Welding and Cutting for construction

Welding safety program guidelines

• Person responsible

• Accountability and enforcement

• Job hazard assessment

• Special procedures

1a

Welding safety program guidelines

• Engineering controls

• Administrative controls

• Personal protective equipment

1b

Welding safety program guidelines

• Equipment inspection/maintenance

• "Near miss" investigation

1c

Compressed gas cylinders hazards

• Valve protection caps

• Hoisting cylinders

• Moving cylinders

2a

Compressed gas cylinders hazards

• Transporting by powered vehicles

• Cylinders in use

• Closed cylinder valve

2b

Storing compressed gas cylinders

• Upright position

• Oxygen cylinders separated

• 20 foot rule

• CGA Pamphlet P-1-1965

3a

Placing compressed gas cylinders

• Fire prevention

• Electrical protection

• Valve end up

• Confined space restriction

4a

Treatment of compressed gas cylinders

• Do not: – Mix gases in a cylinder – Refill a cylinder – Use for purposes not intended – Use damaged or defective

cylinders

5a

Training employees using fuel gas

• Reduce the pressure via a regulator

• Cracking the valve

• Open slowly

• Close valve/release gas

6a

Cylinder leaks

• Immediately discontinue use

• Properly tag

• Remove from the work area

7a

Fuel gas and oxygen manifolds

• Manifolds correctly marked

• Safe, well ventilated locations

• Hose connections keep free of grease and oil

8a

Fuel gas and oxygen hose

• Easily distinguishable from each other

• Not interchangeable

• Parallel sections taped together

• Inspect before using

9a

Fuel gas and oxygen hose

• Remove defective hose from service

• Test to twice the normal pressure

• Keep out of passageways

9b

Torches

• Clean clogged torch tip openings

• Inspect before using

• Don’t use defective torches

• Use friction lighters

10a

Housekeeping

• Keep free from oil or greasy substances

• Avoid directing oxygen flow

11a

Manual electrode holders

• Specifically designed

• Fully insulated

12a

Welding and cutting cables

• Completely insulated, flexible type

• Handle maximum current requirements

13a

Welding and cutting cables

• Do not use damage cable

• Worn cable to be protected

• Connecting or splice cable

13b

Training for arc welding and cutting

• Remove electrodes if left unattended

• Avoid electric shock

• Open power supply switch

14a

Training for arc welding and cutting

• Report defective equipment

• Provide supply circuit disconnect

• Provide switch or circuit breaker

14b

Five common arc-welding processes

• Shielded metal (SMAW)

• Gas metal (GMAW)

• Gas tungsten (GTAW)

• Flux cored (FCAW)

• Submerged (SAW)

15a

Welding and fire prevention

• Move object to safe location

• Move fire hazards to safe place

• Confine the heat, sparks, and slag

16a

Welding and fire prevention

• Avoid flammable compounds

• Fire extinguishing equipment

16b

Fire watchers

• Assign additional personnel

• Instruct in the specific hazards

• Firefighting equipment is used

16c

Drums and containers

• Keep closed if full

• Move empty containers to safe area

• Clean containers if necessary

• Open vent during the application of heat

16d

Mechanical ventilation

• General mechanical ventilation systems

• Local exhaust systems

• Oxygen restrictions

17a

Confined spaces

• Use of air line respirators

• Communication

• Emergency rescue

• Pre-planed rescue procedure

18a

General welding, cutting, and heating

• Absence of hazards conditions

• Absence of toxic materials

• No special requirements

• Eye protective equipment needed

19a

Preservative coatings

• Testing by a competent person

• Determine flammability

• Remove from welding area

20a

Physical hazards of welding and cutting

• Ultraviolet radiation (UV)

• Infrared radiation (IR)

• Intense visible light

21a