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What if you cut your pipe in 22 1/2 degree sections and had a three piece 90? You would have less pressure drop, and still maintain your angle.

Hi all, I have been working on a Combined heat and Power unit that uses a CAT engine, heat recovery equipment, pumps ,etc., I have to move about 17,000 CFM through this unit and I'm at the point that I need to fit the filters and the attenuator inside the "box" that all these parts are in...

Is that one better than the Hobart book?

That wire welds great in the uphill potsition, and I use the 1001-1002 count to weave it. it will look like or should look like a rattlesnake tail when the flux falls off.

I'm not understanding why this needs to be done. Why not use 321SS if this is for acid the 316 won't hold out as long without pitting.

There could be a number of reasons that a crack formed, Bad mix in the gas, not using the correct tungsten, welding in the outdoors instead of controled environment, also thickness of the material. Was there a mixed gas used or pure? I've had a bad mix of Ar/He once that cost me three days of...

I've been a welder for 20 years and I've welded a lot of structures. Some with zero gaps and some with gaps big enough to stick your finger in. In my experience it is really the quality of the welder, and the type of weld your'e gonna do on the structure. You mention that you've done some MIG...

Thanks again for the help.

Thanks for the advice. It seems I'm way out of my league here, but I'm still really interested in trying to learn this stuff. I'm starting school for Unigrahics next month. Is there a site or maybe a book that I could read to help with the tech, or is it really better to get into some kind of...

Well this is an interesting and very relieving site to find. I'm not really sure this is the part of this forum I'm suppost to be in but my job is mostly mechanical, a lot of stucture and way too much math. My company designs CHP units, and they hired me because I have 20 years feild experience...