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Design Code for pumps_for stress analysis(piping)

Design Code for pumps_for stress analysis(piping)

Design Code for pumps_for stress analysis(piping)

(OP)
Hey guys

I am working on stress analysis for pipelines and i need information on one of the pumps on site ,Gorman Rupp type 06B3-B type… For that I need to find allowable nozzle end loads as per design code used on these pumps. I cannot seem to get through to the technical guys at Gorman Rupp or local agents. Is there anyone who knows or who can point me in the right direction?

RE: Design Code for pumps_for stress analysis(piping)

WRC Bulletin No 449
http://www.forengineers.org/store.php?crn=65&r...
Guidelines for the Design and Installation of Pump Piping Systems by Vincent A. Carucci and James C. Payne - February 2000. Library of Congress Card Catalog: 85-647116 (48 pages)

RE: Design Code for pumps_for stress analysis(piping)

Typical of the pump industry. If you want them to provide acceptable nozzle loadings you can only get them before you place an order. After the order is placed the pump supplier will generally answer that the piping should be suitably designed as not to place any loads or moments on the nozzles. It is called risk mitigation. "Never give a sucker an even break" comes to mind.

Gormann Rupp pumps are invariably cast iron bodied and I can understand a reluctance to allow any nozzle loadings.

“The beautiful thing about learning is that no one can take it away from you.”
---B.B. King
http://waterhammer.hopout.com.au/

RE: Design Code for pumps_for stress analysis(piping)

I would recommend NO load on the inlet / out flanges for this pump. Ensure that all pipes are correctly supported and any axial thrusts are not transmitted into the pump casing.

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: Design Code for pumps_for stress analysis(piping)

If the manufacturere really expect no nozzle loads, they should specify that it must never be connected to anything.

RE: Design Code for pumps_for stress analysis(piping)

C2it;
Well at least not to anything that will impose a load.
I note your listed as petroleum - a completely different world to cast iron selfpriming contractor type pumps.

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: Design Code for pumps_for stress analysis(piping)

Artisi,

Actually I am a pipe stress engineer (chartered mechanical engineer) working mostly in petrochem, but also nuclear.

If someone has a workable solution to zero nozzle loads on any equipment with connected pipe in fluid service, I would be very pleased to know about it. It would make us both instant milloinaires.

Cheers.

RE: Design Code for pumps_for stress analysis(piping)

C2it,

It really is a different world in the water and wastewater & mining industries. Designing in the petrochem industry is a breeze compared to these industries. You have the luxury of precise standards and competent designers, manufacturers and contractors. I wont even speak of the building services industry. You rarely have to deal with plastic or cast iron materials.

I too work as a piping stressman and waterhammer speciailist but across all industries. Trying to get engineers to understand the need for dynamic analysis to determine loads on equipment is "pearls before swine" territory outside of petrochem/oil & gas. They dont understand what they dont know!

It comes down to the consequences of the risk. It is cheaper to put in that extra support, repair the failure etc than engineer it as we do for petrochem projects.

“The beautiful thing about learning is that no one can take it away from you.”
---B.B. King
http://waterhammer.hopout.com.au/

RE: Design Code for pumps_for stress analysis(piping)

LSThill, I fail to see any relevance to your posts.

If it ain't broke, don't fix it. If it's not safe ... make it that way.

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