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 such as USW, RSW, DW etc. Welding processes are broadly classified as fusion welding and….

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

Dye Penetrant Test (DPT) is also known as Liquid Penetrant Inspection (LPI) or Penetrant 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 cracks, porosity, pinholes etc. by this test method. Principle: DPT is based upon a natural….

Welder Qualification Test (Performance Qualification)

Welder Performance qualification (WPQ) is also known as welder qualification test (WQT) or Performance qualification test. Welder qualification test is a very basic and most important step before assigning the job to a welder. The welder qualification test (WQT) is done to determine whether the welder or the welding operator can produce a sound weld or not. Each welder or welding operator shall be qualified for each welding process to….

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