ELECTRICAL CHARACTERISTICS (QW‐ 409) Process Weld Pass Amps (Range) SMAW Root pass 50 – 60 SMAW Hot Pass 100 – 150 SMAW Filling and Capping 100 ‐ 150
Volts (Ran (Range ge))
Curr Curren ent t
20 – 30 20 – 36 20 ‐ 37
Direct Direct Direct
Polarity
El E lectrode Positive Electrode Positive Electrode Positive
TECHNIQUE (Q W – 410)
Removal of line –Up Clamp: Bead Characteristics: Bead width Restriction: Orifice or Gas Cup size: Speed of Travel: Method of Inter pass cleaning:
After at least 65% of the Root Pass. Root by String bead others by Weave bead Max 3 times the electrode diameter N/A. 2.0 – 4.0”/min Grinding/ Mechanical Power Brush.
Time Lapse Between Completion of Root Pass and start of Hot Pass: Time Lapse Between Completion of Hot Pass and start of Other Passes: Minimum Number of passes Before Joint is Allowed to Cool:
5 Minutes Max 5 Minutes Max 3 Passes
Maximum Time Between Commencement and Completion of Weld: 45 minutes Type of Heater To be Used Propane Gas Torch With Rosebud Nozzle Peening NO To maintain the low hydrogen content, electrode shall be baked in accordance with manufacturer’s recommendation recommendation and transferred to heat quivers with minimum temperature of 70C We certify that the statements in this WPS are correct and were prepared, in accordance with the requirements of section IX of the ASME Code. o
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