Dear friends,

I need your kind suggestion on the piping with slip joint analysis. Right now i am doing a ballast piping inside the tank with slip joint i.e. dresser coupling built in to absorb the expansion due to piping thermal expansion and ship hull deflection as well, i have done the slip joint input based on CAESAR Applications Guide, the details as follows.

The pipe side is DN600 mm.

As per the guide, K2=(100)N/(a) where,
N=24"
expansion coefficient =13E-6, with 100 ft pipe length, a=24*100/(13E-6*100*12)
Hence, K2=1.5E+5 N/cm
Typical values Fy=400*24=9600 lbs.in equal to 1085 N.m
K1 just assumed with value 1000

However, the analysed results is same with the piping without this slip joint.

Thanks in advance for anybody giving a solution.

Best regards,
Wang