what is gas tungsten arc welding definition advantages and disadvantages

what are the advantages and disadvantages of gas tungsten arc welding (GTAW)

What is gas tungsten arc welding (GTAW)? GTAW or gas tungsten arc welding process is a manual welding process that can only be done by an experienced welder. GTAW produces excellent quality and excellent welding quality. This process is often used for pipe welding or pressure vessels with special materials such as high-temperature steel, stainless steel or high strength steel. This GTAW welding process is also often used with the SMAW process, which is in the root (which requires good and clean quality) using the GTAW process and is followed by a faster SMAW process. GTAW (Gas Tungsten Arc Welding) is an electric arc welding process using non-melted electrodes. In this GTAW welding, the electrode or tungsten is only functioning as an arc producer when it comes to contact with the workpiece, while the filler material is the filler rod. This GTAW welding is also often referred to as Argon[…]

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1G, 2G, 5G, 6G pipe welding position

what are the 1G 2G 5G 6G pipe welding positions? In the construction phase of a project in the oil and gas industry, we often find welding activities on pipes or welding on tanks. To maintain the quality of welding, professional organizations (ASME, AWS, ISO, JWES) make rules and classification of welding positions. All welder involved in construction needs to be certified according to these positions. In general, the pipe welding position is divided into 2 types, namely the welding position on the groove joint and the welding position on the fillet joint. Mostly welding connections on pipes use groove joints type so we often hear the term pipe welding position. The pipe welding position is divided into 4 groups, namely 1G, 2G, 5G and 6G. There are two aspects of welding; skill and knowledge. The skill of the welder is evaluated by welder performance qualification. This is an important[…]

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welding inspector job and responsiblity

responsibility of welding inspector in Oil and Gas Project

welding inspector jobs In construction work at Oil and gas company, we often install equipment tanks, pressure vessels, and pipeline or piping. the work that we often find is welding. workers involved in welding are welding coordinators, welding engineers, welding supervisors, welding inspectors, welder, and NDT inspector. a welding inspector is responsible for ensuring or maintaining the quality of welds or Quality Control (QC) of a welding product in accordance with specified standards such as ASME, AWS, API or JWES. The task of welding inspectors in the field is not limited to inspections, but they also sometimes have the task of making welding maps, making reports, carrying out NDT tests such as Test Tests, UT and MT (if they have the ability or certificate in accordance with the test). Some companies want a welding inspector to function as an NDT inspector to improve efficiency and competitiveness. If you are interested[…]

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API 1104 Welding recommendation for pipeline

Welding Code and standard There are 2 Welding code or standard that widely used in Oil and Gas facilities. ASME Boiler and Pressure Vessel Code (BPVC) section 9 provide welding requirement and specification used for Boiler, Pressure Vessel, Process Piping, Power Piping and other facilities. This section 9 is very famous and well known in engineering, welding and inspection community arround the world. API 1104 The second book is API 1104. This standard covers the gas and arc welding of butt, fillet, and socket welds in carbon and low-alloy steel piping used in the compression, pumping, and transmission of crude petroleum. petroleum products, fuel gases, carbon dioxide, and nitrogen and, where applicable, covers welding on distribution systems. It applies to both new construction and in-service welding.The welding may be done by a shielded metal-arc welding, submerged arc welding, gas tungsten-arc welding, gas metal-arc welding, flux-cored arc welding, plasma arc welding,[…]

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