Black Iron Gas Lines

 
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Old 01-01-2011, 09:27 PM   #1
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Black Iron Gas Lines


this is a personal project and i know someone is going to say why aren't you in the diy forum but here it goes and the answer is i like hearing from the pros

how tight do you tighten black gas fittings to the pipe (tight as you can? hand tight and then 2 turns? hand tight and 1 turn?)

when working with rectorseal if you tighten a fitting and need to back it off a little to straighten it up is it like teflon one way only or is it ok to tighten and then untighten a little does the pipe thread sealant loose any seal or is it best to take the fitting off recoat the threads and put it back?
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Old 01-01-2011, 09:34 PM   #2
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Re: Black Iron Gas Lines


i tighten to feel....good luck

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Old 01-01-2011, 09:46 PM   #3
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Re: Black Iron Gas Lines


Tighten it to somewhere between doesn't leak and about to strip it out.
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Old 01-01-2011, 10:05 PM   #4
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Re: Black Iron Gas Lines


Too tight & you can crack fittings. You are going to pressure test aren't you?
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Old 01-01-2011, 11:10 PM   #5
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Re: Black Iron Gas Lines


yea i was thinkin somewhere around 10psi since gas is 2psi what u think?
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Old 01-01-2011, 11:12 PM   #6
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Re: Black Iron Gas Lines


haha i like that sawdaddy very specific
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Old 01-02-2011, 09:30 AM   #7
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Re: Black Iron Gas Lines


I hate to sound like commercial BUT the sealant is so important to me "In my opinion" Loctite is the best

Google them you will find them easily I use LOCTITE THREAD SEALANT 545 on most everything it's expensive but well worth it


But don't buy a case and keep it in the gang box or it will disappear LOL

Last edited by Joasis; 01-02-2011 at 12:29 PM. Reason: deleted content
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Old 01-02-2011, 09:42 AM   #8
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Re: Black Iron Gas Lines


Sorry to ask - but...

Do you have a Gas Ticket? Here in North Vancouver as homeowner I can wrong my own plumbing lines, low voltage wiring, framing, drywall, painting, electrical, and on and on... but Gas is a No Go.

I would make sure your allowed to do this work first.

And as my fitters like to say "No Bubbles. No Troubles."
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Old 01-02-2011, 10:04 AM   #9
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Re: Black Iron Gas Lines


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Originally Posted by bluebird5 View Post
yea i was thinkin somewhere around 10psi since gas is 2psi what u think?
Most residential systems are about 7" which equates to 1/4 psi. We pressurize to 25lbs.

It's your place and don't intend to judge. But, it would behoove you to pull a permit for the project. If for whatever reason, an incident were to arise, even if it were unrelated, your homeowners insurance will have a leg to decline responsibility.
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Old 01-02-2011, 10:08 AM   #10
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Re: Black Iron Gas Lines


If you use pipe dope and tape, you will be able to get away with going back. Tighten like a handshake, firm, but not over the top.
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Old 01-02-2011, 12:49 PM   #11
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Re: Black Iron Gas Lines


its around my area...gas co will tell you dope and tape.......plumbing vendor says dope no tape?? but i know who will red ticket me if i dont do it there way

we do dope/tape gas co calls for 3lb test...we do at least 10 pound

i tighthen snug tight but dont go nuts
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Old 01-02-2011, 04:23 PM   #12
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Re: Black Iron Gas Lines


A little off-topic, but doesnt anyone use lampwick anymore with dope?
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Old 01-02-2011, 07:51 PM   #13
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Re: Black Iron Gas Lines


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A little off-topic, but doesnt anyone use lampwick anymore with dope?
People do still use it on heating systems in the UK. I think it's a kind of hemp wick they use with the plumbers dope. You cant use it on drinking water pipes anymore though because of bacteria growth.
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Old 01-02-2011, 09:03 PM   #14
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Re: Black Iron Gas Lines


Tapered pipe threads on pipe and fittings need no sealant to be leak free if the pipe is threaded perfectly and the fitting threads are also perfect.
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Old 01-04-2011, 07:17 AM   #15
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Re: Black Iron Gas Lines


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Originally Posted by KillerToiletSpider View Post
Tapered pipe threads on pipe and fittings need no sealant to be leak free if the pipe is threaded perfectly and the fitting threads are also perfect.
I can't say I've ever heard this before. NPTF Dryseal are the only ones I know of that donít actually require sealant, but even then, itís still often used for added leak prevention and to prevent galling. As far I know, regular NPT threads always require a sealant. Here, our plumbing and gas code require it. Most will even use both tape and dope on threads for LP and natural gas piping.
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Old 01-04-2011, 05:19 PM   #16
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Re: Black Iron Gas Lines


Quote:
Originally Posted by DuMass View Post
I can't say I've ever heard this before. NPTF Dryseal are the only ones I know of that donít actually require sealant, but even then, itís still often used for added leak prevention and to prevent galling. As far I know, regular NPT threads always require a sealant. Here, our plumbing and gas code require it. Most will even use both tape and dope on threads for LP and natural gas piping.
I think he means in theory.
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Old 01-04-2011, 06:11 PM   #17
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Re: Black Iron Gas Lines


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I think he means in theory.
Inner this is of subject but is it ok to run low voltage lines like Ethernet and phone next to mains power or is it best to run them apart? I'm being told 2 different things by 2 different sparks and I thought you would be the guy who knew.
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Old 01-04-2011, 08:24 PM   #18
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Re: Black Iron Gas Lines


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Inner this is of subject but is it ok to run low voltage lines like Ethernet and phone next to mains power or is it best to run them apart?
I'm not Inner, but I'll answer anyway. Asked in the right place, you'd have had your answer much sooner.

The answer is no. Not only against code, but with the lines up against each other like that, there can be inductive coupling that will induce 60 cycle hum into the the signaling lines. Not good.
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Old 01-04-2011, 08:47 PM   #19
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Re: Black Iron Gas Lines


Thanks Tin. Thought as much but wanted to be sure. One guy is using the easy way out trying to run them in the existing runs. Gonna get either run to run new runs for the low voltage stuff now.
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Old 01-04-2011, 10:11 PM   #20
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Re: Black Iron Gas Lines


Quote:
Inner this is of subject but is it ok to run low voltage lines like Ethernet and phone next to mains power or is it best to run them apart? I'm being told 2 different things by 2 different sparks and I thought you would be the guy who knew.
There is no code restriction in my area regarding that. In many circumstances it cannot be avoided. Tin is correct in that inductance problems occur if they are ran together especially for long distances. Avoid running network lines near transformers, fluorescent light fixtures and power wires in general.

If you have to run them together in a tight spot, fan them out after.

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