Gas Metal Arc Welding (GMAW)

Gas Metal Arc Welding (GMAW) is also known as Metal Inert Gas Welding (MIG welding). In this process, consumable electrode is used in the form of wire and an inert gas such as Argon, Helium, Carbon dioxide or a mixture of them are used. These inert gases shield the weld pool from atmospheric contamination. The …

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Shielded Metal Arc Welding (SMAW)

Shielded Metal Arc Welding (SMAW) also known as Manual Metal Arc Welding (MMAW) is a manual arc welding process that uses a consumable electrode (covered with a flux). Electrode is connected with one terminal of the power source and the work is connected with the other terminal of the power source. Welding cable (or lead) is used for this purpose. …

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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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Types Of Welding – Classification of welding processes

Welding is a process of permanently joining two or more parts by the application of heat and (or) pressure. As per American Welding Society 50 different welding processes available today; some are very popular among the industries such as SMAW, GMAW, GTAW, SAW, FCAW etc. whereas some are very specific and limited to few industries …

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

Dye Penetrant Test (DPT) is also known as Liquid Penetrant Inspection (LPI) or Penetrent Test (PT). It is one of the most widely used Non Destructive Test (NDT) methods. It can be used to inspect almost all non-porous materials such as metals, plastics, ceramics etc. We can detect any surface discontinuity (or flaw) such as surface …

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Welder Qualification Test (Performance Qualification)

Welder Performance test is also known as welder qualification test or Performance qualification test. Welder performance test is a very basic and most important step before assigning the job to a welder. The performance qualification test is done to determine whether the welder or the welding operator can produce a sound weld or not. Each …

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