7 inch 90 degree elbow

[mechbadem]

I have problem with finding the 7 inch elbow, it must be seamless. could you please name a local vendor in your country or could you please give me some advice for manufacturing it properly.

Thanks

 

[Latexman]

A devilish thought crossed my mind. Do you think someone in the depths of the responsible company or engineering firm is sending someone else on a "snipe hunt"?

Good luck,
Latexman

Technically, the glass is always full - 1/2 air and 1/2 water.

 

[Gator]

Latexman, maybe the bucket of steam couldn't be found so they moved on to this.

Piping Design Central

 

[DekDee]

mechbadem,
Go on google and try "193.7 mm outside diameter pipe"
I found quite a few examples of 193.7 mm OD x 5.6 mm WT pipe (IS 3589-1991 & EN 10297-1)
Didn't bother looking for elbows as I thought you could follow that up,
Cheers,
DD

 

[europipe]

din 2605 / 2606

 

[LittleInch]

Just goes to show you need to type in the right question...

This is an example of what you get after typing "193.7 mm elbow" .

http://www.gvzglasshouses.co.uk/pro...ws/flypage/8960-w-elbow-1937-x-56-mm?sef=hcfp

Remember if you buy a 90 or 45, you should be able to cut it back to a 30 degree without a big problem with a grinder.

Still never seen one in petro chem plants, but maybe in other industries it is a bit more common.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[Gator]

There's no material specified for that elbow (other than "steel") and I'm wondering why such an odd-size fitting was created when standard sizes exist.

I seem to recall seeing a 5" connection once on a European-sourced compressor and of course metric DIN and JIS sizes, but like LittleInch, never 7" in petrochem, cryo, pulp and paper or chem.

Maybe the greenhouse industry is somehow special and they need oddball pipe sizes...


Piping Design Central

 

[europipe]

gator, in the old days dn175 (din) was standard just like dn125, dn150 etc.

 

[Gator]

Thanks europipe, not enough eurexperience I guess.

Piping Design Central

 

[racookpe1978]

OK.

So, it is a single 30 degree bend. That's easy.

Machine from round stock the "193.7 mm elbow" by machining the OD to 193.7 mm at least 1.2 meter long, then machine the ID as required for the wall thickness actually needed using the OD to maintain alignment in the lathe.

Put in a simple pipe roll bender (3-roller type) and roll the center of the 1.2 meter long "pipe" to 30 degrees bend.

Cut off excess straight stock on both ends. Weld prep the ends by hand.

 

[DekDee]

Try this

http://www.tenaris.com/shared/documents/files/CB433.pdf

Cheers,
DD