Tagged: reliability engineering

Food Grade Lubricants

Food_grade

Q: What are the classifications for Food grade lubricants?

If you’ve ever dealt with food grade lubricants in the past, you would have noticed that not all food grade lubricants are made to the same standard. When we think about it from a manufacturing standpoint, we can understand the need for varying specifications.

For instance, in a facility there are components that will come into contact directly with the food while there are others that will never make contact with the product being produced for consumption. As with all specifications, the prices of the lubricants created for regular non-food grade usage will differ from those that are specifically designed for food grade usage.

NSF Standards

NSF International is the body responsible for protecting and improving global human health. They also facilitate the development of public health standards and provide certifications that help protect food, water, consumer products and the environment.

Here are the different specifications for each of the food grades (used in most countries)1:

NSF H1 – General or Incidental Contact

NSF H2 – General – no contact

NSF H3 – Soluble oils

NSF HX-1 – Ingredients for use in H1 lubricants (incidental contact) [usually additives]

NSF HX-2 – Ingredients for use in H2 lubricants (no contact) [usually additives]

NSF HX-3 – Ingredients for use in H3 lubricants (soluble contact) [usually additives]

 

Usually using a NSF certified lubricant goes hand in hand with an HACCP based food safety program (Hazard Analysis and Critical Control Points).

 

Here's a bit more info on the Categories and where they should be used3:

  • H1 - food grade lubricants used in food processing environments where there is a possibility of incidental contact.
  • H2 - non-food grade lubricants used on equipment and machine parts where there is no possibility of contact
  • H3 - food grade lubricants which are edible oils used to prevent rust on hooks trolleys and similar equipment.

 

ISO standards

There are ISO standards that govern food safety. These are;

ISO 22000 – developed to certify food safety systems of companies in the food chain that process or manufacture animal products, products with long shelf life and other food ingredients such as additives, vitamins and biocultures2.

ISO 21469 – specifies the hygiene requirements for the formulation, manufacture and use of lubricants that may come into contact with products during manufacturing2.

 

 References:

  1. Quick Reference Guide to Categories, NSF USDA. https://info.nsf.org/USDA/categories.html#H1
  2. International Regulations for Food Grade Lubricants. Richard Beercheck. Lubes N Greases Europe- Middle East-Africa. June 2014. https://d2evkimvhatqav.cloudfront.net/documents/nfc_int_regulations_food_grade_lubricants.pdf?mtime=20200420102000&focal=none
  3. Chemistry and the Technology of Lubricants Third Edition by Roy M. Mortier, Malcom F. Fox, Stefan T. Orszuilk (Editors), Chapter 8 Industrial Lubricants, C. Kajdas et al. Springer Dordrecht Heidelberg London New York. DOI 10.1023/b105569

Flender Specs

Flender

Q: Why should I use a Flender spec oil?

A lot of users ask about the need to use a Flender approved lubricant for their equipment! For a gear oil to be Flender approved1 in one of its units, the oil must be of CLP* quality according to DIN 51517-3 and motor oils must meet and ACEA Classification E2, API CF/SF. Additionally, it must meet the minimum requirements as per their specified “Proofs of performance / minimum requirements table” where the lubricants are tested at approved laboratories.

*CLP (according to DIN 51517-3)2 refers to an oil that contains additives which protect from corrosion, oxidation and wear in the mixed friction zone.

The manufacturer must also guarantee performance of the lubricant both for new oil and used oil up to a permissible range as per the following:

  1. Mineral oils (API I & II and ester oils) shall be 10,000 operating hours (2 years max)
  2. Mineral (API III) and Synthetic (PAO & PAG) oils shall operate for 20,000 operating hours (4 years max)
  3. All oil must produce the minimum requirements with an average operating temperature of 80°C

The following are a list of tests required by Flender which must produce specified minimum results:

  1. FZG Scuffing test in accordance with DIN ISO 14635-1 (A/8.3/90)
  2. FE8 rolling bearing test in accordance with DIN 51819-3 (D-7, 5/80-80)
  3. FVA micropitting test FV A 54 VII
  4. Flender oil Foam test in accordance with ISO 12152
  5. Compatibility with internal coating
  6. Compatibility with outer coating
  7. Filterability test FFT 7300 Rev.3
  8. Compatibility with liquid sealing component

Flender specifies the viscosity in the series to be tested for the minimum requirements.1

 

The Flender approval process ensures that the lubricant being used has been tested and can withstand some degree of micropitting, scuffing, foaming and is compatible with the surfaces in which it comes into contact. Thus, this makes the Flender approved lubricant more desirable for systems which place emphasis on the compatibility of all materials in the equipment (such as elastomers, paints etc). In conclusion, if you do have a Flender gearbox or equipment, it would be wise to use the Flender approved lubricant as they have gone the extra mile to ensure that the lubricant can protect your equipment.

