How To Weld Pipe Fittings ?

 

Welding a pipe involves joining two pipes together in a process called welding. Welding techniques used for pipework include arc welding, as well as MIG or TIG welding, which are both arc welding processes. The term pipeline welding is sometimes used to refer to the pipelines that transport gas, water, oil, and other liquids over a wide distance. Some people make a distinction between pipe welding and pipeline welding, where pipe welding refers to pipes that transport metals and liquids within plants and refineries.

Pipe and pipeline welders perform various tasks that require welding skills, such as welding in the construction industry, the oil and gas industry, the water industry, fabrication shops, and nuclear power stations. A pipe welding job is generally conducted in order to turn old pipes into new ones by welding them together and then repairing them in accordance with relevant codes and standards.

Types Of Welding Used

There are several arc welding processes that can be used for welding pipe and pipelines, including the following:

1. Shielded Metal Arc Welding (SMAW)

The process of shielded metal arc welding (SMAW) can be referred to as Manual Metal Arc Welding (MMA or MMAW), Flux Shielded Arc Welding, or Stick Welding.

 

It is also called stovepipe welding, and is often used for welding pipes because flux or shielding gas is not required during the welding process, making the welding equipment simple to use and portable. The metal is welded by melting the electrodes using the heat that is generated by an electric arc, which melts the electrodes in the process. There are some advantages to the SMAW as it has a slow travel speed, but this does not mean that it is as productive as other methods due to its slow travel speed.

2. Gas Metal Arc Welding (GMAW)

A process called Gas Metal Arc Welding (GMAW) includes the use of both MIG and MAG gases to weld the metal together.

The process of welding with these techniques can offer greater productivity than with SMAW, but there is also need to better control the variables in the welding process in order to achieve high-quality, efficient results. As GMAW is usually performed with semi-automated or fully-automated equipment, it brings high deposition rates with little fume generation to the table.

3. Flux-Cored Arc Welding (FCAW)

Flux-Cored Arc Welding (FCAW) – A type of welding that includes both self-shielding and gas-shielding.

In the gas-shielded FCAW welding process, semi-automatic machines are used in order to provide high-productivity welding solutions for pipes, although windy conditions can disturb the shielding gas and result in porosity defects. A self-shielded FCAW avoids this problem by not using a shielding gas to shield the source of energy, but it has a low deposition rate as well.

 

 

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