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N�IL ESHLEivIAN BLDG. C0. <br />Welding procedure Specification <br />SMAW A-61,5 Grade o0 #6 Rebar <br />2•6 Electrical Characteristicss <br />page 3 of 8 <br />Procedur� <br />2.6.1 SMAW process shall use direct current and reverse polarity• <br />2•6.z The range of voltage and amperage shall be in accoi•dari�e With <br />the I�JPS of this procedure. <br />2.7 Position and Weld Direction: <br />2.?.1 This procedure is qualified in the 2G fixed position. <br />Z.?.2 All welding progression shall be in a horizontal direction <br />only. <br />2,8 Time Lapse Between Passess <br />Time lapse between completion of the root bead and the start of the <br />second pass is restricted to maintaining an interpass temperature <br />of 300°F minimum. <br />2.9 Type of Line-up Clamps <br />2.9.1 If line-up clamps are required, they shall be of a mechan- <br />ical design only. <br />2.9.2 Alignment clamps may be releused and removed any tiw�� fol- <br />lowing co�r,pletion of the first pass. <br />2.10 Cleaning� <br />Power grinding, power brushing, hand brushing and filir.g in,��� be <br />used. <br />2.11 Preheat Temperature: <br />Preheat Temperature oi' not le�s than 300°F is required. <br />2,12 Interpass Temperature: <br />Interpass Temperature of not less than 300°F is required. <br />z,13 Speed of Travel: <br />Travel speed range al].owable shall be as shown on the WPS o�' this <br />procedure. <br />3,p Essential Variables: <br />Changes in this procedure, other than those listed below may be <br />made without the n2cessity for requalification. <br />1, Minimum p��eheat <br />2, Interpass temperature <br />� <br />�� <br />