Page 16 - CITS - Welder - Trade Theory

WELDER - CITS

21 Welding symbols as per BIS & AWS, Reading of assembly drawings
22 Cast iron -types- properties and uses. Welding methods of cast iron.
23 Requirement for qualification codes Qualification, Different tests Writing
procedure for WPS and PQR
24 Safety GTAW & GMAW. Introduction to CO2 welding equipment accessories.
25 Modes of metal transfer, Welding parameters for GMAW M.S and Alloy steels,
related Tables, Data.
26 Welding wires used in CO2 welding, Shielding gases, Edge preparation, weld
defects, causes and remedy in GMAW

27 Flux cored arc welding, types coding as per AWS and specification - Trouble
shooting in MIG welding .
28 Introduction to GTAW, GTAW torches, Tungsten electrode. Pulsed TIG welding
29 Filler metals for GTAW Types & Specifications as per BIS & AWS.

30 Advantages of root pass welding of pipes by TIG welding Square wave
concept.
31 Types of weld defects, causes and remedy in GTAW process Purging.

32 Submerged Arc welding - Principles, application-Types of fluxes.
33 Micro plasma welding principles, Plasma cutting principles and advantages
34 Friction welding process: principles, Principles Friction Stir welding
35 Laser, Electron beam,Electro slag, Electro gas, Thermit welding etc.
Water jet cutting & laser cutting
36 Resistance welding processes, Spot, seam projection , Flash butt etc,

37 Robot Welding, Mechanical Testing, Hardness testing, Impact testing Tensile testing
38 NDT- DPT,MPT , UT , RT X-Rays, Eddy current testing .

Topic - safety precautions in shielding metal arc welding
(SMAW)

Objectives: At the end of this lesson you shall be able to
• identify the safety apparels and accessories used in arc welding
• select the safety apparels and accessories to protect from burns and injuries
• learn how to protect yourself and others from the effect of harmful arc rays and toxic fumes
• select the shielding glass for eye and face protection.

Introduction: Welding and cutting of metal involve intense heat and inflammable gas. Welding heat and the
sources employed to produce it can be potentially hazardous. Therefore, to protect person from injury and to
protect workshop, Equipment’s against fire
Types of safety
1 Personal safety.
2 Work shop safety.
3 Machinery safety.
Personal safety in SMAW-During ac welding operation, the following protecting clothing made of leather are
used to protect the welder’s body from on arc flash, heat, sparks and Spatters.
i Apron is used to protect the front body of a welder.
ii Gloves are used to protect the hand of a welder. Protect from electric shock. arc flash, Heat sparks and spatter.

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CITS : C G & M - Welder - Lesson 1-3 CITS : C G & M - Welder - Lesson 1-3