what is shielded metal arc welding

what is SMAW – Shielded Metal Arc welding?

what is Shielded Metal Arc welding? Welding can be defined as “operation that produces coalescence of two or more members by applying heats or pressure or both, with or without the use of filler metal.” In fusion welding, members to be joined (base metals) are heated to melt with or without the use of filler metal (e.g. covered electrode), and then the molten parts produce coalescence of the base metals, followed by solidification. In pressure welding, the joining parts are given the thermal energy by friction or gas flame, and then mechanical pressure is applied to complete the welding process. In brazing or soldering, the brazing filler metal or solder that has a lower melting point than the base metal is fused, without melting the base metal, and then the fused filler metal is distributed between the closely fitted faying surfaces of the joint by capillary action. The brazing process[…]

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welding procedure specification smaw

what is Welding Procedure Specification (WPS)?

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, ie 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 are two things that must be considered, namely Process safety and personal safety. while at EPC, focus more on personal safety. to ensure welding can be carried out safely and technically accepted, it is necessary to make welding procedures that meet the requirements. This procedure is often referred to as[…]

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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 positions

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

what are the 4 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. 1G pipe welding position this is the easiest welding position. 1G welding position is a position where the pipe is in a horizontal position and the pipe[…]

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