B) Could you elaborate why you wouldnt use it, and why would it be your first choice?
About that I also have a question on the standard that might be related, the copy I have says "slip on welding(NPS 1/2 to 2 1/2 only)" (right below the drawing on page 90)
But then they go ahead and give dimensions for them on all sizes, so its contradicting or I misunderstand.
rmerlob, the note would appear to apply to socket-weld flanges only (my older copy says to 3 NPS).
For a slip-on flange the welds will be two fillet welds (corner joints) and they would probably be rather large. The stress concentrations are not especially desirable. They are hard to NDE. I would more likely use a weld-neck flange and butt weld it. This weld can be x-rayed.
rmerlob, 1) As I said, my copy is older. Interesting, I'd like to get a look at a current one.
2) Yeah, I'd say you read it right. Material, temperature, read off a pressure.
Your attached dwg says B16.5-2003. Note that the latest edition of B16.5 is 2013.
Depending on your contract date, you'll probably have to stick to B16.5-2009.
The material specified on your drawing is ASTM A516 Gr. 65. This is a plate material.
Plate material is only allowed for blind flanges and reducing flanges without hubs. Please read the following sections in ASME B16.5:
Paragraph 1.1(b)
Note (b) in Table 1A
Paragraph 5.1