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1. WELDING

2. CONTENTS
 Definations
 Types Of Welding Processes
 Welding Nomenclature ,Symbols and Terminology
 Types Of Welds
 Types Of Joints
 Welding positions
 Description Of widely used processes i.e.
 SMAW (Shielded Metal Arc Welding)
 GTAW (Gas Tungsten Arc Welding)
 Codes & Standards

3. CONTENTS…
 Welding Inspection
 Welding Metallurgy
 Mechanical Testing
 Welding Defects
 Welding Safety

4. Defination :
 A union between materials caused by heat, and or pressure
 Bringing two perfectly smooth & clean material surfaces to
an intimate contact, which is an atomic distance, is known
as welding

5. TYPES OF WELDING PROCESSES
1. Shielded Metal Arc Welding (SMAW)/Manual
Metal Arc Welding ( M.M.A )
2. Metal Inert Gas ( MIG)/Metal Active Gas ( MAG )
Welding
3. Tungsten Inert Gas ( TIG) Welding/Gas Tungsten
Arc Welding (GTAW)
4. Plasma Arc Welding( PAW )
5. Submerged Arc Welding ( SAW )
6. Electroslag Welding

6. WELDING TERMINOLOGY (BUTT WELD)

7. WELDING TERMINOLOGY (FILLET WELD)
Leg length
Reinforcement
Designed throat
Actual Throat
Face
Leg Height

8. WELDING TERMINOLOGY (JOINT)
Angle of bevel*
Included
angle*
Root gap*
Root face*
Root radius*

9. WELDING SYMBOLS
Weld all around
Double V Double U
Fillet Single
bevel
Single J
Welding
process

10. TYPES OF WELDS
Butt Weld Fillet Weld
Spot/Seam Weld Plug/Slot Weld
Edge Weld

11. TYPES OF JOINTS
Corner Joint
Butt joint T Joint
Lap Joint
Open Corner Joint

12. WELDING POSITIONS FOR PLATE
(GROOVE)

13. WELDING POSITIONS FOR PIPE
(GROOVE)

14. WELDING POSITION FOR PLATE
(FILLET)
1 F 2 F 3 F 4 F

15. WELDING POSITION FOR PIPE (FILLET)

16. SHIELDED METAL ARC WELDING
(SMAW)
is a manual arc welding process that uses a
consumable electrode coated in flux. Current in the
form of either AC or DC from a welding power supply, is
used to form an electric arc between the electrode and
the metals to be joined. As the weld is laid, the flux
coating of the electrode disintegrates, giving off vapors
that serve as a Shielding gas and providing a layer of
slag, both of which protect the weldment from air
entrapment and slag prevent sudden cooling

17. Power
Source
AC or DC

18. ADVANTAGES & DISADVANTAGES

21. GAS TUNGSTEN INERT GAS
WELDING (GTAW)
 is an arc welding process that uses a non
consumable tungsten electrode to produce Arc and
filler rod is use to make weld. The weld area is
protected from atmospheric through inert shielding
gas i.e. Argon