Coil Rolling direction vs shell

[ElCidCampeador]

Hello,

my client wants to use a coil plate 304L Thk.8mm to realize the shell of a pressure vessel (pipe not allowed). According to ASME VIII Div.1, may I cut shell height from coil not respecting the direction of rolling (e.g height of shell parallel to lenght of coil)?

People always advised me that it's better to respect direction of rolling, but I don't understand if it's only for "good practice" or there's history behind (any reference?).

What kind of difficulties may I experience?

FYI, some design data: O.D.=500mm, Lenght=1830mm, MDMT 0°C, DP=20 bar, DT=150°C, Fluid=tertiary amine

Thanks

 

[Dhurjati Sen]

Rolling leads to anisotropy, i.e. directional properties. More strength, etc. in the direction of rolling and not in a direction perpendicular to it.



DHURJATI SEN

 

[ElCidCampeador]

Yes, it's what I thought, now I ask:

1) Has this idea being converted into a mandatory/suggestion point by ASME?
2) Is there any article/book which analyze this problem?

 

[EdStainless]

Some metals have more directional texture than others. The austenitic SS alloys show very little of this, Ti alloys show a huge amount. In can be mostly a variation in strength, toughness, fatigue, or even modulus so be aware.
The design properties in the code take this into account.

Aerospace usually requires fixed orientations for parts, which means that you can't cut bar from plate.

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P.E. Metallurgy, consulting work welcomed