Dear sir / experts,
I need help for welding a M.S. Pipe with Mechanized FCAW Process for root pass to get good penetration for X-ray ( without backing strip & back gouging ) Wire, E71T-1. Dia, 1.2 mm. Shielding Gas, 100 % CO2. Pipe Dia 200mm. Wall Thickness 08.00mm. Welding Position 1GR.
Please give me some guidelines for above welding operation . Like, voltage, Amps, and wire speed, travel speed, stick out, torch angle, gas flow rate for root run & other subsequent run.
Few Engineers say that FCAW are not be recommended for open root run. They advised for root run weld with GMAW process & subsequent run by FCAW process. And I found in ESAB Welder Guide Book . Page No. 16. they are also not recommended root run by FCAW. on Pipe & Plate both.
My queries are as follows :
1. Is it possible to weld a root run for X quality penetration with FCAW Process?
2. There is any restriction for root run welding with FCAW by any Welding Codes like ASME Sec. IX, AWS D1.1. or ISO 15614. ?
Thanks & Regards.
G. K. Banerjee.
Welder Trainer.
NAGPUR. ( India )
M-09764555112. 09423632112.
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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