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Oil Pipe Fencing
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<blockquote data-quote="greybeard" data-source="post: 1218277" data-attributes="member: 18945"><p>I've had good luck welding magnetized drill pipe and collars with 7018 (low hydrogen) rods. </p><p>The reason wrapping your lead around the pipe helps, is that when you weld two pieces together, you are trying to weld 2 magnets together and ends are of opposite magnetic polarity--each piece has a magnetic north and south pole. Even if you cut it into pieces, each cut piece will still have a N & S pole. Wrapping the lead degasses the pipe. The degaussing only works while you are welding--while current is flowing thru the lead. Once you are done, you will find the magnetic field has returned. Sometimes, wrapping doesn't seem to work, and the fix is to unwrap the lead, and wrap it again in the opposite direction--it does make a difference. The more wraps you make, the better it works. </p><p></p><p>Using AC instead of DC also makes it lots easier. Drill pipe and collars get magnetized by the rotation it experiences in the hole as it is turned within the earth's own magnetic field as well as when it is raised and lowered out of the hole--same with sucker rod. The tubing (just dropped down in the hole) becomes magnetized by that descent and from months and months of being down in strata that easily transmits the same Earth natural magnetic field to the tubing.</p></blockquote><p></p>
[QUOTE="greybeard, post: 1218277, member: 18945"] I've had good luck welding magnetized drill pipe and collars with 7018 (low hydrogen) rods. The reason wrapping your lead around the pipe helps, is that when you weld two pieces together, you are trying to weld 2 magnets together and ends are of opposite magnetic polarity--each piece has a magnetic north and south pole. Even if you cut it into pieces, each cut piece will still have a N & S pole. Wrapping the lead degasses the pipe. The degaussing only works while you are welding--while current is flowing thru the lead. Once you are done, you will find the magnetic field has returned. Sometimes, wrapping doesn't seem to work, and the fix is to unwrap the lead, and wrap it again in the opposite direction--it does make a difference. The more wraps you make, the better it works. Using AC instead of DC also makes it lots easier. Drill pipe and collars get magnetized by the rotation it experiences in the hole as it is turned within the earth's own magnetic field as well as when it is raised and lowered out of the hole--same with sucker rod. The tubing (just dropped down in the hole) becomes magnetized by that descent and from months and months of being down in strata that easily transmits the same Earth natural magnetic field to the tubing. [/QUOTE]
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