Searching for a code if any (vessel) 2

[supers0nic]

Hey guys...I have a vessel that contains a solution of a flammable liquid diluited in water (ammonia like) at atmospheric temperature and pressure. The vessel capacity is less than 0.5m3. The vessel doesn't have a nitrogen blanket. Vapor outlet is connected to a hood w/ extractor. Is possible not to apply ASME VIII Div 1? Is any other code or normative that I could apply? (ANSI, API, BS, etc)

Thanks in advance!

 

[supers0nic]

PD: vessel material is stainless steel. Plastic is not allowed.

 

[metengr]

What does the local Jurisdiction or regulatory body require where this object is installed regarding exemptions for pressure vessels based on pressure, contents or size?

 

[supers0nic]

metengr, gonna take a look

 

[JStephen]

Note that some jurisdictions don't have vessel code requirements.

 

[XL83NL]

Whats the location where the vessel is installed/used?

 

[LittleInch]

Come on guys, providing this is truly designed as an Atmospheric vessel, its not a pressure vessel, but a tank. ASME VIII AFAIK is not designed for anything under 15 psig, but even tank design allows some design pressure.

You probably just need to design to a local standard or perhaps look at this thread

http://www.eng-tips.com/viewthread.cfm?qid=377874

for some ides.

At 0.5 m3 this is a small horizontal cylindrical tank.

Supersonic - Check what the design pressure / MAWP is for this tank. Anything below 15 psig should mean it's a tank not a pressure vessel - the hint is in the name....

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[supers0nic]

Tank will be Located in Argentina, South America. Local jurisdiction don't have vessel code requirements.

I have a mechanical engineer friend of mine that suggested to use ASME IX (only for the welds).

Design pressure is 3 bar. An inlet connection receives liquid from the recirculation of a positive displacement pump.

 

[supers0nic]

PD: At this time I don't know if it is a Tank or a vessel

 

[LittleInch]

Ok, that's new information. First see if you can actually re-rate the design pressure. If the vent is atmospheric and there's no way to seal it off, having a design pressure of 3 barg is really overkill and will cost you a lot more than an "atmospheric" tank. A bit of work on the process side will more than save the money and time.

If you don't want to go down that route then you are really looking at a Pressure Vessel code of some sort. You might have got away with a design pressure of less than 1 barg, but 3 is too high.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[supers0nic]

Good. I understand that is possible to re-rate if the vent outlet is big enough compared to the pump flow.

 

[Duwe6]

At 3 bar, it is a pressure vessel. Falls under ASME VIII.
At [up to] 1 bar, it is a 'tank' and you can use API-620, UL-142, API-12F [very low psi]

 

[supers0nic]

I just found the PIP VESLP001 Low-Pressure, Welded Vessel Specification really useful as a guideline.
It states what Duwe6 said in the previous post.