26" ASME B16.47 Flange

[kander]

Can anyone tell me what is the difference between B16.5 & B16.47? Is there a dimensional change.

Also, does anyone know where I can find a listing of large ASME flanges (>24") ?

 

[pipingdesigner]

Kander,

Try

http://www.welding-units.co.uk/dld/dld.htm

They have free flange data software.

pipingdesigner

http://www.pipingdesigners.com

 

[ApC2Kp]

The B16.5 standard applies to sizes up to NPS-24, while the B16.47 standard has dimensions for sizes NPS-26 and larger.
The B16.47 standard has two series, 'A' and 'B', which incorporate the MSS SP-44 dimensions (series'A'), and the the API-605 dimensions (series'B'). They are not interchangeable! The weight of series'B' flange could be less than half the weight of series'A'. The MSS SP-44 (series'A') bolt circles are compatible to the B16.1 bolting patterns for cast iron flanges. The API-605 (series'B') bolting patterns have smaller bolts, smaller bolt circles with more bolts. Few if any valves are made with series'B' flange patterns.
see supplier / distributor website for flange dimension data

http://www.tiogapipe.com

http://www.texasflange.com

http://www.mcjunkin.com

Many offshore flange manufacturers also include dimensional data.

 

[NozzleTwister]

There is one exception to ApC2Kp's post.

22" NPS is not covered by B16.5, for this size use MSS-SP-44.

NozzleTwister
Houston, Texas

 

[kander]

Thanks guys. That answers my questions.