Check applied pump nozzle forces and moments against API 610 (12th ed.) Table 5 allowables by flange size and orientation
Understand why nozzle loads matter, how API 610 Table 5 is organized, and how full acceptance is done per Annex F
API 610 (12th ed.) Table 5 tabulates the maximum nozzle loads a compliant pump must accept:
This tool performs the per-nozzle Table 5 screen only. It is fast, conservative, and ideal for early piping layout and stress-check kickoff.
Exceeding Table 5 here does not automatically disqualify the pump — it flags that an Annex F assessment is required.
API 610 nozzle loads are the external forces and moments that connected piping imposes on a pump's suction and discharge nozzles. API 610 (12th ed.) Table 5 lists the allowable force (Fx, Fy, Fz) and moment (Mx, My, Mz) for each flange size and nozzle orientation (top, side, end). Per Table 5 NOTE 2, each tabulated value is a ± allowable, so the load may act in either direction up to that magnitude.
Excessive piping loads distort the pump casing, which springs the shaft out of alignment and overloads the seal and bearings. The result is short seal life, premature bearing failure, internal rubbing, and lost efficiency. Limiting nozzle loads to API 610 Table 5 keeps casing distortion and coupling misalignment within tolerances the pump was qualified for.
Table 5 is a per-nozzle screen. Full multi-nozzle qualification is performed per API 610 Annex F, which evaluates the combined loads on both nozzles plus pump and baseplate displacements. Annex F can conditionally permit loads up to twice the Table 5 values when those displacements are checked and shown acceptable. This calculator only performs the single-nozzle Table 5 screen — exceeding it does not automatically disqualify the pump, but it flags that an Annex F assessment is required.