gtaw welding definition

The effect of welding flame heating on the weld structure and the weld heat affected zone

weld heat affected Zone The welded joint can be divided into three main zones having different micro structures: base metal zone; heat affected zone; and a weld seam weld zone. In gas welding, due to slow heating , the heat affected zone (near- heat zone) is larger than in the case of arc welding . The thermal influence zone has several structural sections caused by the heating temperature in the range of 450-1500 ° C and differing in the shape and structure of the grain. The thermal influence zone consists of the following sections: incomplete fusion overheating normalization incomplete re-crystallization[…]

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CSWIP 3.0 Visual Welding Inspector exam and training

CSWIP 3.0 TWI Visual Welding Inspector for plate. a Course and exam guideline

Certification for welding inspector course During the fabrication process of equipment, we often encounter the welding process. Welding inspector officers have the duty to maintain welding quality. This QA / QC process starts from weld preparation, weld process and after welding. The welding inspector has several kinds of certifications. For Europe, we are familiar with welding inspectors CSWIP 3.0 and CSWIP 3.1. In November 2019, I took part in the training and examination of the CSWIP 3.0 Welding Inspector certification in addition to my previous competence, which was a certified welding engineer. The CSWIP 3.0 Visual Welding Inspector course is[…]

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arc welding basics

understanding arc welding basics

Arc Welding Welding can be defined as “the operation that produces coalescence of two or more members by applying heats or pressure or both, with or without the use of filler metal” . Welding (Metallurgical joining) can further be classified by the joining mechanism into 4 groups : Fusion welding ( can be referred to as welding in the narrow sense), solid phase joining (pressure welding), diffusion welding and joining by liquid-solid phase reaction (Brazing & soldering). Fusion welding consist of 5 categories : gas welding, arc welding, electroslag welding , thermite welding and high energy beam welding (electron beam[…]

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welding procedure specification pdf

what is Welding Procedure Specification (WPS) definition ?

Welding procedure specification (WPS) Some of the EPC activities that are critical in the oil and gas industry are welding. Welding is carried out when the EPC enters the third phase, i.e construction, for example when manufacturing pressure vessels, storage tanks, process piping, and pipelines. Welding is also often done at the time after the EPC project is finished or Plant has started up, for example when there is an improvement or when Turn around. Welding that is done when the plant is operational has a much greater hazard than when the EPC project. When the plant is operational, there[…]

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