Spec'ing up new Pressure Vessels

[DW1006]

All,

Just looking for a bit of a brain dump of things to consider when spec'ing up new Pressure Vessels.
We are going to replacing some of our air farm systems due to aging assets, primarily vessels and connecting pipework.
Just looking for some input as to considerations/improvements I can capture in a statement of work.
Pressure Vessels contain clean dry air and ambient temperature. Max SWP of 600psi.
Stuff I can think off the top of my head is:
Built to PD5500
Vessels rated and pressure tested to allow for SWP of 600.
One vessel we need to restrict to 300psi, so will need some sort of reducing control valve and PSV to ensure system is protected.
2 valve isolation on all outlet flanges of the vessels to allow us to carry out maintenance on downstream rig safety without the need to drain these vessels.
Access holes built in to allow for planned maintenance and internal inspections during out of service inspections by a notified body.
Groundwork surveys to ensure ground is suitable for size of vessesls.
Pressure relief valves on all vessels.
Pressure indicators on either side of the 2 valve isolation.
Pipework and flanges in accordance to a known standard.ie ASME B31.3 AND B16.5.
Full QA pack to be provided.
Corrosion protection finish applied to vessels. I.e painted.

Anything else to add, in sure there is?

 

[SJones]

Maybe some help in the attachment.
The associated spec, quality requirements, and documentation requirements are at:

https://www.iogp.org/bookstore/product/s-619-pressure-vessels-unfired-fusion-welded-v2-0/

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

 

[DW1006]

Cheers for the link, very useful!

 

[EdStainless]

Your coating needs to have specifications listed, and your preferred coatings.

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P.E. Metallurgy, consulting work welcomed

 

[Krausen]

I always like to include new marking requirements on new pressure vessels with my specs (e.g. tag number, weight, marking locations, dimensions of the markings, etc.). For new coatings/paints, make sure to specify the final top coat color you'd like too.

PIP VESV1002 (Design & Fab Spec for Vessels) may also be good standard to reference when creating any new spec for any new pressure vessel, although this is geared to ASME VIII vessels