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gabriel.rodel
Active Contributor

Join Date: Jan 2009
Location: Philippines
Posts: 21

Purpose of Earth Lug in Piping

03/24/2010 5:55 AM

Guys,

Anybody knows the importance of installing earth lug in piping. In my current project, earth lug in ammonia lines was remove for some reason. Please help...Thanks..
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: PURPOSE OF EARTH LUG IN PIPING

03/24/2010 6:05 AM

Ask the individual that directed the lug to be removed to confirm the reason for doing so.

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Anonymous Poster
#2

Re: PURPOSE OF EARTH LUG IN PIPING

03/24/2010 6:38 AM

The earthing lug is mainly connected to peform 2 major and safety critical issues:

1- For underground piping it is used to connect portions of the piping to the remote cathoidc protection system ( avrage pipe voltage -750 to -1000 mV to ground for Carbon Steel)

2- While for the above ground piping it is used to discharge any electric static charge caused by liquid/gas movement inside the pipe.
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