1. What is material of original stainless steel cover (vendor call
envelop) is SS316 or SS316L or SS304 or SS304L? please confirm and it is better to follow the same material as original, the different material has different mechanical property and may cause the sealing performance.
2. What is thickness of stainless cover? Vendor not indicate and it
shall be same thickness as original.
3. Vendor will provide stainless cover? And not just graphite? As we
discussed before that stainless cover still with good condition and may reuse.
4. The quantity shall be total 4pcs (steam blow time use 2 for HRSG#1
& HRSG#2 and replace after steam blow), vendor indicate as 1 set only.
Please note that we have no much concern for steam blow as steam blow condition not so high (about 10barg and 400°C), but plant operation condition was very high and with high requirement for gasket sealing.