WQT.pptx

WQT By Mr. Deepak Rai

1. W elder Q ualification T est

2. General Arrangements for WQT : 1.Power Supply 2.Welding Machine 3.Welding Cable 4.Welding Holder

3. Tools & Machinery Safety PPE for Welder : 1.Welding Helmet 2.Welding Gloves 3.Safety Googles 4.Safety Shoes

4. Check list before starting the WQT : 1.Test Coupon Fit Up 2.Test Coupon Material Specification 3.Welding Position 4.Welding Process 5.Filler Wire & Electrode 6.Welding knowledge of Performer

5. Why check Test Coupon Fit Up? 1.We must identify the Root Gap, Mis Match, Overlap, Dimension of Test Coupon, Thickness Range.

6. 7 Why Test Coupon Material Specification? Material Specification is required before WQT. Based on material specification only we can approve the Filler Fire / Electrode, Pre-Heating. We have various types of material. CS, SS, GI, Alloy, Dissimilar, Etc..

7. Why Welding Position checking required? We have 6 types of Welding Positions. 1.Flat Position - 1G 2.Horizontal Position - 2G 3.Vertical Position - 3G 4.Overhead Position - 4G When it comes to Piping there are 4 Welding Positions 1.Rolling Horizontal Position - 1G 2.Rolling Vertical Position - 2G 3. Fixed Horizontal Position - 5G 4. Inclined Position (45° Angle) - 6G

8. What is Welding Process ? A Process which can describes how to weld in a process called Welding Process. There are 4 types of Welding Process. 1.GTAW : Gas Tungsten Arc Welding 2.SMAW : Shielded Metal Arc Welding 3.GMAW : Gas Metal Arc Welding 4.FCAW : Flux cored Arc Welding

9. Using of Filler Wire & Electrode Material Filler Wire & Electrodes must use as per material specification. Because every filler wire & electrode contains own mechanical prosperities. As per ASME Groups are segregated into Groups P Group A Group F Group

10. Why need to take interview of Performer? Welding performer must know about welding parameters, welding procedure, welding position, Welding process, Filler wire & electrode consumption & Identification.

11. Thank You for Your Support & Opportunity