Pipe welding question?

[admweld]

The guy/contractor started this system up last week.Not one leak/problem with any of the 40+ connections i did so i,m pretty happy with myself.I have never done this big/type of a pipe job in my 15years operating but its good to know that i can handle this type of work should i ever get a call for this again.

[Sonora Iron]

Can’t ask for much more than that!

[Rig Hand]

The guy/contractor started this system up last week.Not one leak/problem with any of the 40+ connections i did so i,m pretty happy with myself.I have never done this big/type of a pipe job in my 15years operating but its good to know that i can handle this type of work should i ever get a call for this again.

Good deal.

Hope my project goes that good, had 6 mirror welds yesterday. I bet 5 of them leak.

Congratulations.

[Railmen]

Good deal.

had 6 mirror welds yesterday. I bet 5 of them leak.

Congratulations.

LOL that's funny

I can remember a welding job that i did way back when i was starting out, was welding on the ships that travel the Great Lakes.

so the foreman told me to put in a new 2" fuel line from the tank to engine room, i asked him if he wanted it welded or threaded all he said was he did not want any leaks.................... I said right, THREADED it is.

Railmen.

[Portable Welder]

Hi Adam, I to also do misc. pipe welding usually on gas from 3" to 6".

I like to run 6010 5P plus on the root, fill and cap with 7018 ex calibur.

I always power brush or grind between passes to insure no slag deposits.

I'm like you very confident in my welding since Ive been welding evrything under the sun for the last 24 years.

I also have a D1.1 cert.

Last year I had a stainless tig job that had about 130 joints and the contractor called me up to say that there were 2 leaks.
Both leaks were due to the poor casting of the elbows which were not near my welds. The stainless fitting came from the Philipines and I was not the purchaser.

[Wicked one]

"It may only have 4psi working pressure but if something goes wrong in the system the pressure could spike extremely high. I've welded a ton of pipe where they said it's only 2 or 4 psi but could spike as high as 2000psi."

A steam heating system, if well designed, should never go above 2PSI. The Empire State building is heated with 2PSI. That is why the piping is so large. Relief valves are set at 15 or 30 PSI. If a cast iron boiler spiked to 2000PSI, the boiler itself would explode! Not to mention the fact that most schedule 40 fittings are rated at only 150 PSI. If a low pressure steam heating system hits 5 PSI the system was designed wrong.

RonL

They probably ment that it has the potential to spike that high. The point is if you don't know what you are doing Don't do it! Not to mention the head pressure on a 2-4 psi 6" line is fairly high.