Skip to main content

MaintenanceForums

Sorted by last update

Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
CSI 2130 vs CSI 2140
RM Registered Member
Registered Member thank you. recently we spoke with predictive service agency who use and sell emerson and we understood that emerson starting to speach about a new 21xx (2150?). I think it will be here soon in not many years. [ more ]
Registered Member The 2140 is 8 years old now. I talked to a Emerson rep not long ago and he indicated it will be several more year before we see a 2150. I started out with the 2120 upgraded to a 2130 then to a 2140. Most people I know have 2140's and like them. You can check with your local rep and see if they have a trade in deal going. [ more ]
See all 2 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Ratio of Planner?
RM Registered Member
Registered Member https://www.linkedin.com/pulse...ur-program-jonathan/ [ more ]
Registered Member In our case, planner positions are equivalent to those engineers (executive position) becasue planners should know the work sequence and schedule. It could be a higher position if it's occupied by seninor engineers who have had hands on maintenance. [ more ]
Registered Member What I was trying to say is the Maintenance Manager prefer candidates with a BS in Engineering than senior technicians to be hired as Maintenance Planners. Is more as a engineering entry level position, Maintenance Planners seems the first candidates to be internally promoted to Maintenance Engineers, Maintenance Supervisor, or Project Engineers competing against experienced Engineers from out the company. Planners salary are just a bit lower than Maintenance Engineers or Maintenance... [ more ]
See all 11 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Reliability Calculation (Weibull)
RM Registered Member
Registered Member Hi for everione [ more ]
Registered Member I intend to evaluate the reliability of the Station-keeping of the FPSO, it can be for 3DOF or 6DOF, it doesn't matter. The objective is heading optimization, mooring stability and DP optimization. I am basing myself on the treatment given by Sorensen (2011) \dot (x) = Cp(x,w) which implies switches for the different modes of operation of the Vessel, Cr determine the state space equations of the process, x is state vector and w is the environmental disturbance vector. I see station-keeping... [ more ]
Registered Member Hi R eliability Scholars , Hope you all doing well. I am new in the comunity. Did any of you worked on classical reliabity of an FPSO Station-keeping using Weibull distribution. The objective is to a sure the maitenance of the position and heading. If so, can you give tips on how you got a good review? I am defining Station-keeping as the set of turret, mooring and dynamic position (DP). I evaluate each of these subsystems, and then Rsk(T) = R(turret)xR(mooring)xR(DP). With regards Hlunguane J [ more ]
See all 26 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
High temperature at pump NDE bearing
RM Registered Member
Registered Member Thanks Venkatesh.V.. I already check the breather condition also [ more ]
Registered Member You can check breather condition also [ more ]
Registered Member Thanks Kishore, Temperature is increasing gradually. We have protection tripping logic has installed at Pump bearing temperature.. That's why we are monitoring closely. Do you think bearing housing imperfections may leads to high in temperature? [ more ]
See all 10 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Real Time Vibration Monitoring System
RM Registered Member
Registered Member For real-time and reliable monitoring of vibrations, offline analysis tools for validation and optimization cannot be trusted uppm. A real-time Torsional Vibration Analysis system must be implemented. It can offer you coordinated tools for vibration monitoring and analysis combined with process data in real-time. This system can monitor the individually adjustable frequency band monitoring, a self-learning module for monitoring frequency spectra, and the angular shaft motions. Integrating a... [ more ]
Registered Member Hi! We have similar system for monitoring vibration for 7 channels. [ more ]
Registered Member Hi Phil, I already used metrix, system 1&evo & alta solution 1250FE and i would recommend AS 1250FE if your budget is tight, this same as adre p408 or if you dont mind the cost just go to BHGE product or metrix setpoint. regards, [ more ]
See all 5 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Vibration Analysis of recip pump
RM Registered Member
Registered Member Reciprocating pumps and reciprocating compressors may cause severe pulsation and vibration in your assets, which could result in damages of supports, foundations and instruments. This may result in unstable process operation or malfunction of your assets. The pulsation and vibration analysis of reciprocating compressor/pump systems are required at the design stage to prevent such undesirable conditions. A Torsional Vibration Analysis system can help monitor and reduce the vibration at the... [ more ]
Registered Member A reciprocating pump is a pump that uses backward and forward movement to move fluid. In a reciprocating pump , a piston, plunger, or diaphragm moves backward and forward. A reciprocating pump is one in which the liquid follows the movement of a piston during suction and delivery strokes. Talking about vibration limit ISO-10816-6 may be applicable where vibration evaluation for hydraulic power generating and pumping equipment. Have you tried Polycab self-priming monoblock pump if not have a... [ more ]
Registered Member Hi, Vibration analysis is a tedious job. The below mentioned link help me to understand it better. Refer: https://rms-reliability.com/pr...on-analysis-service/ [ more ]
See all 3 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Lube oil analysis
RM Registered Member
