ASME B16.5, 1974 or earlier 1

[JPGriffin]

I am attempting to rate a piping system that was designed to B16.5 1974 and uses A181-1 flanges. A181-1 is no longer used (replaced with A105. Current edition of B16.5 does not include data on A181-1. I need a copy of the 1974 or earlier edition to determine allowable pressure for 300# A181-1 flanges. Can anyone help?

 

[jte]

(cross posted to the ASME Code issues forum)

JPGriffin-

In the 1965 edition, many materials, CS through 9Cr were lumped together up to 650°F for their flange ratings. For 300# flanges, the ratings ranged between 720 psi at 100°F to 515 psi at 650°F and on to 85 psi at 1000°F.

In my 1977 edition, A181-1 material is placed into material group 1.4 which ranges from 620 psi at 100°F 450 psi at 650°F and on up to 50 psi at 1000°F.

Let me know what your temperature range is and I can fill in the blanks.

jt

 

[JPGriffin]

I need to know the allowable pressure shown in the 1977 edition of B16.5 for A181-1 flanges at a temperature of 200F.

 

[jte]

JPGriffin-

The 1977 edition of B16.5 gives CL-300 A181-1 flanges a pressure rating of 560 psi at 200°F. Identical flanges installed under the 1965 edition would have a rating of 700 psi at 200°F.

jt