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I have been working on the design of a small API650 Tank and I'm having some issues with the spacing that between nozzles and welds. To be more specific, if we look at Figure 5.6 and 5.7.3 I have something close to the requirement for distance E. Also, NOTE 2, specifies the following: "Weld...

Dear All, I'm currently working on a project for a small API 650 tank (4 m3) and looking for nozzles and vessel design I'm kind of confused about the criteria on when to consider inside projection of nozzle and shell manholes on vessel body (shell) You can see here in this drawing that the...

Hi Everyone, I'm currently developing a project that includes several similar modular units with several instrumentation and pumps package. The thing is that the electrical classification of the area where the equipment and instruments are to be installed is Class 1, Div 2, and installation...

Sorry for the confusion buzzp and thanks for the reply djs. Actually, I did not notice it was also you from the previous post. In any case, I can find different opinions on if a NEMA 4x enclosure can be used or not. Someone also told me that if everything is rated, less restricted enclosure...

Thanks buzzp for your answer. I will check the NEC articles you mentioned for my reference. I am interested in the solutions you have used for PLC+HMI in a hazardous location. This knob thing and stuff. Can you give me more details about it? I read something about it but proper HMI has to be...

Thanks, thebard3 for your response. Regarding the first comment, you mentioned "If everything is so rated, then no other design considerations need to be employed". Then what about the enclosure, Can I put everything in a NEMA 4X one? Or still, need to use another kind of enclosure (increased...

Hi everyone, Can someone tell me if there is a way to use a PLC+HMI in a NEMA 7 enclosure (explosion-proof enclosure)? Hazardous Location is Class I, Division 2, Group D. I have read many posts but not sure they usually suggest using a purge system which is not my case since I don't have the...

Hi eveyone, I would like to receive some advice on a particular issue I have with a Control Panel . I need to provide a Control Panel with a PLC and HMI in an enclosure. The point is that it is for a Hazardous Location: Class I, Division 2, Group D. If it's possible to use a NEMA 4X...

Hi everyone, I have some doubts that I would like to receive some help. We've imported an oil-water separator tank which is constructed based on UL 58 (double wall tank for underground installation)for our customer. I requested our supplier to provide all quality documentation for our customer...

Thanks for your considerations. You most likely are aware of all my questions. The storage tank just will retain 12 hours or 7 hours of this acqueous solution. Chemical Supplier says that storage this solution for 1 día is not critical (just like you are saying) However, I don't know how to...

Hi everyone, I apologizes in advance because this post will be too long.. Really sorry for that. I have some problems in the design of a Sodium Metabisulfite plant for a gold mine. I'll explain all the content and basically is as follow: ENVIROMENTAL CONDITIONS Humidity is around 70-90%...

Hi everyone, I'm currently working on a mining project for a gold mine that involves the usage of Sodium Metabisulfite. They will mix Sodium Metabisulfite with water to create a first solution at 30% in a make up tank (preparation tank + mixer/stirrer) and after that will be deposited in a...