What procedures are required prior to making a welded connection to a 1" oil pipe other than draining the system to prevent an accident.
No cause to weld pipes that small. If you got a fuel line or oil line running less than 3,500 PSI you can use hydraulic line. 1" line is too small to weld any how.
If you think you have a crack in a gas line, here is what you have to do.
1. Run the pig down the line to find any cracks, dips, hills, or rust holes. The pig has an ultrasound rig on it and can spot external cracks or rust. If you find a thin spot, then you got a hassle.
2. When you find a rust thinout or hole, shut down the line, run a wad under dry CO2 all the way through the line, and leave the CO2 at one atmosphere. The balloon at the end of the line has to be flat: if it pulls in, you got vacuum, if it bulges, you got pressure. Get the pressure neutral.
3. If you got an inside rustout, the next pig you send down has a welder on it and will push wire that is just a little softer than the pipe into the hole at about 125 amps. Some pipes get real hard after a while. That means they get brittle and bust.
4. If you got an external rust out, you still gotta fill the line with CO2 but then you gotta dig to the line that might be down 20'. The excavator operator has to be trained for it: you can't ask just any operator to dig pipes or buried power lines.
5. Once you dig to within a foot of the pipe, you have to lower a dirt cage into the hole and put down laborers with pull-out gear and SCBA gear. They gotta dig by hand and sample the soil to see if any fuel leaked out of the line. If so, you got more digging ahead of you.
6. Once you got the hole dug, and the pipe clean enough to weld, then you have to send in a pipe welder to fix the crack and he has to be in pull-out gear too.
7. That weld has to be inspected. If it didn't take, EPA will condemn the whole job, you gotta send in a crew to cut out a piece from the line, weld that in place, and then inspect it again.
8. Once it passes inspection, you gotta fill the hole with clean coarse sand, use vibrators to compact it every two feet, and once pipe is covered a foot and a half then you ca back fill the hole. Put a tent over the hole for one last test, and then putge out the CO2 with a neoprene balloon, with natural gas pushing the balloon.
9. Then you can re-fill the line with whatever fuel was in it and put it back to work.
I saw jobs that had pipe lines down 3 and 4 days. Usually we get the pipeline back up in 2-3 hours though.
Rocmike you forgot to use the word Atheist.
Good move Harley. That is on schedule for pipes over 8" and run at less than 3,500 PSIG. Any petroleum, powdered-coal, or coal slurry line has to run at 3,500 PSIG line average unless it is a regulated trunk line.
Coal powder has to be 250 grit or finer and use CO2 as a pressure gas. It needs trap tanks every 40 miles of the line FYI. We use an 8" line from the coal refinery to the powerplant here. It is enough to keep the boilers working and it isn't subject to sabotage the way coal trains are.
Pressure on powder coal lines gets to ba a major hassle. Toward hilltops we get as little as 1,750 PSIG and at the bottoms of hills we can get as much as 7,000 PSIG.
Welding a 1" pipe is not the best move.
On Rocmike alias responding to another. How sad.
Looks like Tadpole ain't certified for ANY welding process. Leftists are just not qualified to talk at all.
Rocmike aka Harley Spirit, is this the end of yesterday's posting marathon or the beginning of today's posting marathon? It is so hard to tell when you posts hours upon hours day after day alias after alias repeating the same thing over and over. GET A LIFE.
HS, Tadpole is not even a high school grad. She sure ain't WABO certified and she sure don't hold a CDL. All she knows is how tyo molest little children and worship at the idol of Obatso. What a pity all leftists are that ignorant and bitter.
Maybe if they got the training you and I got leftists would be a lot smarter.
Rick, looks like you run a good bead too. What a WABO welder sticks together ain't coming apart.