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I'm sure that this is an easy question for most, but I am wondering how an internal spline is cut. For that matter, how is an external spline cut.

I was once told by someone that I now feel lacks much credibility that when you are welding on a pipe that has any oil in it, that when yoou attempt to weld up the crack that any oil in the pipe will be drawn too and will contaminate the weld. this is wrong, isn't it? Won't the oil actually be...

I have been having problems with the mechanical seals on B.J. deepwell pumps leaking, often within only a few hours following their installation. The fluid being pumped is black oil, (ie. VGO, cutter stock, bunker fuels, waxes etc.) The seals we are using currently using are BW seals having...