PV Designer vs. Manufacturer 1

[22west]

I'm a little confused on the responsibility of an engineer who provides pressure vessel design services.

Consider the following secnario :

A engineer who provides pressure vessel design services produces calculations and drawings for client for a particular vessel.
The client then takes the calcs and drawings to an ASME certified shop to have the vessel made.

If the ASME certified shop is unltimately responsible for the vessel design and construction, wouldn't the original engineers calcs and drawings be redundant? By this I am assuming that an engineer at the ASME shop is going to examine and check the original engineers calculations and drawings to the point that they might as well have done all the work themselves.

 

[vesselfab]

the asme shop can/will use any furnished calculations or drawings furnished AFTER they have reviewed and checked for accuracy and code compliance.

It's the rules.

THEY have to certify that the vessel complies with code rules...not the designing engineer.

To not check them would be ludicrous and putting their living on the line.

 

[gr2vessels]

22,
Your scenario is incorrect and will never occur. The Client will pay for an "outside" design only if the fabricator is unable to produce one (his designer died last night or is in holiday on Maroc, etc..). The Client and his design verification team will review the design and release it for fabrication, in conformance with the Code. The fabricator will review the design signatures and makes a contract with the Client to fabricate and guarantee the fabrication only, not the design. The AI will review the fabrication, inspection and testing to ensure conformance with the code. The Client takes the finished product for installation on his plant, the fabricator takes his money, everybody is happy. What's wrong with this scenario?

 

[vesselfab]

nope

fabricator, the one who "CERTIFYs" the vessel is totally responsible for the mechanical design of the vessel, no matter who prepares the design.

He must review, accept, or modify the design.

But in the end, when he puts his stamp on the vessel, he is responsible for the mechanical design.

NOT an outside consultant or other engineer.

 

[zerosum]

I assume this discussion assumes Section I and Section VIII Div 1 vessels?

 

[JoeTank]

I agree with vesselfab. The vessel Manuafcturer accepts responsibility for the whole thing, including design. So, the Manufacturer must verify that design meets Code.

Joe Tank

 

[JStephen]

In the original post, it would be more likely the vessel fabricator that hired the engineer for that scope of work.

If the owner hires an engineer on a job like this, they're more likely to be involved in system design and specifying the vessel, rather than detailed design of the vessel.