Registered Member Lube oil analysis is crucial for the overall maintenance of machinery. However, the primary step of lube oil quality management is oil sampling . It is important to consider this aspect as 54% of machines usually fail due to poor lubrication. To ensure the smooth operation of your assets, it is imperative to first collect lube oil samples before forwarding them to your plant and have an oil filtration system in place. The main objectives of lube oil sampling are: Oil Flowing through... [ more ]
Registered Member Dear Ali, All information are valued especially while coming from experienced hands. I am also planning for mandatory inspection . cleaning of lube oil tank every 5 or six year ,But major hurdle is the access and confined space issues [ more ]
Registered Member Pre-filtering is a best practice. You'll need a setup for that which might be the main hurdle for most people to do the pre-filtration. This would be a necessity if the new oil is far away from the cleanliness level you target. Oil reservoirs are inspected where I work every time the oil is replaced. I'm talking about medium to large machines. Many times, the inspection reveales key findings like corrosion and pin holes. Maybe these are more common with steam turbines (most of my... [ more ]
See all 7 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
When should we change the Antifriction bearing on the basis of vibration analysis
RM Registered Member
Registered Member When managing your asset’s overall health, the condition of the machine’s bearings plays a crucial role. An issue with even a single bearing can cause the machine to break down, resulting in production loss and costly downtime. Carefully lubricated bearings can almost have an infinite life. Also, if the torsional vibration is not controlled or correctly measured, it can cause unplanned machine breakdowns. This is where Torsional Vibration Analysis for bearings comes in. This technology can... [ more ]
Registered Member Greetings Mr . M NADEEM ANJUM . You can monitor regular trend and analyze fault respective machine component frequencies . Typical acceleration data related to all types of bearings in general rotating equipment. (Exceptions = Diesel Engines & Rock Crushers.) EXCELLENT LEVELS = Usually .10 G or Less. No action required. GOOD LEVELS = Usually .35 G or Less. No action required unless noisy. FAIR LEVELS = Usually .50 G or Less. No action required unless noisy. (If you have no records... [ more ]
See all 2 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
HOW TO GET ESTIMATED VIBRATION OF CORRECTION WEIGHT IN BALANCING
RM Registered Member
Registered Member A long answer for a short question. If you are new to balancing, perhaps it is good to search about the vector method. I should mention, however, there are simplifications (or oversimplifications) in many of the articles, videos, etc compared to what you may face at the field/shop. Regards- Ali M. Al-Shurafa [ more ]
See 1 reply...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
How to measure Predictive Maintenance Effectivity in a plant
RM Registered Member
Registered Member Predictive maintenance solutions can be implemented in a plant to predict issues and asset machine breakdowns. This technology uses machine-learning and AI-powered solutions to gather historical data and predict which parts of an asset could fail and at what time. Advanced sensors are installed and technicians can have information about accurate data points, remotely. The collected data can then be analyzed by advanced analytical tools and predictive algorithms. With this information, the... [ more ]
See 1 reply...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Reverse precession orbit during coast down
RM Registered Member
Registered Member For the members in the forum to give meaningful comments, I guess you need to provide more details, otherwise you may receive general comments and guesses. My general comment and wild guess, this could be normal behavior. Regards- Ali M. Al-Shurafa [ more ]
Registered Member Thanks Mr. Shurafa for the response. Steady State forward precession is observed steadily, but coast-down forward and reverse precession 1X orbit 💫 observed intermittently. Even though Vibration amplitudes are well within the limit, I want to know why this behavior happens and what are all the possible reasons for this issue.. [ more ]
Registered Member I assume you implicitly ask if this reverse precession orbit is acceptable or not. Regards- Ali M. Al-Shurafa [ more ]
See all 3 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
[Discussion] Cavitation Repair on Pump Impeller
RM Registered Member
Registered Member Repair in case of emergency would be my philosophy If you apply anything to impeller, it is now out of balance. Unless the material your are applying is harder than base impeller material, it too will fail. What costs more, identify and fix the cavitation issue thru piping or liquid level changes or putting a bandage on a problem. In some cases, a change of materials of construction is needed, like from bronze to stainless. As you stated originally, you have a cavitation problem, seen by... [ more ]
See 1 reply...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
RCM Documentation
RM Registered Member
Registered Member Hi JC L., I started study RCM and read some documents about IRCMS, but I try to find the software but the links to the software isn´t working more. Is there one link to get the IRCMS software? I notice that all information about the software is out of date but I was interesting in know this software. Regards, Giuliano Luz [ more ]
Registered Member Another package is RCM++ from ReliaSoft this package incorporates Criticality Analyisis, Task Packaging, costs parameters and optimisation features and links to their other reliability tools. You can download a demo and a training guide from http://www.reliasoft.com BUT it is a big programme because of the high degree of customisation and features. They have work wide offices. Dave http://www.Ramsoftuk.com ReliaSoft partner [ more ]
