![]() It's my experience that all groups ( welders, inspectors, fitters, and everything in between ) can help each other far more than they have been the past few years. ![]() A good test is worth more than a thousand opinions.Īs a general comment, getting hostile or rude serves no one nor a given purpose. The squarewave AC output may be the arc easiest to control in the open root. Welding 7016/18 with AC (if available) for the open root is a means of controlling the heat input. Lincoln also has the Pipeliner LH-D80 which is the 7048 which of course is a low hydrogen deposit with the capability of downhill travel. (2.4 &3.2mm) Root Pass DCEN 72 amps 19.6 volts Travel Speed Stringer 2.4 in./min (1.0 mm/s)" Esab has the Sureweld SW-70LA-2 (E7016) and Lincoln has the Pipeliner 16P which is a 7016 H4. According to the manufacturer, this low-hydrogen electrode was developed for uphill welding using either alternating current (AC) or direct current (DC) electrode negative (DCEN), or direct current electrode positive (DCEP) polarity, and for depositing root beads using DC with excellent weldability." "Table 1 - Welding Parameters Bevel Angle 37 1/2 degrees Root Face (land) 3/32 in.(2.4mm) Root Opening 1/8 in. "Fluor Corporation recently qualified and successfully completed the first production welds in North America using Bohler Thyssen's newly developed Thyssen Chromo T91 E 9018-B9-H4 electrode with the shielded metal arc welding (SMAW) process. July 2004 pp.38-41 Welding Journal "Welding Root Beads in P91". In this province we allow our welders to transfer from company to company without being recertified, other provinces will make you do a new test everytime you change company's. ![]() So now you have two certs, instead of one, for another 6 months. Also, Dr.D, if you were tested for f3/f4 in Jan.01/06, then you did another test (f4) in May 01/06, then automatically your f3/f4 will be renewed for another 6 months along with the f4. Maybe your country of origin is still different from ours. Here in Newfoundland we stand by the 6 month code (if you do not weld within the 6 month period, then your certs will expire), Alberta is 2 yrs I think Nova Scotia is one year and New Brunswick is 2 years. I'm Canadian and each province under the Provincial Boiler Regulations seems to interpret the code a little different. It is unfortunate that the ASME code, SectionIX is not interpreted by all inspectors equally. Having said that, if you are qualified to weld with f3/f4 (ASME Code), then if you upgrade and do another test (F4-open root joint) within 6 months, then your wider range of jobs will allow you to weld with either f3/f4 or f4-open root joint. D, you will only be qualified to weld according to your WPS.
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