5 Helpful Tips for Inert Gas Weld Purging of Pipes

5 Helpful Tips for Inert Gas Weld Purging of Pipes

The inert gas weld purging of pipes is crucial in monitoring residual oxygen being displaced from the purge. Inserting inert gas into a weld can reduce the risk of fire or explosion and help prevent an ignitable atmosphere. Weld purging removes oxygen, water vapor, and other gases that might be harmful to the welded joint. Here are five helpful tips for inert gas weld purging of pipes.

Find the Appropriate Level of Oxygen

When welding two pieces of metal together, it is vital to know the maximum oxygen percentage needed to prevent the weld’s loss of mechanical or physical properties. When you are joining metals such as titanium, zirconium, or stainless steel, oxygen levels are more critical to the life of the welded joint.

Have a Complete Purging System

This step is essential for proper purging every single time. Intercon Enterprises offerspip welding purge kits that will help you in this process. Sticking with the same routine ensures the job is done properly for every purge.

To make your job even more accessible, you can purchase equipment that will pre-set characteristics like gas flow, oxygen levels, and pressure. This will not only save you energy but also ensure the job is done the same each time with attention to high-quality control.

Insert the Inert Gas Gradually

When you purge a weld, you eliminate any gasses that could cause discoloration, oxidation, or corrosion. Inserting the gas gradually gives you more control and better results. Heavier gases should be inserted at the bottom of the weld purge and discharged from the top. Lighter gasses use the same technique, but vice-versa.

Maintain a Seal at Either End

When attempting a weld purge, both ends must be sealed correctly. This eliminates the possibility of unwanted oxygen from entering the chamber. Materials like wood, cardboard, or foam are highly susceptible to fires and should be avoided when sealing your weld purge.

Never Rush a Weld Purge

Rushing a weld purge after joining two metals together is never a good idea. Being safe and checking your work twice can save you bundles of time if done the first time correctly. Have patience and wait until all the air has been displaced and residual oxygen levels are below 100 ppm.

Purging a weld maintains a clean practice with the highest quality of products. Impress your employer with a job well done. It is always necessary to play it safe when it comes to inert gas weld purging of pipes to minimize mistakes and have a cleaner product.


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