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Flange Dimensions
- Thread starter MA123d
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- #3
< B16.5 does not cover the sizes below 2 inch >
Then why does the front page state "NPS 1/2 through NPS 24 metric/inch standard"
Granted, this is 1996 but I'd be surprised if they changed the range to 2" through 24" in the last few years.
Then why does the front page state "NPS 1/2 through NPS 24 metric/inch standard"
Granted, this is 1996 but I'd be surprised if they changed the range to 2" through 24" in the last few years.
U123d,
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.
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.
- Thread starter
- #6
ehsankeyvan
Mechanical
hi my friend yo can use asme b 16.5 for this material
What are you doing that you "want" something like 1/4" or 3/8" flanges?
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?
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?
I would think that needing flanges smaller than NPS 1/2 is getting into the instrumentation realm, and I'm afraid I'm not much help there. It's typical to use threaded fittings of various types for such small sizes, but I also know there are some industries where threaded fittings are frowned upon. Perhaps check out some subsea specs.
Hi U123d,
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
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
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