Our company has been asked to provide a temperature measurement assembly in Inconel 625, Grade 2. I find this grade for ASME SB-444 & -446, but not for SB-564 in ASME BPVC SEC. IID. I had informed the project managers that we would not be able to meet this requirement, and that additional solution annealing at the temperatures required for Grade 2 in -444/446 would not be allowable.
They then provided me with an MTR from 2013 for a 600# RFWN flange that had the following specifications:
ASTM B564-11, B446-03 N06625 GRADE-2 (SOLUTION ANNEALED)
FORGED PER B564 PRACTICE H.T. (GRADE 2) & MECH. PER B446.
DIM/TOL PER ASME B16.5-2009
I've always run calculations per the ASME BPVC code, so don't know if there are other codes that will allow use of ASTM standards that may accept a flange with this combination of specifications. I assume that this would not be allowed in an ASME U-stamped vessel. If it would, please let me know how. Thanks.
They then provided me with an MTR from 2013 for a 600# RFWN flange that had the following specifications:
ASTM B564-11, B446-03 N06625 GRADE-2 (SOLUTION ANNEALED)
FORGED PER B564 PRACTICE H.T. (GRADE 2) & MECH. PER B446.
DIM/TOL PER ASME B16.5-2009
I've always run calculations per the ASME BPVC code, so don't know if there are other codes that will allow use of ASTM standards that may accept a flange with this combination of specifications. I assume that this would not be allowed in an ASME U-stamped vessel. If it would, please let me know how. Thanks.
