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True SA-53 may be welded, but if also certified to SA-106 it must be seamless.

Be careful of the year of the ASTM Specification as Ed said. To use ASTM material, it must be acceptable to ASME. See ASME Section IIA Mandatory Appendix II for what years are acceptable. For example, if you purchase ASTM material that is newly wrought it may be certified to the 2019 or 2020...

What Code are you design/manufacturing to?

Thank you all.

Ed Google was of little help. 49 CFR 173.315 didn't help either.

I am not a chemist so I ask for your help. We have a customer asking for transport vessels to haul Monomethylamine 50% aqueous solution. Is it corrosive to steel (ASME/ASTM SA-517)? Is SA-240-304 or 316 a better or necessary option?

I have used a lot of SA-455 making heads as well as SA-414G which is a similar sheet spec. I doubt you will find SA-455 at a steel warehouse. Most likely a mill buy.

Being P11 material I assume this is QT material. If you hot form you will need to re-quench and temper the formed parts. Heating formed parts to the austenizing temperature will likely result in distortion.

My bad. I missed that this is Div. 2.

If this is a hemispherical head the FE=5.6%. If it is any other shaped head it is greater. Stress relieving is required for the fiber elongation per UG-79, UHT-79. PWHT is required per UHT-56.

Section VIII is for new construction, not in service inspections unles referenced by the NBIC, so UG-46 applies to new construction.

To which Code are you inquiring? Nozzle size? Shell/head thickness?

Marty, Was it Q&T material? Was it hot formed? Was it re-Q&T'd after forming? Were mechanicals run on specimens heated with the part(s)?

There are very few head manufacturers that can make a head this size, this thick from a welded blank. Those that can will most likely need to do it hot (heating above the lower critical and tempering temperature). Welding and forming the round center section can be done as if forming any SE...

See the DOT requirements. 49 CFR 178.318 etc. https://www.ecfr.gov/cgi-bin/text-idx?SID=06dc33a334a4ca758900336bbdf92738&mc=true&tpl=/ecfrbrowse/Title49/49cfr178_main_02.tpl

One caveat, The general specifications covering the materials may have additional limitations. For example SA-20 for CS materials and SA-480 for SS materials.

Ed, My copy of SA-240 shows a maximum N content of 0.10 for 316 or 316L. 316LN shows a range of 0.10 - 0.16.

SA-516-70 heads are routinely formed hot and cold. Hot formed heads require testing the mechanical properties on the same heat/slab coupons to verify the material meets specification. How was the original head formed? What temperature did you heat it to, to modify the diameter? If you...

david339933see Figure UCS-66 Notes 2(a) and 3(b). There appears to be a conflict.

What about normalized A105? Which curve does it belong on? See attached. https://files.engineering.com/getfile.aspx?folder=fc2a7529-ed6c-4c58-8b08-52ca501a49f9&file=UCS-66_curve_B_&_C.JPG