Need Professional Engineering Safety Approval/Stamp 2

[pWr93]

I manufactured a pressure vessel that will be used for testing chemical reactions under high pressure (~3000psi). Long story short, I've done my math and believe that this pressure vessel will hold pressures over 3000 psi, even up to 4500 psi but I cannot "certify" my device because I don't have my PE license (feel free to enlighten me on how getting the ASME stamp works if you can). I wanted to know what is the best way to get a stamp from a professional engineer or company that lets people buying my product know that it is safe?

 

[JStephen]

You've got several issues involved there, and it's not clear exactly where you're at.
First off, somebody's got to decide what pressure the thing ought to handle. For containing high-pressure chemical reactions, especially for testing those reactions, that will NOT be a simple question. You can't just say "This is ultra-strong", fill it full of gunpowder and set it off. That may be a chemical engineering question, come to think of it.
Next, assuming you can ascertain exactly what pressure rating is required, look into the codes required. Specifically, there is a Section VIII Division 3 for high-pressure that might be applicable. It would be worthwhile to have somebody that is very familiar with the design of high-pressure vessels going through the design. If you expect to sell this internationally, you may want to look into other codes as well.
Thirdly, the PE end of things will probably take care of itself. If you have people knowledgeable on the first two items, you'll probably also have your PEs. Also note that in many cases, design of a manufactured item is exempt from PE requirements. But, I'm thinking Division II and maybe Division III require a PE for design- perhaps some others can confirm.

On a side note- this video is very informative:

https://www.youtube.com/watch?v=C561PCq5E1g

If I remember right, one of the issues was that the products reacted faster than anticipated as heat and temperature increased, and they weren't prepared for those conditions.

 

With due respect, are you building this in your garage?

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[TGS4]

Was this vessel designed to any recognized Code/Standard?

 

[SnTMan]

pWr93, one does not need any particular credentials to design a vessel to certain Codes, such as Sec VIII, Div 1. One only has to follow the rules therein. Note that these Codes usually exempt certain vessels based on volume, pressure, temperature and so forth. The vessel may then be fabricated in accordance with by a shop holding an appropriate stamp or some equivalent arrangement. The fabricator applies the stamp to the completed vessel, and presto, it is "certified".

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand