Trade Welder

Trade Welder

Knowledge in welding of joints uniformly by gas and arc welding, Weld ferrous and Non-ferrous metals to the requited standards and specialised welding like TIG, MIG, Plasma, Spot and Projection welding are imparted in this trade.

1. Set the gas welding plant and join MS sheet in different position following safety precautions. [Different position: – 1F, 2F, 3F, 1G, 2G, 3G.]

2. Set the SMAW machine and perform different type of joints on MS in different position observing standard procedure. [different types of joints- Fillet ( T-joint, lap & Corner), Butt (Square & V); different position – 1F, 2F, 3F,4F, 1G, 2G, 3G, 4G]

3. Set the oxy- acetylene cutting plant and perform different cutting operations on MS plate. [Different cutting operation – Straight, Bevel, circular]

4. Perform welding in different types of MS pipe joints by Gas welding (OAW). [Different types of MS pipe joints – Butt, Elbow, T-joint, angle (45) joint, flange joint]

5. Set the SMAW machine and perform welding in different types of MS pipe joints by SMAW. [Different types of MS pipe joints – Butt, Elbow, T-joint, angle (45) joint, flange joint]

6. Choose appropriate welding process and perform joining of different types of metals and check its correctness. [appropriate welding process – OAW, SMAW; Different metal

– SS, CI, Brass, Aluminium]

7. Demonstrate arc gouging operation to rectify the weld joints.

8. Test welded joints by different methods of testing. [different methods of testing- Dye penetration test, Magnetic particle test, Nick break test, Free band test, Fillet fracture test]

9. Set GMAW machine and perform welding in different types of joints on MS sheet/plate by GMAW in various positions by dip mode of metal transfer. [different types of joints-Fillet ( T-joint, lap, Corner), Butt (Square & V); various positions- 1F, 2F, 3F,4F, 1G, 2G, 3G]

10. Set the GTAW machine and perform welding by GTAW in different types of joints on different metals in different position and check correctness of the weld. [different types of joints- Fillet ( T-joint, lap, Corner), Butt (Square & V) ; different metals- Aluminium, Stainless Steel; different position- 1F & 1G]

11. Perform Aluminium & MS pipe joint by GTAW in flat position.

12. Set the Plasma Arc cutting machine and cut ferrous & non-ferrous metals.

13. Set the resistance spot welding machine and join MS& SS sheet.

14. Perform joining of different similar and dissimilar metals by brazing operation as per standard procedure. [different similar and dissimilar metals- Copper, MS, SS]

15. Repair Cast Iron machine parts by selecting appropriate welding process. [Appropriate welding process- OAW, SMAW]
16. Hard facing of alloy steel components/ MS rod by using hard facing electrode


• Can join industry as Technician and will progress further as Senior Technician, Supervisor and can rise up to the level of Manager.

• Can become Entrepreneur in the related field.

• Can join Apprenticeship programme in different types of industries leading to National Apprenticeship certificate (NAC).

• Can join Crafts Instructor Training Scheme (CITS) in the trade for becoming instructor in ITIs.

• Can join Advanced Diploma (Vocational) courses under DGT as applicable.


Welder, Gas; fuses metal parts together using welding rod and oxygen acetylene flame. Examines parts to be welded, cleans portion to be joined, holds them together by some suitable device and if necessary, makes narrow groove to direct flow of molten metal to strengthen joint. Selects correct type and size of welding rod, nozzle etc. and tests welding, torch. Wears dark glasses and other protective devices while welding. Releases and regulates valves of oxygen and acetylene cylinders to control their flow into torch. Ignites torch and regulates flame gradually. Guides flame along joint and heat it to melting point, simultaneously melting welding rod and spreading molten metal along joint shape, size etc. and rectifies defects if any.
Welder, Electric; fuses metals using arc-welding power source and electrodes. Examines parts to be welded, cleans them and sets joints together with clamps or any other suitable device. Starts welding power source and regulates current according to material and thickness of welding. Connect one lead to part to be welded, selects required type of electrode and clamps other lead to electrode holder. May join parts first at various points for holding at specified angles, shape, form and dimension by tack welding. Establish arc between electrode and joint and maintain it throughout the length of the joint.

Welder Entry Qualification & Course Durations – ITI

• Passed 8th class examination

• 1year.