Hello together,

I could not find any hint, whether SIF values have to be set for HP Piping with not listed components from licensor.

Due to the great wall thicknesses I see no danger for the fittings and first FE evaluations show bending and torsion SIFs < 1.

But the result gives an axial SIF about ~2.7

Is it OBLIGATORY to determine SIFs for all components and use them in calculations acc. B31.3 Cahpter IX ? Or is it just conservative "CAN BE USED" option ? Any comments or recommendations ?

Best Regards Peter N.