A pipe system is working at 800psig (30" pipe; 0.842" wallthickness) it should be considered to take into account Bourdon effect ? (it is a suction pipe of gas compressor).

How CaesarII takes into account this "presure effect" the Technical reference Manual have a little explanation; Somebody could indicate technical literature to help me to understand this subject?

For "bourdon", the user should read the "help text" for this option. Also note that "bourdon effects" are not addressed by the B31 piping codes. The CAESAR II implementation is as follows:

RESEARCH SHOWS THAT EX = (1/E) (SX - NU(SH + SR))

AS PER HARVEY, "THEORY AND DESIGN OF PRESSURE VESSELS", P. 61:

SX = P A^2/(B^2-A^2)
SR = P A^2(1-B^2/R^2)/(B^2-A^2)
SH = P A^2(1+B^2/R^2)/(B^2-A^2)

THEREFORE THE ABOVE EQUATION REDUCES TO:

EX = (1/E) (P A^2/(B^2-A^2) -
NU(P A^2(1+B^2/R^2)/(B^2-A^2) + P A^2(1-B^2/R^2)/(B^2-A^2)))

OR:

EX = (P A^2/(B^2-A^2) (1 - 2 NU)) / E

where EX is a strain introduced on the pipe element per unit length. In the above equations, "A" is the inside radius,"B" is the outside radius, "NU" is poissons ration, and "E" is the elastic modulus.

I'M so sorry,i don't have the book "THEORY AND DESIGN OF PRESSURE VESSELS"
what's the 'R'?could you explain it?thanks

"R" is the measurement of the radius where you are trying to caluclate the stress. Therefore "R" varies from "A" (the inside radius) to "B" (the outside radius).