no nosigma, if we were to use those little peanut welders out in the oilfields they would burn up in a less than a week those machines are only capabile of a max of 3/16 steel, the metal we weld on is a minimum of .22" thick and we seldom ever use schedule 40 3 inch pipe anymore, most of the time we weld on sched. 80 which is .3, and earlier this year we welded some schedule 160 3 inch which is almost a 1/2 inch thick... and we will do 21-42 inches an 8 hour day (3-4 passes around the pipe = one 3" weld)
so no short rod or weak arc... its what has to be used for the work we do, its just those little 90 amp welders are kinda cute after you get used to a 300 amp welder... we weld between 90-140 amps on schedule 80 pipe and more depending on the application.
its kind of like this... how much more reliable will a motor be if you ran it at half its maximum power vs full power all day long... the lincoln 300D classic we use will be good for 10+ years running 5 days a week prolly 4-6 hours out of the day... what can you say for those pocket welders that put out a m ax of 90 amps with 120 volt plugs?... further more, when your power goes out in your house... these welders could drop 9000 watts no problem and power everything in your house until the power came back on...
either way im done trying to explain why we use 300 amp welders vs ur little 90 amp pocket welders.