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AnswerNitrogen is used to prevent porousity in the welding member by preventing oxygen and air from entering the molten metal during the welding process. Other gases are also used for this purpose such as Argon, Helium, Carbon Dioxide, and the gases given off when the flux burns away during SMAW (stick) welding.They provides a shielding effect which make a barrier between the outside oxygen and molten metal.The formation of oxide reduce the strength of the weld.
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Can nitrogen be used to purge gas pipes before welding?

Yes, and No, Nitrogen can be used to purge gas lines prior to welding, but the correct answer depends on several things, mainly, your welding application. A significant amount of resistance welding applications use N2 as a suitable environment for welding. Other applications use N2 as a purge gas, and then purge the N2 with the process gas. That said, if you were going to be using a different inert gas (Argon, Helium, Xenon, etc.) to provide the actual the actual shield for the weld, then you would still need to displace (purge) the N2 from the lines. The last statement leads to the question of; if you are going to have to purge the lines anyway, why do it twice? The answer to this question is pretty basic. Nitrogen is cheap. If you had to purge a lot of lines, or a large volume of space, you would rather use N2 to drive out the Oxygen and lower the dew point (moisture). Using one of the other welding gases would cost about ten times as much to perform the operation.


What is the welding cert roster code for welding?

roster welding


Difference between ERW and SAW welding?

SAW welding is a type of arc welding while ERW welding is spot or seam welding. SAW stand for submerged arc welding while ERW stands for electric resistance welding.


What are smaw welding?

smaw welding is sheilded metal arc welding


What is the difference between ultrasonic welding and radio frequency welding?

what is the difference between ultrasonic welding & radiographic welding

Related Questions

Does Home Depot sell liquid nitrogen?

No. You can get it at a welding supply store.


Explain the role of a clover in the nitrogen cycle?

The role of clover in the Nitrogen cycle is to pull Nitrogen from the air back into the soil.


What is the role of nitrogen plays as essential to the production of proteins?

the role of bacteria in nitrogen fixation


What organisms play a role in the nitrogen cycle?

Producers (incorporate it into organic) and bacteria play a major role in the nitrogen cycle.


What is a plant's role in the nitrogen cycle?

Plants consume nitrogen in the form of Nitrates. Nitrogen gets converted into nitrates by the denitrifying bacteria. These plants absorb nitrogen in the form of nitrates through the groundwater.


Role that nitrogen plays as essential to the production of proteins?

Nitrogen is a key element. Proteins contain nitrogen and without nitrogen no protein.


How do legumes play a role in the nitrogen cycle?

Legumes play a crucial role in the nitrogen cycle by hosting nitrogen-fixing bacteria in their root nodules. These bacteria convert atmospheric nitrogen into a form that plants can use, enriching the soil with nitrogen and promoting plant growth.


Where can you buy liquid nitrogen?

Liquid nitrogen is typically available for purchase from gas suppliers, welding supply stores, or industrial gas companies. However, it is important to adhere to proper safety protocols when handling and storing liquid nitrogen.


What is nitrogen and oxygen used for?

Nitrogen is used in various industries such as food packaging, electronics manufacturing, and pharmaceuticals. Oxygen is essential for respiration in living organisms and is also used in medical applications, welding, and steel production.


What role do nitrogen-fixing bacteria play in the process of nitrogen fixation?

Nitrogen-fixing bacteria play a crucial role in the process of nitrogen fixation by converting atmospheric nitrogen into a form that plants can use for growth. This helps in maintaining the nitrogen cycle and ensuring the availability of essential nutrients for plant growth.


What role does nitrogen provide to the human cell?

Nitrogen is normally not used by the human cell.


What is the role of nitrofying bacteria?

Convert gaseous Nitrogen into nitrogen compounds.