Table R-1 API 620 Materials,

[Chavita]

Dear Engineers:

You gotta help me with this thing.

We are rebuilding the strcuture for an API 620 roof tank.
Since, the temperature is -50°C, the materials of the structural members shall be according to Table R-1 of the API 620.

Here in Mexico there are not beams or shapes in those materials. So, we are trying to find a vendor within the USA, but we haven´t.

Does anyone of you know a Vendor of this beams?

Any hint, suggestion, clue, book, web page will be higly appreciated and helpful.

thanks in advance.

Chavita.

PS. I attached table R-1