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Module 2 - 1

Module 2

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Safe Practices
for
Welding
Inspectors
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Module 2 - 2

ANSI/ASC
Z49.1
Study
Reference
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Personal
Protectiv
e
Equipmen
t For
Welders

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Potential Job Hazards Inspectors

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Electric Shock
 Falling
 Radiation
 Burns

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Eye Hazards
 Smoke and
Fumes
 Falling Objects

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Management Support
... is the most important element in
an effective safety and health
program.

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Management Support
... is evidenced by:
 Stating clear safety objectives
 Showing commitment to safety
 Designating safe work areas
 Developing safety procedures
 Providing safe equipment
 Implementing safety training

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Safety Training
Mandated by local occupational
safety regulations (e.g., OSHA
29CFR1910.1200)
 A key aspect of safety
 Fosters continuous improvement
 Aids accident prevention

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Remember,
All accidents can be
prevented!

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MSDS
Material Safety Data Sheets

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TLV
Threshold Limit Value

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Occupational Safety Training
Topics

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Hazardous materials
 Equipment operation
 Equipment maintenance
 Recognition of hazards
 Safety rules

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Housekeeping
… is the safety key to reducing:
 Tripping hazards
 Fire hazards
 Blocked escape routes
 Improper materials storage

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Protective Screens

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Note C-Clamps hanging on top rail of
screen.
Good Idea???

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Fire Prevention
Designated welding/cutting areas
 Work areas free of combustibles
 Knowledge of equipment
 Knowledge of processes
 Fire watch if needed
 Hot work permit

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Hot Work Permit

Description
– Date, time, location
– Nature of job

Flammability checks
 Fire extinguishers
 Instructions
 Supervision signature

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Explosion Hazards
Flammable gases
 Flammable vapors
 Non-vented containers
 Oxygen-rich environments

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Eye, Ear, Face, and Head
Protection

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Protective Clothing - 1 of 2
Sturdy boots, no laces
 Clean clothing
 Woolen is best
 Treated cotton acceptable
 No synthetics!

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Protective Clothing - 2 of 2
Trousers without cuffs
 Trousers outside boots
 Flaps on shirt pockets
 Cap
 Gloves
 Leathers

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Machinery
Operating instructions
 List of approved operators
 Equipment guards
 Equipment repairs
 Lock, Tag, and Try

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Fume
Exposure
Note Head
Position

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Fume Avoidance
The most important factor in
avoiding fumes during welding is
the position of the head. Keeping
the head out of the fume plume will
avoid breathing the vast majority
of the fumes created.

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Fume and
Gas
Removal

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Ventilation Types
Natural
 Mechanical, fans
 Exhaust hood
 Downdraft tables
 Air-ventilated helmets

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Confined Space Welding
and Welding Inspection

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Confined Space Safety
Factors

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Container cleanliness
 Ventilation
 Welding gases
 Electrical shock ( use a GFCI )
 Escape aspects
 Entry Permit
 Standby person

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Safe Welding and
Cutting of Containers

Prior use? Must know!
– Toxic chemicals
– Flammable chemicals

Fill with inert gas/water
 Vent container
 Fire extinguishers nearby

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Highly Toxic Materials

Exposure limits < 1.0 mg/m3
Sb

As

Ba

Be

Cd

Cr

Co

Cu

Pb

Mn

Hg

Ni

Se

Ag

V

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Compressed
Gases
Cylinder Safety

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Cylinder Handling - 1 of 2
Do:
Identify properly
 Protect from damage
 Hoist properly
 Keep upright (vertical)
 Secure with chains

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Cylinder Handling - 2 of 2
Don’t:
Weld on cylinders
 Ground electrically
 Use as rollers
 Expose below -200 F
 Expose above 1300 F
 Lay on side

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Cylinder Usage
Approved regulators only
 Open slowly
 Face away from regulator gage
 High PSI - open all the way
 Fuel cylinders - open 1 turn max.
 Close after use

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Manifold /
Piping
Systems
Label Properly

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Manifold / Piping Systems
Design properly
 Include relief devices of proper size
 Vent relief devices properly
 Label all piping properly
 Operate properly

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Acetylene
---A Fuel Gas

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Oxygen
---Nonflammable
BUT
It Supports
Combustion
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Shielding Gases
Argon, Helium - Inert
 Nitrogen, Carbon dioxide - Reactive
 Odorless
 Colorless
 Can displace oxygen

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Electric Shock
Many sources for shock
 >6 ma - primary current - harmful
 Insulation - best guard
 Good connections
 Personnel training

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Module 2 - 39

Remember,

ALL
ACCIDENTS CAN BE
PREVENTED !
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