Hi Dias,
The reason Vertical Weling is a challenge is combating gravity, For vertical SMAW E7018 is most suitable electrode because of their low iron pwder content, the molten metal produces a puddle that can freeze quickly and is less inclined to drip off the work during liquid state, also note E7018 is low hydrogen electrode.
If you want to make an effort to increase deposition rates choose small diameter (1.2mm) gas shielded FCAW electrode E71T-1 or E71T-12, offer good eposition rates when used for Out of Position welding, the slag is designed to support the puddle when welding vertical up or overhead.
Please recheck Client spec carefully since some of the client spec i am aware restrict Vertical welding to upward direction only and need approval for Downwards, Also changing Up to down is supplemetary variable in ASME sec ix,
I would suggest to go with FCAW widely used with succesful maechanical results.
Should you have further query, please let me know.
Regards
Manpreet Singh
From: "Hepolito Dias"hepolitodias@gmail.com
Sent: Wed, 29 Jun 2011 17:38:19 +0530
To: materials-welding@googlegroups.com
Subject: [MW:11502] vertical down welding qualification
Hello all
we are on a regular basis doing a job involving a lot of vertical welding of stiffeners 16 mm thk base metal general carbon steel 0.1 to 0.2 C group.
The same is as per client specs being done by E 7018 in normal position.
Iam looking for details on qualificationand approvals in vertical down positionif anyone has the samefor SMAW or even MAG using low hydrogen electrodes like E 7016 [or equivalent in MAG ] to reduce production time on the job drastically.
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