What are you trying to sell here (to Shell or to any other company that have similar design validation)? Valves or just TAT certificate to complement your product to other companies (sales pitch).
If the second one you're aiming, suggest to forget it since it has some kind of disclosure agreement and Shell aware of such action in some extend.
I am working for the company mention, however my explanation below do not reflect my company official best practice. this is purely for simplified explanation only.
Is your valves TAT potential candidates? Let say the design Class is 300#, design temperature is -29 degC (theoretical winterizing in Europe) and 400degC. Body material is A105N.
Do internal test as follow:
- at ambient temperature, MAWP as per ASME16.34 for A105N, cycle valve 80 times --> measure Fugitive Emission, Seat leakage and Body test
- at 200degC (intermittent temp), MAWP as per ASME16.34 acc to its temperature, cycle valve 100 times --> measure Fugitive Emission, Seat leakage and Body test
- at 400degC (max temp), MAWP as per ASME16.34 acc to its temperature, cycle valve 80 times --> measure Fugitive Emission, Seat leakage and Body test
- Ambient
- at -29degC (min temp), MAWP as per ASME16.34 acc to its min temperature, cycle valve 100 times --> measure Fugitive Emission, Seat leakage and Body test
- Final ambient temperature, MAWP as per ASME16.34 for A105N, cycle valve 80 times --> measure Fugitive Emission, Seat leakage and Body test
PS: In order to be considered for TAT success, the first criteria is all Fugitive Emission, seat leakage and body test must be consistent within range for all phases mentioned above
Not to mention, the inspection of material chemical and mechanical properties, consistencies, etc.
Let say price for TAT is 50kEUR with whatever result. Failing the test you have to re-do the test
Pass your own test and still interested to do official TAT? Ok, your selling price still have to be competitive (read: market price) for any quantities requested
What is the price of your tested valves (2"-300# Gate valve) let say 2000 EUR/each. How many order promised by the end user per year? None. Yet you have to BEP over the TAT cost.
since the valve tested A105N, can you supply Duplex valve to Shell? Most likely not, you have to do another TAT
The best practice is supply and demand. If you're aiming to supply one of end user site (which have dedicated Mechanical or valve engineer), contact him/her of what is the best approach? He/she will guide you further.
Or maybe your product is really special e.g. sampling valve, Cracking application, really high temperature application, etc.?
Hundreds of similar TAT inquiries offering same thing, can imagine that your inquiries may never been replied. There is no agency, and I cannot provide the direct contact.
Kind regards,
MR
All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected