Is a dielectric union what I need for a magnetic field on a gas pipe?

I have a furnace in the bedroom that runs on propane.  The pipe runs from a propane tank outdoors through the ground and up through the floor of the bedroom.  I am getting no reading on the electric scale of my trifield meter.  But I'm getting an extremely high reading on the magnetic scale.  I've been looking at dielectric unions at the suggestion of someone here.  I'm wondering if this is really what I need since I don't get any electrical reading but a magnetic one.  What could cause a magnetic field to be coming off the metal pipe coming from the propane tank?  Can someone explain this to me?  Also, would I need to wrap some mu metal around the pipe in order to stop this?  Would a dielectric union prevent the field from going further up the pipe if I put one on the pipe somewhere?  Thanks for any insight.

Magnetic field around the pipe means current running through
the pipe (or could mean external magnetic field attracted to steel
pipe, but in that case the field is mostly at the ends of the pipe).

If the tank is grounded then there is a current path from the
neutral of your electric to your ground wires to your appliances
back through the pipe to the tank to ground.   Dielectric union
solves that.  A normal gas meter has a dielectric union usually.

On Sat, Jul 30, 2011 at 8:05 PM, fantasticsam131 <
[hidden email]> wrote:


[Non-text portions of this message have been removed]



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I grounded the tank recently to a ground rod since I was achoring the tank with metal cables into cement.  They told us to do that in case we got flooded by the Missouri river.  They float.  I noticed it felt different after I grounded it.  I'm getting a 15 reading on my trifield on the magnetic scale.  I did not put a dielectric union on it since I don't know how to solder.  The pipe from the tank is copper and it connects to a galvanized pipe near the house.  After reading a site which home inspectors talk to each other on I connected a shark bite fitting between the copper pipe and the galvanized pipe since they said the shark bite is nearly the same as a dielectric union and doesn't pass the current.  Still no change.  Still got a 15 reading.  I also put a torrid which fits snugly over a 3.4 to 1/2 inch reducer to the pipe that goes under the bedrrom and up through the floor to the wall furnace.  It feels different in the room.  Everything feels a lot more peaceful in mymind.  You know, real quiet inside my head which is really good.  But the magnetic field remains.  I've been working on that room this weekend.  My fuse box is in that room on an opposite wall.  I've put up more mu metal on the fuse box and also more steel on the wall on top of the mu metal.  I read that even aluminum if you put enough of it on the wall so that it is thick will reduce a magnetic field.  It does reduce it somewhat.  I may have to hire someone to put in a dielectric union to see if that makes any difference.
--- In [hidden email], Bill Bruno <wbruno@...> wrote:

I undid the cable that was wrapped around one leg of the propane tank and was connected to the grounding rod.  It brought the reading down to about 4 on the end of the pipe whee it connects to my furnace.  Under the house I was getting a reading of 25 before i undid the cable.  If I have someone come out and put on that dielectric union do you suppose it will drop the reading down even farther?


--- In [hidden email], Bill Bruno <wbruno@...> wrote: