mechengineer
Mechanical
- Apr 19, 2001
- 260
Dear Experts,
ASME VIII-1 requires the bolt load design to meet the requirement ASME PCC-1 Appendix O.
UG-44(b)(2) The actual assembly bolt load (see Nonmandatory Appendix S) shall comply with ASME PCC-1, Nonmandatory Appendix O.
PCC-1 is the reference standard in ASME VIII-1, Table U-3
NONMANDATORY APPENDIX S DESIGN CONSIDERATIONS FOR BOLTED FLANGE CONNECTIONS.
PCC-1 Appendix O is without considering m & y of gasket factors and does not provide Sgmin-o and Sgmin-s. How to determine Sgmin-o and Sgmin-s becames important. Since the design shall consider PCC-1 Appendix O that required by code, Sgmin-o and Sgmin-s will become the design condition, why does not PCC-1 or ASME Appendix-2 provide the recommend Sgmin-o and Sgmin-s? Currently Sgmin-o and Sgmin-s may be from API 660 Table-3 for heat exchanger girth flange design. I think that if the same type of flange and gasket, whatever it is girth flange or pipe flange the design philosophy shall be same. However, API 660 table 3 gives the same Sgmin-o and Sgmin-s whatever spiral wound, grooved metal with soft facing and corrugated with soft facing gaskets. That makes the gasket advantage improved by research and effort meaningless.
Welcome your opinion and input.
Regards,
ASME VIII-1 requires the bolt load design to meet the requirement ASME PCC-1 Appendix O.
UG-44(b)(2) The actual assembly bolt load (see Nonmandatory Appendix S) shall comply with ASME PCC-1, Nonmandatory Appendix O.
PCC-1 is the reference standard in ASME VIII-1, Table U-3
NONMANDATORY APPENDIX S DESIGN CONSIDERATIONS FOR BOLTED FLANGE CONNECTIONS.
PCC-1 Appendix O is without considering m & y of gasket factors and does not provide Sgmin-o and Sgmin-s. How to determine Sgmin-o and Sgmin-s becames important. Since the design shall consider PCC-1 Appendix O that required by code, Sgmin-o and Sgmin-s will become the design condition, why does not PCC-1 or ASME Appendix-2 provide the recommend Sgmin-o and Sgmin-s? Currently Sgmin-o and Sgmin-s may be from API 660 Table-3 for heat exchanger girth flange design. I think that if the same type of flange and gasket, whatever it is girth flange or pipe flange the design philosophy shall be same. However, API 660 table 3 gives the same Sgmin-o and Sgmin-s whatever spiral wound, grooved metal with soft facing and corrugated with soft facing gaskets. That makes the gasket advantage improved by research and effort meaningless.
Welcome your opinion and input.
Regards,