UCS-66
UCS-66
(OP)
The first, sorry but my english language is bad.
Hi, i need help.
My client say me that the vessel material (A-105 and A-106 Gr. B must have impact test.
I have two flanges W.N. DN 14" welded to a central tube DN 14" Sch. 20.
The design temperature is -40ºF/248ºF
The UCS-66 say me that i need impact test ?
Thank yu very much.
Hi, i need help.
My client say me that the vessel material (A-105 and A-106 Gr. B must have impact test.
I have two flanges W.N. DN 14" welded to a central tube DN 14" Sch. 20.
The design temperature is -40ºF/248ºF
The UCS-66 say me that i need impact test ?
Thank yu very much.





RE: UCS-66
You find the coincident ratio for B16.5 flanges as the ratio (flange rating at design temperature) / (flange rating at MDMT).
A similar procedure can be followed for the pipe. It will receive an MDMT rating as cold as -40° F for pressure up to about 540 psi.
RE: UCS-66
well, let's see. The 14" sch 20 gets basic rating per Curve B of -20° F. The coincident ratio is
= treqd(at MDMT) * E(star) / (min thk - corr)
= 0.218295 (reqd thk based 540 psi and S at ambient temp) * (1) / ((0.312 wall * 0.875) - (0 corr))
= 0.8
Fig UCS-66.1 gives about a 20° F reduction for coinc ratio = 0.8.
So, -20° F rating - (20° F reduction) = -40° F.
RE: UCS-66
Is neccesary the impact testing ?
RE: UCS-66
RE: UCS-66
I don't know more that this data.
The dimension is 14" and the thickness is sch.20.
The design temperature is -40ºF/248ºF
My single client says to me that the material must to fulfill with UCS-66.
Thanks friend.
RE: UCS-66