P91 or P92 Supplier
P91 or P92 Supplier
(OP)
Hi everyone,
I am looking for a supplier that could supply blocks of P91 or P92. It is needed for the manufacturing of large specialized (high pressure/temperature) control valve casings.
The location of the supplier isn't crucial...
Regards,
Philip Oosthuizen
I am looking for a supplier that could supply blocks of P91 or P92. It is needed for the manufacturing of large specialized (high pressure/temperature) control valve casings.
The location of the supplier isn't crucial...
Regards,
Philip Oosthuizen
Philip Oosthuizen
Company info:
SteinMuller Engineering Services
http://www.steinmuller.co.za/





RE: P91 or P92 Supplier
Some steam turbine vendors also provide F91 main steam stop valves ( Siemens) , to avoid the thick walled disimilar metal weld ( ie, P91 pipe to 1.5 Cr .5 Mo V cast) that other stg vendors had used but which are at risk of prompt fatigue failures .
All it would take is to call a dozen major valve vendors, and at least half would offer the F91 or C12 A option.
To weld to these valves, you would need to ensure the "designer" that is designing and specifying the weld interface between pipe and valve has persons employed that have been educated in the metallurgical peculiarities of these materials, and also treats these weld interfaces as critical areas that need to be reviewed in detail from the standpoint of stress analysis and fatigue damage during fast startups and shutdowns. QC and NDT procedures and documentation shuld be much more stringent than defined by current ASME code requirements.
RE: P91 or P92 Supplier
Plenty of suppliers in China:)
Sorry I couldn't resist.
Mike