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xray can. we did a steam line corrosion survey on a section while the line was in service and coved in insulation. we used a crawler by VJ Technologies that they were demonstrating.

to the OP, for future reference.... when in doubt, follow the code. Section VII, C2.270. check with your local AI to determine whether he has to witness the test and sign off on any documents pertaining to the hydro. it's a good idea to remove any fixtures that may be damaged by the hydro...

the question is in regards to spark plugs in high compression engines. my friend and i were discusssing a company that claims that a higher voltage will cause the spark to 'jump the gap faster' than a normal, already sufficient, voltage that is used. my thoughts were that whether the applied...

fellas, this is going to sound lame, but is the correct term spark kernel or flame kernel. i thought SAE refered to it as flame, but someone has told me otherwise. thanks

PD=potential diff, my bad. that's what i tought. if the voltage is sufficient to ionize the medium, the velocity of the arc will be the constant, as the medium ionization potential is fixed?? thanks for the reply! anyone else?

gents, i have been debating a question with a collegue. he figures that a higher PD across 2 conductors of the same material, a set gap with a uniform medium will arc at a faster velocity than the same set-up with a lower PD. both PD's are more than capable of arcing the prescribed distance. my...