API 610 11th, Rotor Balancing Test of Overhung Type Pump

3 comments

Rate

Anonymous Poster #1	API 610 11th, Rotor Balancing Test of Overhung Type Pump 04/23/2013 7:18 AM
	Hello, I need some help... There is a requirement that asking for Rotor balancing test for all type of pumps as per the client spec. But in the code API 610 11th phrase 6.9.4.1 says that shafts are not required to be balanced. Just in case of BB1 and BB2 rotor balancing can be applicable. I'm hard to understand why OH type is not applicable for Rotor balancing test.... Could you explain why? Thank you!
	Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

These comments received enough positive votes to make them "good answers".

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

SHOCKHISCAN Guru Join Date: Nov 2007 Location: Eastern Arizona mountains on Route 666 about a mile from God's country Posts: 1676 Good Answers: 122	#1 Re: API 610 11th, Rotor Balancing Test of Overhung Type Pump 04/23/2013 10:44 AM
	The company I work for uses pretty much every type and design of pump available in the market as we are into oil, gas, energy, mining, fertilizer, and utility production. We use overhung pumps in an extreme number of applications all of which require that the pump impeller and shaft as an assembled, stable unit are balanced. We do not balance the shaft separate from the impeller as to do so would be counterproductive. Balance accuracy of a pump shaft is dependent on the interaction and reaction of each individual component with the other pump shaft components which dictates that all components must be assembled before balancing. It is my understanding the PAI 610 6.9.4.1 is referring only to the balancing of a shaft when it is not part of the pump shaft assembly as to do so is unnecessary, time consuming, non-productive wasted effort. __________________ They said; "Brain size?" I heard; "Train size?" so I said: "I'll take a small one, thank you."
	Reply Good Answer (Score 5)

No more Good Answers. Go to first "Almost" Good Answer

Baffled Power-User Join Date: May 2010 Posts: 132 Good Answers: 6	#2 Re: API 610 11th, Rotor Balancing Test of Overhung Type Pump 04/23/2013 11:27 PM
	If it is as per the specification, then it is something that your firm has contracted to. Unless you can negotiate a waiver or it is prohibited by code the you had best get on with it.
	Reply Score 1 for Good Answer

pritam Guru Join Date: Aug 2008 Location: City of destiny, INDIA Posts: 775 Good Answers: 67	#3 Re: API 610 11th, Rotor Balancing Test of Overhung Type Pump 04/26/2013 12:07 AM
	Dear Unanimous Poster, Requirement is Rotor balancing and not the shaft only. Code is right (shafts are not required to be balanced) and your client is also right (rotors to be balanced). Rotor constitutes shaft+Impeller, which needs to be balanced.
	Reply

These comments received enough positive votes to make them "good answers".

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

Copy to Clipboard

Baffled (1); pritam (1); SHOCKHISCAN (1)

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (96 right now) Show Members