the allowable operating temperature for a design life of ASTM A335 P11 pipes 1

[MHR1990]

WHAT IS THE ALLOWABLE OPERATING TEMPRATURE RANGE FOR ASTM A335 P11 PIPES? OPERATING SERVICE TEMPRATURE AND NORMAL OPERATING PRESSURE IS 500 C AND 5.0 bara AND DESIGN TEMPRATURE IS 515 C. THE SERVICE FLUID IS COKE.

IT IS MY UNDERSTANDING BASED ON ASME B31.3 TABLE K-1 THAT USING P11 ABOVE 700F(371C)IS PROHIBITED.
Any web-based references or "white papers" would be appreciated...

 

[TGS4]

Allowable stresses in Table A-1 (Table A-1M) for A335 P11 material goes up to 1200°F (650°C). The allowable stress at 515°C (959°F) is 60.68 MPa (from Table A-1M) or 8,760 psi(from Table A-1. This is not an exact unit conversion, but is based on linear interpolation from Tables A-1 and A-1M).

Table K-1 is the wrong table to be looking at.

[red]Edit [/red]The above is based on ASME B31.3-2014.

 

[MJCronin]

Anyone who has a broken "Caps Lock" key will forget to say please and thank you..... IMHO

MJCronin
Sr. Process Engineer

 

[MHR1990]

Thank you for your prompt reply TGS4