Thursday, March 3, 2011

CrazyEngineers Forum - Chemical & Metallurgy Engineering

CrazyEngineers Forum - Chemical & Metallurgy Engineering

Heat Exchanger Fabrication Question?

Posted: 03 Mar 2011 09:34 AM PST

In a dilemma about exactly how tubes are stuffed in a multi baffle plate heat exchanger. The half plate baffles are already stitch welded on inside of exchanger pipe.

With only a 1/64" clearance in holes for tubes I cannot fathom how one would insert a 35 ft tube thru the full length of a pipe with half baffle plates every 8 ft..

It seems like you would need a broom handle type wood stick aligned thru full length of pipe thru each baffle and then use it as a guide for the tube.

I don't know, have you had any experience around heat exchanger fabrication?

Appreciate your comments and advice,
Kelly

Rockwell B hardness testing

Posted: 03 Mar 2011 01:21 AM PST

Good morning everyone!
I wasn't entirely sure where to post this, but this forum seemed the most appropriate.
I need to do some hardness testing to Rockwell B (idiotic customer requirement on an old part, normally it's Brinell). I've got calibrated and serviced Rockwell testing equipment, but I haven't got a Rockwell B hardness calibration block. Can I use a Brinell one, or should I get a Rockwell B one? It's just a block of a known hardness value, so do you think I can use it for this?
Thank you for your help.
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