Dear pipe_engbangalore,
Can u pl. eleborate on what you are trying to say by the statement"Pressure thrust is not that important for suction lines.The usually used EJ on suction line is the untied bellow".

I would like to know the technical reasons for you saying so.Also I would like to know what your views are on the pressure thrust loads on nozzles in case of untied bellows and the effect on pump foundation.Anywaything you say should be supported with solid technical justification.

Pl. also elaborate the statement" I feel expansion joint is better to use in place of springs(specially in such examples as suction piping of cooling tower pumps)in non hazardous fluids".This statement also requires a technical justification.

Regards