ansi 9standards0 code issues - 4 150lb threaded flange

huangyhg

ansi 4" 150lb threaded flange
need to know how i can get the ansi  specs for this flange
just order the asme b16.5 book
call a vendor who sells forged steel pipe flanges.  the vendor can furnish you excerpts, dimensions, ratings, etc.
the title of asme b16.5 is pipe flanges and flanged fittings
nps 1/2 through nps 24 metric/inch standard.  this standard is about 230 pages.
let us know if you have a specific question about the 4-inch nominal pipe size class 150 flange. you may need to clarify your request too.  by threaded i am guessing that you speak of a reducing flange using a 4-inch flange that is threaded for a smaller size.  is this correct?
btw, consider discussing flange classes such as class 150 instead of 150 pound.  many people use 150# or 150 lb, left over from another era.  the asme b16.5 flange nomeclature changed from 150 lb to class 150 with the 1973 revision.
regards,
john
kingsa,
       suggest you post this in the asme code issues forum since the standard for flanges is asme b16.5.
amigo forista
se refiere a ansi spec a las dimensiones generales de dicha brida ?
jusmmerfield - it's funny that you mention that.  i was born in 1972 and i still most commonly hear them called 150 lb or 300 lb flanges ever since i entered the work force about 10 years ago.  it wasn't until a few years ago that i myself learned the true designations are now class 150/300.
as a stress guy, i shudder to think what someone wants to use a 4" threaded flange for.
edward l. klein
pipe stress engineer
houston, texas
"all the world is a spring"
all opinions expressed here are my own and not my company's.