In Service Heat Recovery Steam Generator (HRSG) Hydro Test 1

[andrenov]

Dear Floor,

Here in our asset we have Heat Recovery Steam Generator (HRSG) which is 11 years old.

This HRSG utilize flue gas from Gas Turbine to make steam. Feed water comes in to the HRSG thru 6" pipe and exit as steam thru the same size pipe.

Steam pressure is about 740 psig and the temperature is about 540 F.

Currently, we want to conduct hydrotest. what code & standard that appropriate for this test?

Should Asme Sec.1 Para 99 be the match reference for that?

Are there any code & standards more appropriate for this case?

Kindly need your advice..

Thank You
Best Regards,

Andrenov

 

[Bocephus50]

You need to find Code stamping of each of the separate pressure boundries (or review the mfr's data report...mayne form P-3 with attachements). There are several different pressure boundaries on a HRSG, and unless you isolate each boundary, just be sure not to overpressurize the lowest boundary (unless you have isolated it from the rest). It sounds like the 700psi would be within the range of the lowest pressure boundary since high pressure side is 1500psi. Check the ASME Data Report or locate the various stampings (they may or may not all be stamped on one plate or located in one spot).