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[…]

Read more
lrut gwt guided wave technology

what is pipeline definition?

understanding a pipeline A pipeline is a structure designed to transport liquid, gaseous, and solid (bulk) products. Pipelines consist of straight sections of pipes tightly interconnected, parts, shut-off and control valves, instrumentation, automation, supports and suspensions, fasteners, gaskets and seals, as well as materials used for thermal and anti-corrosion insulation. Pipeline parts are the connecting parts that are used in the construction of pipelines for various purposes, necessary for bending, bending, bending, changing the diameter of the pipes and in the case when the pipeline is temporarily not used. Parts are connected when installing the pipeline, as a rule, butt[…]

Read more
CSWIP 3.0 Visual Welding Inspector exam and training

CSWIP 3.0 TWI Visual Welding Inspector for plate

Certification for welding inspector 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 designed[…]

Read more
ultrasonic pipeline inspection by pigging

pig cleaning system

what is pig cleaning system? each oil and gas company is required to carry out pipeline inspection activities. Inspection methods that are often used vary according to company requirements. starting from UT conventional, LRUT, MTM, visual inspection to the most sophisticated method, namely ILI or often called pigging. based on my 15 years of experience in the inspection field, this pigging method is the most perfect inspection method with a relatively cheap price compared to the LRUT method. This pigging inspection process is carried out by inserting pig in the pipe without interrupting the pipe operation or stopping the flow[…]

Read more