Welding PPT (New)
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Transcript of Welding PPT (New)
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
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
Types Of Welding Processes1. 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
Welding Terminology (Fillet Weld)
Leg length
Reinforcement
Designed throat
Actual Throat
Face
Leg Height
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
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