April 2019

How to calculate heat input

Heat input is a critical parameter for arc welding processes and it must be controlled to ensure sound weld quality. Heat input may be defined as “The amount of electrical energy that is supplied to a weld during the welding process”. How to calculate Heat input? There are several ways of calculating the heat input.

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Plasma Arc Welding (PAW)

Plasma arc welding (PAW) is an arc welding process in which the heat required for welding is generated by a constricted arc between a non-consumable electrode and the workpiece. Plasma Arc Welding is essentially an extension of Gas Tungsten Arc Welding (GTAW). Like GTAW, a non-consumable electrode is used in Plasma Arc Welding (PAW). However,

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Acceptance Criteria for Weld Defects

In this article, the weld defect acceptance/rejection criteria are given for the following tests/NDT; 1. Acceptance criteria for Visual Inspection 2. Acceptance criteria for Radiography Test (RT) 3. Acceptance criteria for Ultrasonic Test (UT) 4. Acceptance criteria for Liquid Penetrant Test (LPT/LPI/DPT) 5. Acceptance criteria for Magnetic Particle Test (MPI/MPT/MT) (This article covers the weld

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