Shall we consider spring failure situation when evaluating nozzle load if the spring is close to nozzle.

It would not be normal practice to consider spring failure in a nozzle load evaluation or pipe stress analysis. It might be done for a highly critical or severe hazard situation.

Some engineering companies specify 'catch bars' .... an additional member integrated into a support design to limit free movement of the pipe in the event of spring failure.

Thanks! it is said that spring will easily fail if spring is close to pump nozzle due to vibration,Is it right?

Not an every day ordinary centrifgal pump.....


Springs supports around sensitive rotating equipment is quite the norm on thermally active piping systems what is unusual is that you don't seem to realize this?

It is common practice to put spring close to pump nozzle to reduce load.I was required to not put spring close to slurry pump nozzle in this mining project which I have less experience due to spring failure now. I feel confused.

Hi Joe,

What our colleagues are telling you above is that quality spring hangers do not fail due to vibration when they are installed near centrifugal pumps. If spring hangers fail near pumps it is far more likely that the wrong hanger was installed or that some environmental effect caused the failure. Generally speaking, for quality products, spring hangers are robust - they have a large design margin. Regrettably, I cannot claim that all the spring hanger products on the market can be described as "quality products".

If someone in your organization has opined to the contrary, based upon experience, I would certainly like to hear more about the circumstances surrounding the "spring hanger failure" and about the depth of the investigation that determined that "pump vibration" was the root cause.

Spring hangers are machines. All machines require maintenance. Corrosion and breakdown of lubrication can reduce the functional life of a spring hanger. It is important to specify the level of coating protection that is appropriate for the environment in which these devices will operate. Surveillance and proper maintenance are also essential.

Using spring hangers near pump nozzles is one of our "favorite tricks" for reducing the loadings transferred to the pumps from the piping.


Regards, John.