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maximum load for pump nozzle

maximum load for pump nozzle

maximum load for pump nozzle

i have the case, doing the pipe stress which the pipe connect to the pump nozzle.
The nozzle size is 600 mm, which is larger than table on API 610 for force / moment at the pump nozzle (maximum on the API 610 is 16")
i try to have the vendor data but still on progressing
Is there any typical data for the maximum load for pump nozzle which the size is 600 mm (suction) and 500 mm (discharge)


RE: maximum load for pump nozzle

What did the API-610 pump vendor tell you when you asked him about it ?

You are not trying to use some ancient, beat-up old pump, are you ?

Sr. Process Engineer

RE: maximum load for pump nozzle

Any reputable manufacturer will publish allowable nozzle loads for every pump that they manufacture.

Go back to your vendor and ask for a copy of the chart that they publish.

RE: maximum load for pump nozzle

We can do an approx calculation of the max allowed nozzle force & moment if the flange to the pump centerline / mounting feet dimension is available and the material of the casing is available. What is the pump casing material? And what type of pump is it?

RE: maximum load for pump nozzle

It really depends on the pump mounting style, centreline mounted pumps have a greater load bearing capacity than an end-suction foot mounted configuration, whereas a footmounted horizontal split case pump is capable of higher flange loads.
Can we assume you are talking about end suction top centreline foot mounted pump, if yes - you should be designing for the absolute minimum flange loading - for me this is zero load, especially on the inlet side.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: maximum load for pump nozzle

No typical data that is worth using as this is very vendor dependant.

If you want to try something use the 16" data

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: maximum load for pump nozzle

If the vendor doesn't have any info the best you can do is minimize it and try to get it within "normal" allowed loads for a nozzle of that size.

Generally speaking, if the pipe stress at the nozzle location is < 5,000 to 6,000 psig or < 10% the allowable the stress, the nozzle is probably okay.

RE: maximum load for pump nozzle

If the vendor doesn't have any info on the allowable nozzle loads for one of their own products, I would recommend finding a different vendor.

I worked with distributors for major pump manufacturers for over 25 years, and this information should take three clicks of a mouse for their applications people to access.

RE: maximum load for pump nozzle

The alternative is to artificially "anchor the flanges" as virtual anchors only in the stress program, then increase the flexibility of the pipe until you only have a very, very small load at the anchors.

--Einstein gave the same test to students every year. When asked why he would do something like that, "Because the answers had changed."

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