You can do following
Use lower dis filler wire dia 1.6
Use injection purging. Method means : inject. Gas from groove root gap
This shall ensure better quality of Welding
Vishwas -IWE
International Welding Engineer
Sent from my iPhone
On 06-Oct-2023, at 2:22 PM, tamilneethi thennavan <tamilneethi123@gmail.com> wrote:
Dear Mr.Alpesh,As your statement is wrong.as per API RP 582 Shielding and Purging Gases Clause 7.3 Back purging is required for the GTAW and GMAW processes for welding materials having a nominal chromiumcontent greater than 2-1/4 %,<Capture.PNG>So you better try back purging.......Thanks.Dear experts,We are facing problems with welding of SA 213 Gr T22 superheater tubes of thickness 2.9mm.Generally, back purging with inert gas in GTAW is not necessary for P22 as Cr is less than 3%. However, during welding without use of back purging, Oxide formation is happening. The construction of the equipment is such that, purging is very difficult to achieve.Kindly Guide us to eliminate the oxidation of root.Thanking you,Alpesh--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/e2e41e16-2ea6-419a-8e20-9121f424edd5n%40googlegroups.com.
----Regards,
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAM2rNBwHskCdax%3D7nfg6wfDJeOrDWBzgaN_pmec9t_12UNWE6w%40mail.gmail.com.
No comments:
Post a Comment