE THE VALVE WRENCH IN POSITION.�

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4. Keep the tip pointed away from your body.

Do not saturate your clothing with oxygen or acetylene.

Before and while lighting the flame, keep the tip pointed away from your body.

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5. Light the flame with an approved lighter.

Using matches to light the torch brings fingers too close to the tip.

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6. Set the operating pressure carefully.

Never use acetylene at a pressure over 15 psi. Follow the manufacturer's recommendations for the correct operating pressures for the metal being cut and for the tip size being used.

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7. Treat the flame with respect.

Keep the flame and heat away from the cylinder, hoses, and people. Never lay down a lighted torch. Be sure the flame is out before laying down the torch. Never walk around with a lighted torch.

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8. Control flashbacks and backfires.

Make certain that reverse flow-check valves and flash arrestors are installed on the oxygen and acetylene lines.

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9. DO NOT LEAVE THE WORK AREA UNTIL THE CYLINDER VALVES ARE CLOSED. �BE SURE THE CYLINDER VALVES ARE CLOSED AND PRESSURE IS RELIEVED FROM THE HOSES BEFORE YOU LEAVE THE WORK AREA.

This project was completed with the assistance of:

New England Laborers’ Training Trust Fund,

MassDOT

Massachusetts Pre-Apprenticeship Vocational School Advanced Summer program