Registered Member Can we easily do uploading into cmms? No standard tutorial? [ more ]
See all 18 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
VIBRATION LIMIT FOR CENTRIFUGAL COMPRESSOR
RM Registered Member
Registered Member API 617 would be helpful [ more ]
Registered Member Mohiuddin, There are many references that can be suggested to use but perhaps they are not useful for you; they may not be applicable. Your case can be for a factory test, site test, shop test, after an overhaul, collected by a routine handled analyzer, collected by an online system connected to a shutdown system, for a compressor whose bearings are anti friction type or journal bearing etc. Search for ISO and API standards on compressors and you may find some figures to start with. If you... [ more ]
See all 2 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Asset crticility and redundant system
RM Registered Member
Registered Member thank you @Registered Member For you replay [ more ]
Registered Member Hi Ahmad, Firstly, redundancy is not a maintenance strategy, it is an engineering/design strategy. I disagree with the explicit statement that "no need for condition monitoring for redundant system". Industry best practice would dictate that the decision on whether or not to conduct condition monitoring should be based from criticality of the equipment, regardless if it is spared or not. Your company should establish your risk matrix first similar to what you showed in slide 5, determine... [ more ]
See all 2 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Lubricant suggestion
RM Registered Member
Registered Member I suggest checking the axial location of the bearings seats. Mind! There always MUST be one bearing on the shaft which is axially free (allows for shaft axial expansion). Bearings do NOT have enough internal clearance to compensate for such expansion!! If this is problem you will always see strange spikes during load change (usually start-ups) [ more ]
Registered Member Greetings Mr. Vibration Expert, With the given data nothing can be concluded. give some vibration reports when normal load operation, How you noticed 10% amps dropped and minor maintenance carried out and what was the maintenance. When DE bearing increased to 60*C more what is the ambient temperature and what is actual temperature showing? What are the vibration readings when the temp rise was 60*C also what were the temperatures on Motor side. Motor DE/NDE and Blower side How many bearings,... [ more ]
See all 2 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Overhang Fan Vibration spectrum analysis
RM Registered Member
Registered Member On first view of the TWFs and FFT, it just smells like looseness and possible rubbing. But that is just a "fast I'm not sure" guess. You can put pieces of this puzzle together by providing more detail on the history of this fan....need lots of answers to what, wheres and whys - Were both fan bearings replaced? why did you replace them? and what condition did you find them in? are these pedestal type bearings? make/model? What was the condition of the shaft mating surface? Are you confident... [ more ]
Registered Member At first look I would say mechanical looseness [ more ]
Registered Member Motor power, rpm, measurement history, envelope.....? [ more ]
See all 3 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Mean time between failures MTBF for pumps
RM Registered Member
Registered Member Y7, Where I work, figures MTBF for pumps are reported on a monthly basis. A major challenge is to be consistent in your criteria. One of the very vital practices is to define the boundaries of a pump and make sure all involved employees follow the same definition. For example, which of these are/are not parts of a pump at your facility? 1. Shaft coupling 2. Instrumentations like shaft vibration probe, bearing temperature element, discharge pressure transmitter 3. Base, foundation, base plate... [ more ]
Registered Member Y7, I think your approach is right. You are just looking and calculating MTBF of pump only. If you want to take whole system which may include, pump, strainers, etc.. then you have to consider all the failures in that system. [ more ]
See all 2 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Standby Machinery Switchover Interval Study- PDF Report and Want Your View
RM Registered Member
Registered Member It is a good reference of best practices in changeover for spared equipment. It is important to consider factors like the type of service and risk associated with any disturbance during swapping. Some services like slurry or viscous fluid require extra care. For the pumps, I saw some site follow 75%, 25% scheme so pump A runs 3 months followed by one month by pump B as one cycle, this is to avoid simultaneous life related failure. This scheme was debated by Heinz Bloch in one papare giving... [ more ]
Registered Member Hello, Thank you gentlemen, please see the expanded edition attached here; with ten pages that now includes A,B,C and A,B,C,D configurations. Abdulrahman Alkhowaiter [ more ]
Registered Member 🙏
See all 4 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
STRAY GASSING phenomenon in power transformers oil
RM Registered Member
Registered Member Hi, Johan. Thanks for your help. I just want to correct my mistake: The transformer has a power of 400MVA and not 400kVA as I wrote earlier. [ more ]
Registered Member Morning Vyacheslav, I would suggesting finding out what is causing the gas generation, yes and I know its easier said than than done, because of the complexities of trying to "look inside" a transformer, I don't think you will be able to stop the gas generation unless the root cause is established, it however sounds like you need to "buy some time" until you get the opportunity to take it offline and inspect properly, if so, I can put you in contact with an industry expert with regards to... [ more ]
