We use cookies to help you navigate efficiently and perform certain functions. You will find detailed information about all cookies under each consent category below.
The cookies that are categorized as "Necessary" are stored on your browser as they are essential for enabling the basic functionalities of the site. ...
Necessary cookies are required to enable the basic features of this site, such as providing secure log-in or adjusting your consent preferences. These cookies do not store any personally identifiable data.
Functional cookies help perform certain functionalities like sharing the content of the website on social media platforms, collecting feedback, and other third-party features.
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics such as the number of visitors, bounce rate, traffic source, etc.
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Advertisement cookies are used to provide visitors with customized advertisements based on the pages you visited previously and to analyze the effectiveness of the ad campaigns.
A comment from a member of our “Weld Purging Best Practices” group on LinkedIn, reads as follows:
“I have used solar flux in place of purging where purging was too difficult and the weld quality was not high purity. The result was Ok at best and only good for one pass.
Once the second pass was produced the solar flux burned away leaving a root pass contaminated.
I am very hesitant to use anything other than high purity shielding gas purging in conjunction with my Weld Purge Monitor®.
After welding for 40 years I have found that working conditions, welding procedures and purity acceptance criteria may dictate what you are permitted to use.
In addition to this a new filler metal that eliminates the need for back purging may work fine in controlled environment but if it is not part of the accepted filler metal grouping recorded in the welding procedure PQR.
The welding procedure must be re-certified before this new wire can be used for any production weld.”
There has been quite a deal of discussion about fluxed wires, rods and pastes in our “Weld Purging Best Practices” group.
From my experience, I have to agree with Dave.
If you have to make 'Critical' joints, then don't go the flux route.
Better to TIG/GTAW the root with a good gas purge and keep the Weld Purging System in place for the next two passes as well and ensure that the interpass temperature has dropped below 150ºC (302ºF) before turning the gas off and removing the weld purge system.