Without getting an AI and a R-Stamp holder, nothing changes. As the owner, you can't just change the minimum thickness. You should contact your local jurisdiction for assistance.
Quality is not an act, it is a habit - Aristotle
Repairs, in general, fall under an array of requirements that vary depending on the circumstances.
What was the original Code?
What is the Code being used to make the repair?
What does the jurisdiction say?
What does the Inspector say (if there is one)?
Assuming this is an ASME vessel and the...
The fluid(s) won't determine the PWHT, the Construction Code will. Regardless of the tank being a reconstruction, the current code edition (or the one accepted by the jurisdiction) will have to be adhered to.
The basic location of holes and other dimensions can be used in the design. The...
As XL83NL stated, this is pretty much a no...but it does depend on what the specific jurisdiction allows. It may be possible that exceptions could be made.
On another note, is there any possibility of proving that the welds were made by a welder and wps that was (or can be) certified to PED...
All of this is based on the notion that the Jurisdiction is contacted and agrees with this plan.
1) You can request it from the OEM. In theory the same AI that signed the original document should be able to sign the new one. Though this needs to be done after the nameplate swap.
2) You should...
Since you're in Illinois, what does the Chief Boiler Inspector say on the matter? That would be your first call, not here. Specifically because Illinois keeps a record of each ASME boiler and vessel. They will probably say you can rip the nameplate off and de-classify it as an ASME vessel...
The process can take a substantial amount of time, but it is the best way to obtain a clear cut answer regarding this situation.
Quality is not an act, it is a habit - Aristotle
Would agree with willard3.
What does your governing body state is the regulating code? This would be the first step in my opinion, instead of asking here.
Quality is not an act, it is a habit - Aristotle
This probably should be sent to ASME as an interpretation (there may be one already, would be worth checking). Especially since there is a disagreement between a regulator and yourself.
Quality is not an act, it is a habit - Aristotle
There are support manufacturers all across the country that will build you custom Roof Top Unit curbs or stands. Often times the turn around time is decent unless the Roof Top Unit is highly custom.
Your suspicion is correct with the mentioned supply company, probably not going to fit your...
As david stated, as long as the material being switched is of the same or greater tensile strength, there is no issue. To add to that, the original thickness must be used in order to maintain the 'Repair' classification.
This is all based on the strength of the material already being calculated...
Putting a thin overlay on a thicker piece of material is typically where these types of procedures come into play.
Quality is not an act, it is a habit - Aristotle
The rating of the vessel is just that, the Maximum Allowable Working Pressure. If there is visible deformation of the vessel due to the over-pressurization, the vessel could be scrapped, depending on your insurance provider and/or your jurisdiction.
You could feasibly perform a redesign of the...
Both required, as stated above.
The shell will still need calculations (both of them) without a weld seam because the stress is still present. The Code makes considerations for this scenario.
Quality is not an act, it is a habit - Aristotle
Agree with above comments.
One thing to add, never 'revise' the PQR. Create a new one.
A PQR is intended to be written once, and never revised. Really the only reason to ever revise it would be if there were an administrative error discovered on the PQR that could be proven with other...
Unfortunately, ASME doesn't really address titanium too much simply because it isn't used often in pressure vessel construction.
That stated, ASME is the minimum. Depending on the purpose, using other criteria available to justifiably critique welds would indeed be ok, in my opinion.
Even if...
The size of the opening must be replaced in some way. With small fittings, the thickness of the coupling/pipe and the size of the weld suffice to meet this requirement. As the opening increases in size, the material must be replaced somehow. Reinforcement pads fit the bill perfectly, though...
As mk3223 stated, not a good idea to support one from the other. This holds especially true being they are different materials and different expansion/contraction rates.
The hanging mechanism(s) to support the steam pipe should be able to support a smaller diameter pipe run (such as you're...