See all 2 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Machine testing after a massive explosion in Beirut
RM Registered Member
Registered Member Having 2000 tons in a area now for conflict is a problem some tried to get authorities to reconsider the protein all risk but nothing happened someone figure out what 2000 ton of a potential explosive could do with a little help risk recognition and protential harm are not recognized [ more ]
Registered Member I feel extremely heartbroken and tragic for what has occurred at the port. I wish the recuperation endeavors make it sooner than what individuals might suspect. Your inquiry is somewhat broad, along these lines, you may get general remarks. WE can use drones for the public safety it is a best machine learning programs Here are some websites who provides cloud programs for drones. https://www.measure.com/ https://droneshowsoftware.com/ https://flytnow.com/ and many more [ more ]
Registered Member Dear Ali, Thank you for your reply, we all hope a fast recovery so people can return back to their "normal" life. Concerning your reply, you're 100% correct and that step should be done prior to the rest of the tests. Some of the problems that I came across were misaligned and unbalanced rooftop cooling tower and ventilation fans, the explosion had deformed the thin fan cover and in one case the impeller had impacted the cover and blades were worn/cracked/broken. Thanks again for your... [ more ]
See all 4 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Cooler Fan Vibration analysis
RM Registered Member
Registered Member Thanks for Replay Mr. Kishor ji. [ more ]
Registered Member Dear Pathu , could you post your spectrum with peak frequency labeling , so that we could identify the root cause .Also mention motor running r.p.m . As per my point of you : 1.Check Belt pulley sheaves alignment & Tension . 2.Check Belt pulley sheaves V-grove profile ,which might leads belts to uneven wear and repeated failure along with increase in vibration trend . [ more ]
Registered Member Fan is overhung type [ more ]
See all 3 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
MTBF calculation
RM Registered Member
Registered Member I've some experience on these calculations and can say that different people use different "assumptions". When I pass my calculation to someone from another organization, questions and challenges are raised. So, my practice (that you are free to take or leave) is to state the assumptions when the MTBF figures are reported. For instance, what are the boundaries of the pump? Is the driver part of the pump? Is the coupling part of it? If the pump is noisy but producing the required pressure and... [ more ]
Registered Member Thanks jim and pathu. there are instances where mtbf is calculated as a group (indicative).but yes mtbf per equipment is way better. In the example above that i share is when you dictate or know precisely the operating hours but if you want to calculate them per month so i guess maybe this would be right (31days x 5equipment)- days of breakdown / no of breakdown right? It may give you big mtbf number [ more ]
Registered Member Calculation-wise, Pathu's answer if the correct one. See https://www.fiixsoftware.com/m...own%20eight%20times. You could "group" them per your example but I think you might lose perspective on the usefulness of the MTBF metric to assist in extending the MTBF of the machines. If they were all designed properly for the application, they all had the same lubrication schedule, they were all installed and maintained per manufacturer's specifications, they all were balanced and aligned to the same... [ more ]
See all 5 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
Difference between certification on reliability leader and maintenance manager
RM Registered Member
Registered Member Felix if you need more information let me know maura@reliabiliyweb.com and I will connect with you [ more ]
Registered Member Thank you Felix, Finding the right professional certification can be tricky with so many good choices. The Certified Reliability Leader is about a creating an empowered and engaged, cross-functional, reliability culture in your organization, even if you are currently the only Reliability Leader. The Certified Maintenance Manager is about the 18 skills one needs to be an effective business manager responsible for the Maintenance Department. They are both unique in the world and with a history... [ more ]
See all 2 replies...
Reliability Engineering for MaintenancePosts about Reliability Engineering for Maintenance
compressor amonia high vibration
RM Registered Member
Registered Member The first impression of the spectrum, it seems like you have a misalignment issue, you can confirm the case by knowing the phases of each side of the coupling. I can't quite understand the drawing you have there, but if you have a motor that's directly running the compressor, I'd suggest you measure the clearance of the bearings on both sides, if there's a big difference between the motor and compressor's input shaft then you'll also get a misalignment (indicated by high 1x,2x, and 3x, etc.)... [ more ]
Registered Member Can you mark your measurement points on the compressor picture? Do you have any history of measurements (trend, cascade)? Meanwhile I give a few notes about the motor side. Vibration level is raised but seems not critical. Levels are probably higher due to residual unbalance. At the NDE motor side you noticed harmonics of 100,3 Hz. You suspect BSF which could be the case but I more suspect the 2xLF which is something very common at NDE side of motors. Higher line resolution could give you... [ more ]
Registered Member Hi! Many thanks for reply. Now i collect more data, Please see the attach file. [ more ]
See all 5 replies...

