How to figure a continuous service rating

[QAFitz]

A small needle type valve has a pressure rating of 3500 psi and a temperature rating of 900 F but the manufacturer (who is no longer around) doesn't indicate if this is a continuous service rating. What testing must I do to assure myself the stated psi/temp will work in a continuous 3500-psi, 900 F application?
What's the ASME/ANSI Standard I should buy to check this out?

Thanks in advance for your time.

 

[athomas236]

I assume you have checked the maintenance manual and the valve list and found nothing.

The valve may have been supplied through a third party such as the turbine supplier in which case they may have a record.

Regards,

athomas236

 

[jte]

Fitz-

This really belongs in forum408 where you'll get a much better audience. I'd suggest you repost it there then hit the Red Flag button and ask for this thread to be removed.

jt