Why do pipeliners weld downhill?

Why do pipeliners weld downhill?

On thinner-wall pipe, downhill welding enables operators to run “hot and fast,” increasing productivity compared to welding uphill, which is required on thicker wall pipe to increase heat input to ensure complete penetration.

How strong is 6010?

The “60” in 6010 means 60,000 pounds’ tensile strength (the ability to resist being pulled apart) per square inch. The “1” means it can be run in any position—flat, horizontal, vertical, or overhead.

What polarity would you use with an EXX10 electrode?

direct current electrode positive
EXX10 electrodes require direct current electrode positive (DCEP) polarity and more voltage than other electrodes. Power sources designed for running EXX10 electrodes have a high open circuit voltage (OCV), which is voltage at the electrode before the arc is struck.

What is the difference between 6010 and 6011?

6011 runs on AC and direct current electrode positive (DCEP), while 6010 runs only on DCEP. This gives 6011 an advantage if you have an AC-only machine. I have found, and think most welders will agree, that 6010 runs more smoothly. The slag chips off better than 6011, and this is one reason it is used more often than 6011 in root passes on pipes.

What is The 6010 uphill travel procedure?

The process is 6010 uphill travel root, hot pass, and cap. This is the procedure specified by our local utility company. There are procedures for downhill 6010 root, fill, and cap. The down hill travel is more common than uphill.

What is the difference between pipe weld 6010 and 7018?

It always hangs up on the root side much more than on the cover side.) The reason 6010 or a tig root is used for the root in a open but pipe weld is for quality. You cant put a x-ray quality weld using 7018 for the root pass. It will fail a x-ray every time.

Why do they use the 6010 for butt welding?

Yes, the 6010 freezes faster. It also burns at a lower temp, so it’s easier to weld with it on an open butt weld joint. This is why I think they use it…but others may have more info on it. I like to run a 3/32″ gap and use a 1/8″ rod. I push the rod in the keyhole far enough that very few sparks come out on me.