NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
(OP)
Does anybody can help me out?
I am looking for RTJ Ring Gaskets for NPS 14 Thru 24 flanges with design pressure 5000 psi @ 400 degree F. Per ASME B16.5, the allowable pressure for CL 1500 is less than 5000 psi.
As 14"-24" CL2500 flanges are not listed in any Codes, the high pressure flanges need to be designed per App.2 of ASME VIII DIV.1 or other methods. Can we use the CL 1500 RTJ Ring gaskets? For example, use gasket R63 for 14" flange; use R67 for 16" flange; R71 for 18" flange; R75 for 20" flange; R79 for 24" flange under 5000 psi, 400F condisiton.
Thank you for your response in advance.
I am looking for RTJ Ring Gaskets for NPS 14 Thru 24 flanges with design pressure 5000 psi @ 400 degree F. Per ASME B16.5, the allowable pressure for CL 1500 is less than 5000 psi.
As 14"-24" CL2500 flanges are not listed in any Codes, the high pressure flanges need to be designed per App.2 of ASME VIII DIV.1 or other methods. Can we use the CL 1500 RTJ Ring gaskets? For example, use gasket R63 for 14" flange; use R67 for 16" flange; R71 for 18" flange; R75 for 20" flange; R79 for 24" flange under 5000 psi, 400F condisiton.
Thank you for your response in advance.





RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
Let me take a example for this: We have a pressure vessel, design pressure 5000 psi at 400 deg F. all other nozzle sizes less than NPS12" (these nozzles will have piping connections,) we can select 2500# flanges per ASME B16.5, and there are 2500# RTJ ring gaskets available as well. For 2500# flanges, MAWP will have about 5280 psi at 400 deg F. Now we need a access inspection opening NPS 14", but 14" 2500# is not listed in ASME B16.5. For this flange we can design per Appendix 2 of ASME VIII Div.1, but there is no 14" 2500# RTJ ring gasket available. Can we use a standard 14" 1500# RTJ ring gasket? if not what standard/ code can we follow to design a gasket that allows 5000 psi? (Note: the MAWP of 14" 1500# flange is about 3170 psi at 400 F.)
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
You can use 14" 1500# gasket if the gasket dimensions has been considered in design of flange as per ASME VIII Div2 .
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
Please read it as ASME VIII Div1 .
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
Based on what you said, through 14" 1500# RTJ ring gasket is for 14" 1500# flange (say the MAWP of the flange is 3170 psi at 400 F for SA105 material), the gasket itself can have pressure rating greater than 5000 psi. Do you have any reference support this?
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
As far as appendix 2 is concerned, rating of the gasket (dimensional standard) does not matter. It is concerned with ID and OD and gasket properties. You can use any dimensions of gasket (non standard) with a condition that the gasket should lie between flange id and bolting.
My explanation is not making any sense to you because you did not know what is there in appendix 2.
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets
rmorgan@ltsenergy.com
Rick
RE: NPS 14 Thru 24 CL2500 RTJ Ring Gaskets