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 welding, it is because the protective gas used is Argon gas.  GTAW is also called Las TIG which has a Tungsten Inert Gas extension, this difference is just a mention. If GTAW is more frequent for American terms while TIG is for the European region. Unlike simple welding methods which[…]

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1G, 2G, 3G, 4G, 5G, 6G, 1F, 2F, 3F, 4F pipe welding position

What is the welding position? Welding Position is the type or position of the connection to be welded, this welding position is based on the material or product to be welded. In welding technology, all of them have coding based on the type of connection. For fillet connections, it is symbolized with positions 1F, 2F, 3F, and 4F, while for groove or bevel connections it is symbolized by 1G, 2G, 3G, and 4G. Fillet weld is a method for combining two parts of metal vertically or slightly at an angle. They are also known as T connections or Lap connections (Lap connections are when pieces of metal overlap and the edges are welded). Welds are in the form of triangles and are commonly used when connecting pipes. This is also called closed welding because the weld metal does not need to be cut to join. Groove welds are made in metal grooves that will be joined. Need full penetration to have strong joints. This weld is used for the tip and butt joint connections. Groove welds are stronger than fillet welds. In general, basic welding positions consist of 4 types namely flat position, horizontal position, vertical position, and overhead position. In[…]

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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 in becoming a Welding Inspector, then you must be able to study metallurgy, basic mathematics and be able to understand terms in the Code or standard engineering. Other knowledge that you must learn is knowledge of Materials, Consumable, Welding Process, Heat treatment, Inspection, Drawing, Reporting and communication skills. The welding[…]

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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, oxyacetylene welding, or flash butt welding process or by a combination of these processes using a manual, semiautomatic, or automatic welding technique or a combination of these techniques. The welds may be produced by position or roll welding or by a combination of position and roll welding. This standard also[…]

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