I have API 610 pump with 14"x12" nozzles for max design op. P=2.41mpa. both suction and discharge are from/to underground of 24" piping, pump house and pump (Total weight 1457.6kN)are just sitting on a pad with friction co-efficience of 0.5. Piping is designed with two 14"/12" victaulic couplings connecting to nozzles and redicers to robber hose (24") on both lines.

Since too much thrust forces on rubber hose, no anchor is in between rubber and victaulic, this force will be eventually transferred to the nozzle and make nozzle load much higher than axial load requested by Table 4 of API 610.

Any practical solutions are greatly appreciated.

Thanks,

Flames

Further to my previous post, I did quick calculation as below:
24" rubber hose elogation pressure force is 625KN, Forces will be acting to pump casing is Fsuct.=206KN, Fdis.=168.6KN. Nozzle loads on the flange will be Fnsuct.=419KN, Fndis=456.4KN.

Both suction and dischage line elogation pressure thrust (24" rubber hose) will move the pump house, coz Ftotal+1.41*P*A>Pump house weight times 0.5.

I modelled victaulic coupling and rubber hose with expansion joint by specifying effective ID (meaning pressure thrust included), but the output result is much less than the above hand calculation but still much more than API 610 table 4.

Your expertise on this is really appreciated.

Thanks again,

Flames