MATERIAL SA36
MATERIAL SA36
(OP)
IS IT POSSIBLE TO MANUFACTURE AN ENTIRE VESSEL (SHELL AND HEADS)ACCORDING TO ASME VIII DIV I USING ASME SA36 MATERIAL? OR IT MAY BE USED ONLY FOR STRUCTURAL PURPOSE SUCH AS LEGS, LUGS, SUPPORT AR OTHER ATTACHMENTS?
THANK yOU FOR THE HELP.
REGARDS
THANK yOU FOR THE HELP.
REGARDS





RE: MATERIAL SA36
RE: MATERIAL SA36
SA 36 is of weldable quality. I.e. you can connect it to a vessel. It cannot be pressure containing.
RE: MATERIAL SA36
Regards,
Mike
RE: MATERIAL SA36
RE: MATERIAL SA36
RE: MATERIAL SA36
RE: MATERIAL SA36
RE: MATERIAL SA36
RE: MATERIAL SA36
Guess I have just seen to many quality problems in the use of a structural steel in a vessel application.
Sometimes it will not matter,per UCS-6,but I do not agree that it is most common for vessel application.
Cheaper is not always cheapest. I could tell you a number of poor result stories for A-36 but would need a new page.
INMHO: Angle,channel,non-pressure,its...OK,but for anything else...be careful.
RE: MATERIAL SA36
As an old steel maker, I can attest to the downgrading of many heats of other steels into A-36, which was the "catch all" for downgrades. In the past, the liklihood of laminations in A-36 plate was quite high, and the toughness of the material was especially low in the downgraded heats.
RE: MATERIAL SA36
RE: MATERIAL SA36
As to which is actually most common, I think that would have to depend on the experience of the user. I recall talking to one vessel fabricator that made virtually all their vessels from pipe. Or if you're using anything much over 1/2" or 3/8", it's going to be more economical to use A516-70 or some other material anyway, because of the higher allowables. F&D heads are commonly stocked in A516-70, and may or may not be available in A36. I'll bet half of all the ASME vessels in existence are air compressor tanks or propane tanks, and that would certainly skew the statistics to whatever those people use.
By the way, I recently saw a little aluminum air tank for sale (pressurize it, then use it to air up tires- maybe 5 or 10 gallons). Boldly stenciled on it was "Do Not Drop". That, to me, is scary.
RE: MATERIAL SA36
With regard to your statement, "I can only assume that the pressure vessel committee disagree[s] with that assessment", I think not, noting the further limitations put on its use relative to that of SA-516, SA-285, SA-515 (to name but a few) and other carbon steels. ASME Section I will not permit SA-36 plate in vessel or boiler construction. ASME VIII restricts its use to a maximum temp of 650 F and similar restrictions are invoked in both ASME B31.3 and B31.1 piping codes. On the contrary, ASME committees have been fully aware of the limitations of SA-36 and have made appropriate provisions.
RE: MATERIAL SA36
RE: MATERIAL SA36
I have no issue with what you are saying and if the Code allows a material and someone wants to build...so be it.
Over the years I have seen a number of problems with A-36 in PV use,,,,I just think there are better choices.
"Cheap" is not always the best answer. Pay up front or pay in back...nothing is free.
RE: MATERIAL SA36
I echo deanc's last comments and add that if one purchases SA-36 correctly, you can obtain SA-36 with quality equivalent to SA-515 or SA-516 or of slightly lesser quality that will certainly meet design/safety requirements for air receivers and propane/LPG bottles, etc. without adding to manufacturing woes.
I was also pointing out that if one intends to use SA-36 in vessel/ heat exchanger construction for the petrochemical and power industries, one should think again.
RE: MATERIAL SA36
small air PV are made with SA36 Code legal and 1,000's of them
so they are safe.
RE: MATERIAL SA36
The mentioned UCS 6 (b)(1) suggests that the vessel may leak. I agree that SA-36 may meet the SA-516 strength but also it may not. Lottery or russian roulette? I don't want it in my vessels.
Putting Human Factor Back in Engineering
RE: MATERIAL SA36
You might note that the lower grades of SA 516 won't necessarily meet the SA-36 strength requirements, either. That's not a reason to avoid them, just different materials for different applications.
If you're in the petroleum business (as I judge by your name), you probably already have acres of SA-36 plate in service in your atmospheric tanks.