Type H flange and Type S Flange 1

[heals88]

Anyone know what type "H" and type "S" flanges are? I found them on an old hand drawing of a PV. I haven't had any luck searching online. is it old school terminology?

 

[SnTMan]

heals88, first, welcome to E-T. Second, are they body flanges? Can you post a pic? Old school? Most likely, and possibly terminology particular to the fabricator.

Regards,

Mike


The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[r6155]

May be structural shape H or S. See AISC

Regards

 

[Geoff13]

If memory serves these were names used by FVC (Forged Vessel Connections). They would look like LWN, but with even thicker necks. Can't lay my hands on an old catalog.

Type "H" would have a heavier neck (for instance the neck OD is the nut stop) and Type "S" I seem to remember meant special. There were a half dozen standard neck OD's (Type H, V1, V2, ...) but if you needed something unique then it was Type S.

Haven't managed to Google anything matching my memory, but does this make any sense with your vessel? I'd expect a vessel with a decent thickness (say 1" or 25 mm and greater) and no reinforcing pads even on the large diameter nozzles.

 

[Geoff13]

Here's a competitor who uses "similar" nomenclature. Link

They use HB for what I was remembering as H. They use I1, I2 and I3 in place of FVC's use of V1, V2 and V3. And finally they use E in place of FVC's use of F.

 

[heals88]

Thanks Geoff, that makes sense. I had a feeling H was for HB and S looked like en equal barrel but i couldn't figure out what the S stood for...