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  1. Jadson

    ASTM A335 P91 - High Pressure Piping Design, B31.3, Chapter IX

    Thank you all very much for your answers. Therefore, as a conclusion, if I use ASTM A335 P91, I´ll have to calculate the allowable stress values at design temperature not exceed the lower of two-thirds of SY and two thirds of Syt. But I think there is a reason for ASME not to use ASTM A335 P91...
  2. Jadson

    ASTM A335 P91 - High Pressure Piping Design, B31.3, Chapter IX

    I'm trying to determine the wall thickness of a pipe that has a design pressure of 15,000 psi at 700 F. The specified material is ASTM A335 P91. I have to use ASME B31.3 chapter IX (defined by the owner). The problem is that ASTM A 335 P91 is listed only in Appendix A. Can I use the allowable...
  3. Jadson

    N80 AS A LINE PIPE

    Thanks for all the replies. jojoyohan, you´re right, maybe I have to use piping and fittings custom built. LittleInch, thank you. The version I have is B31.3 2016. I am trying to request the latest version for my company. However, in any version, ASME B31.3 allows the use of unlisted...
  4. Jadson

    N80 AS A LINE PIPE

    Thanks for all the replies. We are designing a process plant, which the following are the main design conditions: Pressure disign: 15000psi Temperature of system: 0°C (32°F) and 200°C (400°F) Fluids: Water and Nitrogen. Estimated quantity: 2000m I had selected the X70 and the X80, but to use...
  5. Jadson

    N80 AS A LINE PIPE

    Has anybody ever use the N80 or other API 5CT one to use as a line pipe? It´s possible? I need a material that resist 15000psi at 400°F. There aren´t materials listed in ASME B31.3 (table A1 or table k1) that results in acceptable thicknesses.Does anyone have a sugestion?
  6. Jadson

    Upper temperature limitation of API 5CT N80.

    Thank you KeVinNZ! It´s difficult to find this factors. I have another question. Has anybody ever use the N80 or other API 5CT one to use as a line pipe? It´s possible? I need a material that resist 15000psi at 400°F. Does somebody have a sugestion?
  7. Jadson

    Upper temperature limitation of API 5CT N80.

    I am designing a pipe line, based on B31.3 Chapter IX. Design conditions: P (internal design gage pressure) = 15000psi T (design temperature) = 400°F d (required minimum inside diameter of the pipe )= 5,125in There is no material listed (table A1 or table k1) that results in acceptable...

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