Month: August 2017

TIG Welding (GTAW) Electrodes

In GTAW (Gas Tungsten Arc Welding) also known as TIG welding (Tungsten Inert Gas welding), a non consumable electrode (made up of Tungsten) is used. Tungsten is preferred due to high its high melting point (approximately 3,4100C) and high hardness. Either pure tungsten is used as electrode or it can be alloyed with other elements. …

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Welding Positions

This article is about different welding positions used in Plate Welding, Pipe Welding & Stud Welding. Plate Welding Positions In plate welding, we have four different positions namely; Flat position (1G or 1F) Horizontal Position (2G or 2F) Vertical Position (3G or 3F) Overhead Position (4G or 4F) Note: 1. G Designates groove welding (V-groove, …

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welding electrodes

Welding electrodes – Understanding the SMAW electrode symbols

Shielded Metal Arc Welding (SMAW) electrodes are designated by “E” followed by four (or five) digits for example: E7018, E6013 or E10018. I will explain the meaning of these symbols: IF THE ELECTRODE HAS “E” FOLLOWED BY FOUR DIGITS (FOR EX. E7018) E – Stands for electrode XX – First two digits designates the minimum …

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liquid penetrant inspection

Dye Penetrant Test (DPT, LPI, PT) – Non Destructive Test

Dye Penetrant Test (DPT) is one of the most inexpensive non-destructive test (NDT) methods, used to check the surface irregularities of any component. This test method is popular by many names, which are as follows; Liquid Penetrant Inspection (LPI) Liquid Penetrant testing or Liquid Penetrant test (LPT) Penetrant Test or Penetrant Testing (PT) The liquid …

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welder qualification test

Welder Qualification Test (Performance Qualification)

Welder Performance Qualification (WPQ) is also known as Welder Qualification Test (WQT) or Performance Qualification. It is a very basic but one of the most important steps before assigning a job to the welder. The welder qualification test (WQT) is performed to determine the skill of a welder or in other words, we can say …

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