Join Us!

The Association for Asset Management Professionals (AMP) is dedicated to making the world work for everyone, with no one left behind.

The mission is to provide a path to a safe, sustainable, successful workplace and world through reliability and asset management.

AMP is a Florida based 501 (C3) not-for-profit organization that delivers

  • Professional Certification (CRL and CMM)
  • Online Community of Knowledge
  • Competency Based Learning (CBL)
  • virtual Special Interest Groups (vSIG)


 This web site is FREE to use for registered members and has been called the LinkedIn or Facebook for Reliability Leaders and Asset Managers.  The Community of Knowledge is simply fantastic.

The Association of Asset Management Professionals (AMP) is licensed to develop competency based frameworks using Uptime Elements Reliability Framework and Asset Management System and its related Frameworks.

Uptime Elements Reliability Framework and Asset Management System
Uptime Elements Reliability Framework and Asset Management System

Uptime Elements Digitalization Framework
IoT Knowledge Domain

Vibration Elements
Vibration Analysis and Diagnostic Framework
Lubrication Elements
Asset Lubrication Framework

 You are also invited to join the Association of Asset Management Professionals

LinkedIn Discussion Group with 53.000+ members

https://www.linkedin.com/groups/1636387

LinkedIn Company Page as well
https://www.linkedin.com/company/association-of-asset-management-professionals

Join Now

Already a member? Sign In

Membership Required

We're sorry. You must be signed in to continue. Sign In or Register
×
Are you sure you want to remove from your Block List?
×
Loading...
×
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .
×
Link copied to your clipboard.
×