Flange Dimensions
Flange Dimensions
(OP)
thread174-71043: 2 inch 900 / 1500 flanges
Please suggest the standard for flange dimensions for valves below 2 inch.
Please suggest the standard for flange dimensions for valves below 2 inch.
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RE: Flange Dimensions
RE: Flange Dimensions
B16.5 does not cover the sizes below 2 inch.
RE: Flange Dimensions
Then why does the front page state "NPS 1/2 through NPS 24 metric/inch standard"
http://www.ewp.rpi.edu/hartford/users/papers/engr/...
Granted, this is 1996 but I'd be surprised if they changed the range to 2" through 24" in the last few years.
RE: Flange Dimensions
Where in the world did you learn that B16.5 does not cover sizes below 2 inch? In fact, the 2013 version covers sizes of NPS 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 3 1/2, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, and 24.
The previous thread you linked deals with a completely separate issue, which is that in certain sizes, flange dimensions for some pressure classes are identical to other pressure classes:
- 400 Class flanges are dimensionally the same as 600 Class flanges in sizes NPS 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, and 3 1/2 (so when you look up dimensions for these 400 Class flanges, the table directs you to use dimensions for 600 Class flanges).
- 900 Class flanges are dimensionally the same as 1500 Class flanges in sizes NPS 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, and 2 1/2.
That previous thread specifically dealt with NPS 2 900/1500 Class flanges, but there is nothing that says B16.5 doesn't cover flanges smaller than NPS 2.
RE: Flange Dimensions
Have have put up the wrong question.
I need to know the flanges below 1/2 inch.
Extremely sorry for my mistake.
RE: Flange Dimensions
RE: Flange Dimensions
At some point, and 1/2" sounds like it's that point, the size of the flange and necessary bolts for really small piping just doesn't make sense. Can you just use 1/2" piping if you are determined to use flanges?
RE: Flange Dimensions
RE: Flange Dimensions
Since ASME B16 starts from NPS 1/2", what you can do is trying to assemble your valve with a set of instrumentation fittings and a flange adapter-to-fitting. There are good options, like Swagelok, which has a lot of options in this way. If this idea can be acceptable, so you can range from 1/16" to 2".
Hope it can help you.
Best regards