Flange Rating for SS316 and SS316L
Flange Rating for SS316 and SS316L
(OP)
For coded vessel can i use SA-182 F316 for design calculation and SA-182 F316L for other documentation.
does code restrict from doing as mentioned above, please provide refference
does code restrict from doing as mentioned above, please provide refference





RE: Flange Rating for SS316 and SS316L
If a material is marked with specifications, grades, classes, or types, it may be used with the allowable stresses, design stress intensities, or ratings appropriate for any of the markings on the material, as long as the material specification, grade, class, and type is permitted by the code of construction governing the boiler, vessel, or component in which the material is to be used. However, once the designer has selected which marking applies (specification, grade, class, type, etc.), the designer must use all the design values appropriate for that selection and may not mix and match values from any other specifications, grades, classes, types, etc., with which the material may be marked.
This paragraph is copied in ASME IIA Appendix III, paragraph III-240.
In short, you have to choose one, and be consistent throughout your calculations/drawings/etc... No mixing and matching.
RE: Flange Rating for SS316 and SS316L
If you have 304L that is NOT dual certified as 304, it likely has lower yield strength than the 304, and shouldn't be interchanged on that account, among others.
RE: Flange Rating for SS316 and SS316L
RE: Flange Rating for SS316 and SS316L
-Christine
RE: Flange Rating for SS316 and SS316L
https://cstools.asme.org/Interpretation/Interpreta...
RE: Flange Rating for SS316 and SS316L
RE: Flange Rating for SS316 and SS316L
The B16.5 2.9 states “Material for flanges and flanged fittings may meet the requirements of more than one specification or the requirements of more than one grade of a specification listed in Table 1A. In either case, the pressure-temperature ratings for any of these specifications or grades may be used provided the material is marked in accordance with para. 4.2.8.”
Keep in mind that 316 has the note that: 'At temperatures over 1,000F, use only when the carbon content is 0.04% or higher, where 316L does not have this requirement.