ASME B31.3 table 304.1.1 Y for Low Aolloy

[Metma]

dear all,
with reference to ASME B31.3 Table 304.1.1 Values of Coefficient Y Low Alloy Material Like A335-P11 or A691 1.25Cr or A234-WP11 which is the group to take as reference for thickness calculation ? "Ferritic Steel" or "Other ductile metals" ?
thank for your supports
regards

 

[GBTorpenhow]

Chrome-moly steel (Gr 11/P11/WP11) is ferritic.

ASTM A335 "Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service"

 

[XL83NL]

I once did this assessment for all materials in B31.3 table A. From my notes I found the following regarding this determination;

determination of category done using information from B31.3 appendix A (see footnotes to each table) and B31.1 table 104.2.1(A).

Huub
- You never get what you expect, you only get what you inspect.