• Dear all

    I created all required catalogs for piping components that have ring type joint facing. I took the overall length for valves from face to face (Ring groove is included).  
    My question is:

    What thickness of the ring gasket shall i use for these components? I think 0 mm is not the right choice.

    Note: for example I selected R47 gasket for my 6'' valves #2500 RTJ. In this case the gasket will disappear in the groove after bolting.

    shall i use the distance between flanges (4 mm for my example) as a gasket thickness?

    Thank in advance.
  • There is no space left after the gasket fitted into two flanges?

    You should substract gasket thickness (from standard) - groove width of flange 1 - groove width of flange 2

    this value is final gasket thickness.
  • Hello Deva
    For a 6'' flange (ASME B16.5) #2500 RTJ, we have a groove thickness of 12.7 mm and the overall length of the flange is 285.7 mm
    What i understand from your reply is:
    in the flange catalogue, the overall length is 273 mm
    in the gasket catalogue, the thickness is 25.4 mm
    Am i right Deva?
    thank you for your reply.
  • [QUOTE=Sargon;112612]Hello Deva
    For a 6'' flange (ASME B16.5) #2500 RTJ, we have a groove thickness of 12.7 mm and the overall length of the flange is 285.7 mm
    What i understand from your reply is:
    in the flange catalogue, the overall length is 273 mm
    in the gasket catalogue, the thickness is 25.4 mm
    Am i right Deva?
    thank you for your reply.

    Groove Width is provided for Flanges?
    From Gasket Overall thickness subtract these groove widths from two flanges.
    e.g. gasket thickness 25.4
    groove width for flange 1 is 7, groove width is for flange 2 is 7
    Now your gasket thickness is 25.4 - 7 - 7 = 25.4 - 14 = 11.4
  • [QUOTE=Sargon;112604]Dear all

    I created all required catalogs for piping components that have ring type joint facing. I took the overall length for valves from face to face (Ring groove is included).  
    My question is:

    What thickness of the ring gasket shall i use for these components? I think 0 mm is not the right choice.

    Note: for example I selected R47 gasket for my 6'' valves #2500 RTJ. In this case the gasket will disappear in the groove after bolting.

    shall i use the distance between flanges (4 mm for my example) as a gasket thickness?

    Thank in advance.

    To me it should be ZERO.
    Anyway, it depends on where you created P-Point 1 on the flange...
  • Hi Corrado

    Some standards tell you that some space is left after  bolting. For my example, 4mm is obtained from "PIPEDATA PRO" as a space  between two mating flanges. Regarding my P-Points, I used the same  philosophy in AVEVA catalogues (AAFWRJ??).

    Thank you my favorite member.
  • Some standards tell you that some space is left after bolting. For my example, 4mm is obtained from "PIPEDATA PRO" as a space between two mating flanges.


    So in this case the P1-P2 distance of the gasket should be 4mm