Use of S275JR for pressure vessel Skirt
Use of S275JR for pressure vessel Skirt
(OP)
Dear Members,
we want to use S275JR in replacement of SA-283 C for structural parts of pressure vessel like skirt, base plate etc. But since this material is not listed in ASME SEC II PART-D, we are unable to use this material.
I would like to know if S275JR material listed in ASME code or does code suggest any alternate material for this grade. I need some written proof to get the acceptance of this material.
I would like to thank all the members in advance for any valuable input on this.
we want to use S275JR in replacement of SA-283 C for structural parts of pressure vessel like skirt, base plate etc. But since this material is not listed in ASME SEC II PART-D, we are unable to use this material.
I would like to know if S275JR material listed in ASME code or does code suggest any alternate material for this grade. I need some written proof to get the acceptance of this material.
I would like to thank all the members in advance for any valuable input on this.





RE: Use of S275JR for pressure vessel Skirt
Go to this document, where you can discover some findings. http://www.mesteel.com/qualities/equivalentscs.htm. Click on the General purpose structural steels.
Good luck!
El que no puede andar, se sienta.
RE: Use of S275JR for pressure vessel Skirt
As 21122956 said, look the steel up. For structural uses like skirts and platform beams, material only has to be compatable with the pressure boundary [ASME] material. And of course, strong and tough enough for the purpose that it will perform.
Example: A-36 is acceptable for most skirts, but not one that has a MDMT of -40°F.
RE: Use of S275JR for pressure vessel Skirt
RE: Use of S275JR for pressure vessel Skirt
Material for nonpressure parts, such as skirts, supports,
baffles, lugs, clips, and extended heat transfer surfaces,
need not conform to the specifications for the
material to which they are attached or to a material specification
permitted in this Division, but if attached to the
vessel by welding shall be of weldable quality [see
UW-5(b)]. The allowable stress values for material not
identified in accordance with UG-93 shall not exceed
80% of the maximum allowable stress value permitted
for similar material in Subsection C.
jt
RE: Use of S275JR for pressure vessel Skirt
jt
RE: Use of S275JR for pressure vessel Skirt
I agree with both jte and Duwe6 regarding the acceptibility of the material but how does one go about welding it unless the ASME IX WPS has been qualified with S275JR ? (as it is an unassigned material).
Not too familiar with ASME VIII but presume you would need qualified WPS for attachments to pressure retaining material ?
Cheers,
DD
RE: Use of S275JR for pressure vessel Skirt
RE: Use of S275JR for pressure vessel Skirt
Where did A 36 come in to the discussion ?
SA 283 is a P1 - S275JR is not.
The only way you can use S275JR in construction is to qualify a WPS with that material.
And sorry, but no, you cannot weld an AWS M # steel with an ASME IX P1 procedure.
Regards,
DD
RE: Use of S275JR for pressure vessel Skirt
I don’t have the codes or matr’l. stds. you refer to in front of me, and I don’t practice in this area every day. But, if the matr’ls. are compatible from the welding standpoint, and if the skirt matr’l. can handle the stresses imposed, corrosion and any temperature variations, what’s the issue? We have gotten to the point that we can’t blow our noses any longer without a code paragraph which approves this. What has happened to good sound engineering judgement and experience in guiding our designs? More and more, the codes are being written so that any dummy who wouldn’t even consider weld compatibility can do the design. This isn’t even engineering any longer, it’s just pretentious cookbook reading; just add a pinch of salt, no need to know why the salt is needed, or how much a pinch really is.
RE: Use of S275JR for pressure vessel Skirt
RE: Use of S275JR for pressure vessel Skirt
I agree with you totally regarding "structural" applications.
I may have gotten confused, in my limited past experience the skirts have always been welded to the vessel base and that was what I was trying to get across - any attachment to the pressure component requires an ASME IX WPS and S275JR is an "unassigned" material so it would require a new PQR/WPS.
Regards,
DD
RE: Use of S275JR for pressure vessel Skirt