Sponsored by the Association for Maintenance Professionals Join or Manage Your Profile Posting Boards Machinery Condition Monitoring and Predictive Maintenance Posts About vibration/alignment/balance 10816-3: 1998 - Standard
Join or Manage Your Profile Posting Boards Machinery Condition Monitoring and Predictive Maintenance Posts About vibration/alignment/balance 10816-3: 1998 - Standard|
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Dear All;
Does any one of us is having the Details of 10816-3: 1998, Please share it A Question ! Is it mandatory to follow ISO standards for Condition monitoring ? Explore your Knowledge |
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Some of my own take on ISO standards: they are a minimum set of standards and/or guidelines to meet or exceed.
Cordially, Sam |
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Regarding groups of machines in ISO 10816-3 . Group 1 is electrical machines with shaft height greater than 315 mm. What is meant by shaft height? Is it height of the motor shaft above ground or above motor base? Any answers?
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I don't have those ISO standards, but I would guess that shaft height is height of shaft centerline above the bottom of the motor feet.
That distance is a common feature in specifying motors. For example NEMA frame size designation tells you that dimension (shaft centerline to bottom of feet). For medium NEMA frame motors, the first two digits are the height in inches times four. For example 445T has height 44/4 = 11". For smaller motors with two digit frame sizes it is factor of 16. |
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Dear All;
Whether the write up on the ISO 10816 is available with any one of us. Explore your Knowledge |
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Prabhu
The Details of 10816-3: 1998,is available if you pay for it check this out http://www.iso.org/iso/ Or else click the find button above and type in ISO Standard, similar questions have been asked before |
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WHAT YOU SAID ABOUT MOTOR SHAFT HEIGHT IS VALID FOR HORIZONTAL MOTORS ?WHAT ABOUT VERTICAL MOTORS? REGARDS. |
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10816-3 states for vertical applications "The shaft height of a machine without feet, or a machine with raised feet, or any vertical machine, is to be taken as the shaft
height of a machine in the same basic frame, but of the horizontal shaft foot-mounting type. When the frame is unknown, half of the machine diameter should be used." As some have suggested, you should purchase the spec if you are going to use it within your facility. There is extensive information within the spec that you should be aware of for properly utilization. John from PA |
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JOHN,
One more question regarding ISO 10816-3. It treats pumps and electrical machinery separately. Pumps , in most cases have electric motors as prime movers. Should we group such m/c into two categories, one for pump criterion and other for motor criterion or how to choose group for combined motor and pump? Regards. PS- We are trying for ISO 10816. right now , it is not available with us. |
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AKHTAR, not certain what you are referring to. Perhaps that below, which distinguishes between "integrated" and "separate" driver?
Group 3: Pumps with multivane impeller and with separate driver (centrifugal, mixed flow or axial flow) with rated power above 15 kW. Machines of this group may have sleeve or rolling element bearings. Group 4: Pumps with multivane impeller and with integrated driver (centrifugal, mixed flow and axial flow) with rated power above 15 kW. Machines of this group mostly may have sleeve or rolling element bearings. Beyond that stated above, see the attachment. The spec is 18 pages long. You really need to get a copy. John from PA Group_3___4_pumps.pdf (88 Kb, 45 downloads) |
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=============================================== Suppose, there is an electric motor with shaft height between 160 and 315 mm. So it comes in group 2. The motor is coupled to a pump above 15 KW. So the pump belongs to class 3. To which category will the complete assembly of pump and motor belong- class2 or class 3? That is my question. Regards. |
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There isn't anything intended by these specifications that is hard and fast. Within your plant you could separately apply group 2 to the pump and group 3 to the motor, or take the more stringent of the two levels and apply it to both. That might be modified over time as you learn about the coupled machines and any unique characteristics that might modifed the settings. For example, some pumps, depending on their service (off the curve for instance) are just naturally rough running. Motors tend to be relatively smooth running.
John from PA This message has been edited. Last edited by: John from PA, |
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It's good that people start to talk about standards in this forum.
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Thank you for the Josh- " Enthusiastic in Hindi language" 2) Also I came across API 670 standards for machinery protection ? What it deals with / try to emphasis ? Explore your Knowledge |
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API 670 is primarily an instrumentation specifcation. See Scope from API 670 below...
John from PA "This standard covers the minimum requirements for a machinery protection system measuring radial shaft vibration, casing vibration, shaft axial position, shaft rotational speed, piston rod drop, phase reference, overspeed, and critical machinery temperatures (such as bearing metal and motor windings). It covers requirements for hardware transducer and monitor systems), installation, documentation, and testing." |
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Mr.John;
Thanks Say for an Example Centrifugal compressor; Motor- 475Kw, Journal Bearings; RPM- 1440 Fluid Coupling - I/P - 1440 RPM, O/P - 11,000 Compressor RPM- 11000, What hardware requirement you will suggest for Monitoring Shaft Vibration: Bearing temperature ,( Winding, Bearings) Others if any Explore your Knowledge |
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Groups 3 and 4 will be removed from part 3 shortly, because ISO 10816-7 is in the final draft and deals with pumps.
Regards, Bill Bill.Foiles@bp.com |
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Prabhu, I suggest you get yourself a copy of API 670.
John from PA |
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