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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gtaw welding advantages and disadvantages

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

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[…]

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5g 6G welding position

1G, 2G, 3G, 4G, 5G, 6G, 1F, 2F, 3F, 4F pipe and plate 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[…]

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introduction to welding, soldering and brazing

  Welding is a process of joining a metal into one due to heat with or without pressure effect or it can also be defined as a metallurgical bond generated by the attraction force between atoms. Soldering and brazing is a process of grafting metal which is used other metal connector in a liquid state which then frozen. Soldering is the process of connecting two pieces of metal with different metals which are poured in a liquid state with a temperature not exceeding 430 o C between the two pieces. The most widely used alloy / filler metal alloys are[…]

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