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Table 2. Proposed welding data for MCAW. • Tableau 2. Données de soudage proposées pour le procédé MCAW
Electrode wire classification/
Classification du fil-électrode
and the suggested parameters. In order to overcome objections
and assure proper welding technique, especially to eliminate
undercut at high currents and lack of fusion, it is suggested
that fabricators implement in-house training, and assure that
competent supervision or a lead welder be available to provide
guidance. Such training should also occur at community colleges,
where too often high productivity semi-automatic methodology
is ignored. In these very aggressive times with global
competition on many projects, sound technology and economics
must dictate shop floor practice.
Stig Skarborn is a civil/welding consulting engineer and principal of Skarborn
Engineering Ltd. in Fredericton, NB. Additional information is available at
www.skarborneng.com.
E491C-6M-H4 or/ou –H8 or/ou E492C-6M-H4 or/ou –H8
Shielding gas/Gaz de protection 90% argon, 10% CO 2
Electrical stickout/Longueur terminale 20-25 mm
Current and polarity/Courant et polarité DCRP/CCEP
Electrode sizes/Diamètres des électrodes 1.1 mm Alternative 1.3 mm
Wire feed speed (m/min)
Vitesse de dévidage (m/min)
10.2-15.2 7.6-10.2
Amperes/Ampères 265-335 300-360
Arc volts/Tension d’arc (volts) 25-28 25-27
Welding speed for 6 mm horizontal fillet weld (mm/min or in/min)/
Vitesse d’avance pour une soudure d’angle de 6 mm réalisée à l’horizontale (mm/
min ou po/min)
Where there’s pipe, there’s Mathey
MATHEY DEARMAN, INC.
4344 S. Maybelle Avenue
Tulsa, Ok USA 74107
Ph: 918 447-1288
Fax: 918 447-0188
Toll Free: 1 800 725-7311
sales@mathey.com - www.mathey.com
480-745
(19-29)
500-675
(20-26)
Figure 4. Desirable fillet weld geometry.
Figure 4. Géométrie d’une soudure d’angle voulue.
Durant les périodes très dynamiques comme celle que nous connaissons
actuellement, avec plusieurs concurrents qui veulent travailler sur le même
projet à l’échelle mondiale, c’est la technologie saine et l’économie qui dictent
ce qui se passe dans les ateliers.
Stig Skarborn est un ingénieur-conseil en soudage et en génie civil et le
directeur de Skarborn Engineering Ltd. à Fredericton, au Nouveau-Brunswick.
Pour plus d’information, consultez le site www.skarborneng.com.
ISSUES WITH HIGH TENSILE
STRENGTH PIPE?
The Mathey Dearman
MEGA RIM CLAMP
SAMPLE JOURNAL
designed for
TOUGH REFORMING JOBS such
as the alignment and reforming
of ultra-high tensile strength pipe,
including X65, X70, and X80.
MEGA RIM CLAMP:
the clamp with muscle
58 Canadian Welding Association Journal • Summer 2010
483291_Mathey.indd 1 6/30/10 4:51:22 PM