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metengr, If I use the values from ASME Sec. II PART D, Have I to apply some factor of safety? or I can use the listed values? Thanks.

Hi All, For example, the material SS 904L = 1.4539 = N08904. In B31.3 tables is not defined this material (or I dont find). This material (UNS N08904) is name in "Specification Index for Appendix A" (page 134 B31.3-2006), but there is not values of stress at diferentent temperatures in the...

MikeMet, Thank you for your information. I am searching the values of the "Basic Allowable Stresses" (S) in B31.3 tables for Alloy 617=N06617 and Alloy 718=N07718, but I don´t find it. Where I can find this data (at the temperature) to use in B31.3 calculation? Thanks.

metengr So, do you think that Alloy 625 is not valid for this temperature?

metengr I am using B31.3 Do you recomemded another one?

Hi All, I have designing a piping system in very high conditions. It´s a based water fluid and the conditions 350 bar (5076 psi) and 760ºC (1400 F). I am thinking in pipe B444 Alloy 625 (UNS N06625). The pipes that I need are 3/4", 1" and 1 1/2", but the thicknness obtained in the calculation...

Hi All, I have a question concerning Code ASME B31.3-2006. In 304.1.2.- Straight Pipe Under Internal Pressure are the equation (3a) and (3b) to calculate the pressure design thickness. Above, in 304.1.1 General (b) is defined S= stress value for material from Table A-1. In this table there...