Piping (Pipe stress) flexibility check

Engineering-Stream - Software for Engineering Applications

Piping Flexibility Check per ASME B31.3

Minimum metal temperature expected during the displacement cycle under analysis, Tc    deg.F
Maximum metal temperature expected during the displacement cycle under analysis, Th    deg.F
Pipe Material
Stress value for material at temperature Tc from Table A-1, Sc    ksi
Stress value for material at temperature Th from Table A-1, Sh    ksi
Basic allowable stress at minimum metal temperature expected during the displacement cycle under analysis, (20 ksi maximum), Scb

   ksi
Basic allowable stress at maximum metal temperature expected during the displacement cycle under analysis, (20 ksi maximum), Shb

   ksi Stress range factor, f (commonly f = 1)
Allowable displacement stress range, SA    ksi
Reference modulus of elasticity at 70°F, (Carbon steels, C ≤ 0.3%), Ea    ksi
Factor, K1    (in/ft)^2
Pipe Nominal Size and Schedule
Selected Pipe Outside Diameter, Do    in
Projected lengths for computing displacement strains, ft x dir, Lx

   ft y dir, Ly
   ft z dir, Lz
   ft
Developed length of piping between anchors, L    ft
Anchor distance, straightline between anchors, U    ft
Linear thermal expansion going from 70°F to minimum metal temperature, Bc    in/100 ft
Linear thermal expansion going from 70°F to maximum metal temperature, Bh    in/100 ft
Resultant of total displacement strains, to be absorbed by the piping system based on Bc, yc

   in
Resultant of total displacement strains, to be absorbed by the piping system based on Bh, yh

   in
Calculated factor for the left hand side for case Bc, LHS_Fc    (in/ft)^2
Calculated factor for the left hand side for case Bh, LHS_Fh    (in/ft)^2
Design Verification1
Design Verification2
Design Verification3

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General Notes:

Note: Refer to the "Terms and Conditions" in the 'About' section before using the software.

1) Piping Flexibility Check is a software program that can be used to determine if a formal flexibility analysis of a piping system is required or not.

2) The procedure is based on ASME B31.3 Process Piping Code.

3) Design of Piping Systems by 'The M.W.Kellogg Company' is used as a reference as well.

4) Equations used :-
Applicable Condition: (D*y)/(L - U)^2 <= K1 ; K1 = 30 * SA / Ea ;

5) Materials used, need to be Group 1 Carbon and Low alloy steels with carbon content, C ≤ 0.3%, as listed under
the ASME B31.3 Code.

6) The piping system shall be of uniform size, has no more than two points of fixation, no intermediate restraints,
and falls within the limitations of empirical equation given in line (4) above

7) The user should be aware of the limitations on using this procedure as indicated in the code.

8) The Program is based on ASME B31.3 Code - 2016 Ed.

9) If you notice any error, please let us know, so that can be rectified.

10) Contact us with any comments / questions : engineeringstream11@gmail.com

11) Visit us for more software programs at https://engineering-stream.com