Page 246 - Failure Analysis Case Studies II

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37 tubing
. .. . . . . _.. coil axis
.
.
\

Tubing: Outside diameter, do = 9.5 mm
Inside diameter, di = 6.3 mm
Stainless steel type 3 16
Coil: Coil diameter, D = 80 mm
Number of turns, N = 2
Axial Coil Stiffness, K, = G(do4-di4)/(8D3N)
Transverse Coil Stiffness, K, = EI/(nDN:)
where G = modulus of rigidity; I = 2nd moment of area of the tubing x-section,
E = modulus of elasticity.

Flange: Flange diameter, df = 100 mmm
Connection size = 112, 1 inch
Carbon steel
Fig. 8. Schematic of the FE model and parameters