ANSI B16.1 RFWN??? Very confused
ANSI B16.1 RFWN??? Very confused
(OP)
I spec'ed and ordered an ASME B16.47 Series A 36" 150# RFWN flange, and received what appears to be an ANSI B16.1.
I cannot confirm this as I am unable to find the dimension chart I found on Friday for a B16.1 36" 150# RFWN. I am almost sure I found this chart, but now all I can find is a chart for a B16.1 36" 125# RFWN flange, or 150# class flanges under 24" nom.
The problem is that this flange is welded as a body flange in a vessel, and in attempting to locate nozzles, we discovered that the flange is built to the incorrect standard. We now need to re-run the calcs to see if we need to cut this flange off and replace it with the correct one.
The stamp on the flange simply says 'B16', and then has the other required data in some order (size, A-105, etc.)
To summarize, I suppose I'm a bit confused about this standard. Can someone give me some info on the B16.1 flanges? I.E. Dimensions, available classes, and anything else you know about them?
I cannot confirm this as I am unable to find the dimension chart I found on Friday for a B16.1 36" 150# RFWN. I am almost sure I found this chart, but now all I can find is a chart for a B16.1 36" 125# RFWN flange, or 150# class flanges under 24" nom.
The problem is that this flange is welded as a body flange in a vessel, and in attempting to locate nozzles, we discovered that the flange is built to the incorrect standard. We now need to re-run the calcs to see if we need to cut this flange off and replace it with the correct one.
The stamp on the flange simply says 'B16', and then has the other required data in some order (size, A-105, etc.)
To summarize, I suppose I'm a bit confused about this standard. Can someone give me some info on the B16.1 flanges? I.E. Dimensions, available classes, and anything else you know about them?
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RE: ANSI B16.1 RFWN??? Very confused
B16.1 covers Classes 25, 125, and 250 Cast Iron(ASTM A 126) flanges and flanged fittings.
RE: ANSI B16.1 RFWN??? Very confused
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RE: ANSI B16.1 RFWN??? Very confused
Yes it is active, latest release is 2005.
RE: ANSI B16.1 RFWN??? Very confused
Go to www.boltex.com to see dimensional specs.
RE: ANSI B16.1 RFWN??? Very confused
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RE: ANSI B16.1 RFWN??? Very confused
RE: ANSI B16.1 RFWN??? Very confused
http://www.texasflange.com/Catalog.pdf P.28, col. C
http://www.texasflange.com/Catalog.pdf P.15, col. C
The difference is 1.185".
The 'certification of inspection and test' tells me it's ANSI 16.1. I guess I left that part out. Sorry guys.
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RE: ANSI B16.1 RFWN??? Very confused
ht
RE: ANSI B16.1 RFWN??? Very confused
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RE: ANSI B16.1 RFWN??? Very confused
www.steel-flange.com, there is a list of links to the ANSI dimensions.
RE: ANSI B16.1 RFWN??? Very confused
If it is in fact/instead steel, and not B16.1, I am not familiar enough with all specifications and codes to answer a followup question of whether such a generic or blanket marking scheme, if that is the case, satisfies the specific marking standards of all codes etc.
RE: ANSI B16.1 RFWN??? Very confused
aside, the flange IS indeed A-105/SA-105, and not cast iron. it is built to the ANSI B16.1 dimensions, but definitely forged and stamped with a 150# rating.
very curious mess, indeed. the vendor has been notified, and is supposedly trying to figure what and how it happened. meanwhile, that portion of the vessel is waiting for a resolution...
tick tock tick tock....
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RE: ANSI B16.1 RFWN??? Very confused
http://www.pacificflange.com/catalog.html
RE: ANSI B16.1 RFWN??? Very confused
I'm still looking for answers...does anyone think it possible that the markings required by this standard are different from the actual flange rating to keep consistent with other standards? In other words, the flange is rated 125# by the ANSI B16.1 code, to which this flange conforms dimensionally, but it may be marked 150# as this rating is more common?
Or...another scenario...could the flange be built dimensionally to the ANSI B16.1 standard, but built from forged steel per ANSI A-105, and thus the class rating increased to 150#? That sounds to me like they'd be stepping into a different standard altogether with the material change, but I could be wrong.
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RE: ANSI B16.1 RFWN??? Very confused
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