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Why use NEMA G10 Insulation kits?

Why use NEMA G10 Insulation kits?

Why use NEMA G10 Insulation kits?

(OP)
Hi,

What is the reason to use NEMA G10 gaskets for pipe insulation? They are quite common in the water industry, especially at larger sizes, however I can't see why they need to be used?

Their dielectric strength is high (530 V/mil) however I doubt a pipe has 66,250V go through it (530V * 125mil, 1/8"=125mil). It seems even basic red rubber gaskets at 280V/mil provide more than enough electrical insulation.

Please if anyone can provide feedback I would really appreciate it.    

RE: Why use NEMA G10 Insulation kits?

after you put 20,000 lbs compression on that 1/8th inch, what thickness have you got left, not to mention what it would be with red rubber.

RE: Why use NEMA G10 Insulation kits?

If I'm not mistaken, it is not uncommon for lightening to travel for some distance through the ground, especially if it manages to travel along a pipeline. Given that the maximum voltage by several estimates is somewhere between 10MV and 100MV with an average current of 30 kA and power output in the vicinity of 1 terrawatt, I think it might be prudent to provide something better than rubber for the gaskets.

RE: Why use NEMA G10 Insulation kits?

(OP)
In the case of lightning numbers you cited, wouldn't the G10 material even be inadequate?

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