Preheating – How, When and Why
Heating the base metal to a specific desired temperature before welding is called as preheating. The temperature at which the
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Author: Sandeep Anand
(SAW) Submerged Arc Welding
Submerged Arc Welding (SAW) is an arc welding process in which arc is generated between a bare electrode and the
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(FCAW) Flux Cored Arc Welding
Flux cored arc welding (FCAW) is a welding process that uses the heat produced by an arc generated between a
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(UT) Ultrasonic Test Basics
High frequency sound waves (frequency > 20000 HZ) also known as ultrasonic waves are introduced in a test object through
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Angle Probe Calculation for UT
SELECTION OF PROBE ANGLE: There are three methods for selecting a probe angle, these are: Based on groove angle:
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Visual Inspection of Weld Joints
Visual examination of weld joint is an important activity, carried out to check the integrity and soundness of the weldment.
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Gas Tungsten Arc Welding (GTAW/TIG)
Gas Tungsten Arc Welding (GTAW) is also known as Tungsten Inert Gas Welding (TIG Welding). It is an arc welding
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How to write a Welding Procedure Specification (WPS)
A welding procedure specification (WPS) is a written document providing direction to the welder (or welding operator). It contains all
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ASME Codes and Standards – A summary
Sections of ASME Boiler and Pressure vessel Codes (BPVC) The following list includes some of the most widely used Boiler
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Welding Defects
Any discontinuity (or irregularity) in the weld metal, which exceeds the applicable code limit, is termed as a WELD DEFECT
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Development Of Radiography Film
About radiography films: Radiography films are primarily made up of two things; 1. Base 2. Emulsion Base: Base is a
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Radiography Test (RT)
Radiography testing (RT) is one of the most widely used non destructive test (NDT) method. With the help of this
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Preparatory Questions (Set – 7)
1. Which of the following butt weld preparations is generally most susceptible to lack of side wall fusion during MMA
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Preparatory Questions (Set – 6)
1. Which of the following processes joins metals plastically? Friction welding Resistance welding Plasma welding None of the above 2.
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Preparatory Questions (Set – 5)
1. Which of the following NDT methods can only detect surface breaking defects? MPI DPI UT RT 2.
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Preparatory Questions (Set – 4)
1. Which of the following does not require baking; E 6010 E 7018 Both a & b None
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Preparatory Questions (Set – 3)
1. Overlap in welds could be influenced by: Welding process Welding position Poor welding technique All the above 2. In
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Preparatory Questions (Set – 2)
1. Stress relieving is not helpful in which of the following cases? Softening the steel Lowering the peak residual stress
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Preparatory Questions (Set – 1)
1. The Discontinuity which results from the entrapment of gas within the weld cross-section is known as: Undercut Lack of
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Welding Symbols (Part -1)
Welding symbols are a set of information conveyed by the design department to the welding Engineer and the welding operator.
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Types of weld joints
The American Welding Society defines a joint as “the manner in which materials fit together.” there are five basic types
Read moreTIG Welding (GTAW) Electrodes
In GTAW (Gas Tungsten Arc Welding) also known as TIG welding (Tungsten Inert Gas welding), a non consumable electrode (made
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This article is about different welding positions used in Plate Welding, Pipe Welding & Stud Welding. Plate Welding Positions In
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Types of steel – Classification of steel
Based on the chemical compositions, Steel can be categorized into four basic groups: Carbon Steel Alloy Steel Stainless Steel
Read moreGMAW (MIG Welding) electrode specification
GMAW (MIG welding) electrodes are designated by some letters and numbers such as ER70S-6, ER90S-6 and E308L etc. I will
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Gas Metal Arc Welding (GMAW/MIG)
Gas Metal Arc Welding (GMAW) is also known as Metal Inert Gas Welding (MIG welding). In this process, consumable electrode
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