Basic Welding joints

• Types of weld
• Root gap
• Heat affected zone
• Leg length
• Parent metal
• Fusion penetration
• Reinforcement
• Root
• Root face
• Root run
• Root penetration
• Run
• Sealing run
• Backing run
• Threat thickness
• Toe of weld
• Weld face
• Weld junction
• Fusion face
• Fusion zone 

Methods of pipe welding by Arc

• Advantages of welded pipe
• Methods of pipe welding
• Types of pipe joints
• Welding of pipe butt joints
• Pipe welding positions
• During the welding of butt joints the pipe may be
• Pipe welding by arc by continuous rotation method
• Setting the pipe for welding
• Welding of a pipe butt joint by segmental welding 

Pipe welding by Arc in fixed positions

• Welding procedure of M.S pipe butt joint by arc in fixed (5G)  position
• Advantages of H/P pipe welding

Principle of arc welding

• Metallic arc welding

Basic electricity as applied to welding

• Cooper
• Ohm’s law
• The law states
• Application of ohm’s law

Polarity in DC Arc welding

• Arc length and its effects
• Arc length
• Medium, normal arc
• Long arc
• Short arc
• Effects of different arc length
• Arc welding electronics
• Method of flux coasting
• Coating factor
• Storage of Electronics
• Remember a moisture-affected electrode
• Always pickup the right electrodes that will provide
• Storage of electrodes
• Drying electrodes
• Indicates of electrodes affected by moisture are

Tig Welding process and equipment

• TIG welding
• TIG welding equipment
• Gas regulator, flow meter
• Advantages of Tig welding process

Power source of Tig welding – types, applications – care and maintenance

• Power source for GTAW
• Types of power source

High frequency unit and DC suppressor unit

• High frequency unit
• Care and maintenance of HF unit

Properties and uses of Argon and helium gas – ceramic shield

• Shielding gases
• Properties of argon and helium gas
• Gases for TIG welding of aluminum Argon gas

Tungsten electrodes – type – uses

• Tungsten electrodes
• Electrodes of four different types are used
• Composite tungsten electrode with strips of tungsten with thorium attached
• For edge wleds
• Current density

Weld symbol and welding symbol-Description and uses

• Necessity
• Elementary symbols
• Supplementary symbols

Inspection of weld (NDT) Visual inspection

• Necessity of inspection
• Types of tests
• Visual inspection before welding
• Visual inspection during welding
• Cheackpoints for inspection
• Testing welds
• Necessity of testing of welds
• Types of testing
• Non-destructive testing (NOT)
• Destructivetesting

Methods of Non-distructive tests

• Common non-distructive testing
• Special non – destructive tests
• Liquid penetrant test

Apply for Certification

https://www.vskills.in/certification/Vskills-Certified-Pipe-Tig-and-Arc-Welder