30 November 2022

Welding Process Selection | SMAW | GTAW | GMAW | SAW

Welding Process Selection

Selection of Welding Process :

Following point shall be taken care while selecting a process

1.Thickness

2. Position

3.Groove size : Narrow or wide

4.Cleanliness : Gas welding

5.Heat Factor : Temp limitation if harmful precipitation is likely to occur.

6.Fabrication : Visual Insp.. Requirements, Distortion, color match

7.Work place location;

8.Application :For structural jobs aws gives pre-qualified wps with SMAW, SAW, GTAW, GMAW.

9.Equipment cost;

10.Safety aspects:

WELDING PROCESSES

SMAW : This process is widely used due to its portability,low initial cost & versatility . More useful for field & erection weld.

GTAW : This process is used for adaptability to certain material like s.s. titanium, al. Gives very high quality weld & giving low heat input.

SAW : This process gives very high production.. Generally Used for shop floor work & field work. The limitations are, can not weld in overhead position. Very heavy                  set-up & initial cost is very high.

WELDING PROCESS ARE BROADLY CLASSIFIED INTO

1.FUSION WELDING

2.PRESSURE WELDING

 

FUSION WELDING PROCESS

1.OXY FUEL WELDING                                     OFW

2.SHIELDED METAL ARC WELDING             SMAW

3.GAS METAL ARC WELDING                         GMAW

4.GAS TUNGSTEN ARC WELDING                  GTAW

5.SUBMERGED ARC WELDING                        SAW

6.FLUX CORED ARC WELDING                        FCAW

7.ELECTROSLAG  WELDING                             ESW

8.ELECTROGAS WELDING                                EGW

9.ELECTRON BEAM WELDING                         EBW

10.LASER WELDING                                              LW

11.THERMIT WELDING                                         TW

 

PRESSURE WELDING PROCESS

1.RESISTANCE WELDING   (SPOT, SEAM, PROJECTION)

2.FLASH BUTT WELDING

3.EXPLOSIVE WELDING

4.STUD WELDING

5.FRICTION WELDING

6.INDUCTION WELDING

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