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JStephen - yes and yes to the first two questions, however the volumes are quite large and the calculations seem complex to work out the dynamics to understand whether an impermeable barrier is required or not. These are two separate dikes so design can be different for each. Thanks for your...

Thanks all for the suggestions: Zelgar - yes have considered double wall tanks but unfortunately not going to be suitable for this application. Littleinch - thanks. Assume the pre-stressing of the concrete makes it more suitable for low temperature? Temperature in this case is < -150 C...

Hi all, I'm looking at some large storage tanks which require full secondary containment bunds / dikes. Some vessels store cryogenic product, and other tanks store high temperature product > 400 deg.C. Looking for advice on what could be a suitable construction method for these bunds in...

XL83NL - thank you very much for the link to the older threads, that's excellent. I'll work through those to educate myself and get back to you for any further queries. In terms of specifics, we have a number of different services, but at the most extreme ends we have cryogenic service in...

UK

Thanks for the reference to the DNV document, I was able to get a copy which is very helpful. 1503-44: This is piping inside a plant for a thermal energy storage application. If I understand correctly, if opting to use ASME codes in Europe, it is advisable for us to engage with our notified...

Hi All, We have a project in Europe for an energy storage application. As we have some international projects in the pipeline, we are considering designing the piping to ASME B31.3. I understand this to be an acceptable and a common approach in some sectors in Europe, provided compliance and...

Hi all, thanks for the feedback, very much appreciated and all makes sense.

Hi all, Looking for some tips on best practices in HP steam pipework design in thermal power plant (design pressure up to 200 bar). I appreciate that there are a number of variables here, but my first question is, at heat exchanger / steam drum nozzles and at valves, would it be the usual...

Hi all, I’m interested in learning more about the function of the pressure building circuit for cryogenic storage tanks. Wondering if anyone can suggest a good book on cryogenic storage systems which would cover this. Specifically I would like to understand, for a vessel storing cryogenic...

Thank you Pierre and EdStainless, that's very helpful.

Hi all, Looking for guidance on recommended good practice for specifying fouling factors for the process air side of heat exchangers used in an air separation process. We have air cooled heat exchangers, S&T heat exchangers and a brazed aluminium plate-fin heat exchangers in a cold box. I...

Thank you all for the advice and suggestions. We will speak to some vendors for further advice on air cooler type and design and look to appoint a specialist company to undertake a hot plume study. To answer the query from @georgevarghese, the required exit process stream temp is approx. 260...

Hello all, Looking for some direction for any codes, standards or best practice guidance when it comes to the maximum temperature limits that would be considered acceptable for the discharge air stream for an air cooled heat exchanger. Our ACHEs would be mounted on a pipe rack at high level...

Thank you HTURKAK for the input and for the document link. The design option in this document as proposed by S, N. Technigaz looks very similar to a membrane type LNG tank? I'm not aware that this design option has been used by any of the commercial CSP projects for storage of nitrate salts.

MJCronin thank you for your feedback which all makes sense. Yes - "cold" tank in carbon steel and "hot" tank in more expensive alloy. Yes, agree that there are no existing and accredited codes. The experience in this area is in the CSP industry where there have been lots of lessons learned...

Hi all, We are at the feasibility stage of a project requiring a site built molten salt storage tank which has a maximum operating temperature of 435 Deg. C. This would be designed based on API 650 with some additional requirements considering the high temperature. My question is regarding...

MJCronin, thanks as always for the candid response! I don't think my process engineer is under the influence... I will check on the design pressure - the vapour pressure of the liquid at the operating temperature is a couple of bar lower, but still the pressure will be far higher than what I see...

MJCronin - thanks for the feedback, this is helpful. This is a novel/niche application, hence the deviation from the norm. As you suggest breaking the tankage into a number of smaller vessels looks like the right way to go. Thank you for the link to the document, this is very helpful. Any...

LittleInch thanks. Not LNG but another cryogenic liquid. Flexible on design options. Looking at multiple smaller vessels or single larger vessel.