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Discussion
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Hi all
i have one query regarding the selection criteria of different material while the design and operating parameters
of the Steam is same .
In detail , HP steam main line ( from HRSG to Turbine ) having size DN 300 , Design Temp. 572 ,Design Pressure 153 the material chosen is alloy steel (A335 P91) .
Also the drains of the main line having size DN 25 , Design Temp. 572 ,Design Pressure 153 the material chosen is alloy steel (A335 P91) .
But the sampling ( continuous) lines taken from this main line having size DN 10 , Design Temp. 572 ,Design Pressure 153 the material chosen is stainless steel (A312 TP316 H) .What could be the reason for selecting different material for sampling line as compare to material of main line and its drain ???
Regards
SG
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