 

Users can access a listing of approved Flender lubricants here: https://www.flender.com/en/lubricants

 

References:

  1. Specification for the gear oil approval for FLENDER Gear units (AS 7300) link
  2. Trends in Industrial Gear Oils by Jean Van Rensselar (STLE, Tribology & Lubrication Technology Magazine February, 2013) link

My MLE Journey

My MLE Journey

Ever since the MLE (Machinery Lubrication Engineer) exam was launched in April 2019, I was intrigued by it! It provided a certification where the dynamic duo of reliability and asset managers could be combined and infused with elements of lubrication and oil analysis. The perfect combination! However, since its launch, there have only been a couple of public sittings where the exam has bene conducted. Unfortunately for me, this would have required me to travel to the US for at least a week and run my business remotely. Every session that was announced directly clashed with my schedule and it was almost impossible for me to attend a session that didn’t clash with my crazy schedule.

Enter the C-19 pandemic that we’ve been facing that began in March 2020 (for us in Trinidad when our borders were closed). This pandemic caused (some much needed) downtime for all of us and helped to revolutionize the industry by allowing advancements in technology to finally be accepted. During the downtime, I decided to start studying for the MLE Exam with 5th Order Industry LLC. What a surprise, I had in store for me! After starting the course, I realized, I knew nothing about lubrication in the past! It was a definite eye opener and made me aware of the number of elements that I took for granted during my entire lubrication career.

Michael Holloway CRL, LLA (I,II), MLT (I,II), MLA (I,II, III), OMA, CLS, MLE was a great teacher and offered me assistance in all the areas in which I was unclear. He was also extremely responsive to all of questions at weird hours of the day when I got the time to study for the exam. His guidance was paramount to me achieving the MLE certification! The flexibility of On Demand modules allowed me to learn at my own pace and ensure that I understood each area before moving on to the next. The unique style of the delivery of the class really ensured that I benefitted from the bulk of the information provided as it allowed me to apply the knowledge in real life practical situations.

what_is_MLE

What exactly is the MLE?

The MLE exam was launched in April, 2019 along with the ICML 55.1 standard. Part 1 of the ICML 55 standard speaks to Asset Management, requirements for Optimized Lubrication of Mechanical Physical Assets. The MLE was mapped to this ICML 55.1 standard. This allows personnel within organizations who are studying for this exam to become more prepared for eventually attaining the ISO 55001 certification for their organization. The ICML 55.1 standard was drafted using the ISO 55001 as a guide however the 55.1 standard fills the gap with specific requirements and guidelines to establish, implement, maintain and improve consistent lubrication management systems and activities.

 

The MLE Body of Knowledge consists of 24 areas of knowledge and can be found here in greater detail. Additionally, the well documented Domain of knowledge is also accessible here.

The 24 areas for the BoK include:

  1. Asset Management, ISO 55001 & ICML 55; Basic Elements (3%)
  2. Machine Reliability; Basic Elements (5%)
  3. Machine Maintenance; Basic Elements (5%)
  4. Condition-based Maintenance; Basic Elements (5%)
  5. Tribology, Friction, Wear and Lubrication Fundamentals; Basic Elements (5%)
  6. Lubricant Formulation for Machine Types to achieve Optimum Reliability, Energy Consumption, Safety and Environmental Protection; Basic Elements (5%)
  7. Job and Task Based Skills / Training related to Lubrication and Reliability by User Organizations (4%)
  8. Lubrication Support Facilities needed in Plants and Work Sites (3%)
  9. Risk Management for Lubricated Machines; Basic Elements (4%)
  10. Optimum Machine Modifications and Features Needed to Achieve and Sustain Reliability Goals (5%)
  11. Lubricant Selection for Optimum Reliability, Safety, Energy Consumption and Environmental Protection based on Machine Type and Application (4%)
  12. Lubrication related Planning, Scheduling and Work Processing (4%)
  13. Periodic Lubrication Maintenance Tasks (4%)
  14. Inspection of Lubricated Machines for Optimum Reliability, Safety, Environmental Protection and Condition Monitoring (5%)
  15. Lubricant Analysis and Condition Monitoring for Optimum Reliability Objectives (8%)
  16. Fault/Failure Troubleshooting, Root Cause Analysis (RCA) and Remediation (5%)
  17. Supplier Compliance / Alignment and Procurement of Services and Products (3%)
  18. Waste and Used Lubricant Management and Environmental Compliance (3%)
  19. Energy Conservation and Environmental Protection (3%)
  20. Health and Safety (3%)
  21. Oil Reclamation, Decontamination, De-varnishing & Additive Reconstruction (3%)
  22. Lubrication during Standby, Storage and Commissioning (2%)
  23. Program Metrics (5%)
  24. Continuous Improvement (4%)
Candidate_req

Candidate requirements

As per ICML, candidates require at least 5 years education (post-secondary) or On-the-Job training in one or more of the following fields: Engineering, Mechanical Maintenance, Maintenance Trades, Lubrication, Oil Analysis and / or Condition Monitoring (Mechanical Machinery).

There are no prerequisites of an Engineering Degree or prior ICML certifications to attain the MLE certification. However, there are overlaps in the BoKs for the MLA & MLT exams that would prove useful in preparing for the MLE exam.

exam_scheduling

Scheduling the Exam

Once I completed the course from 5th Order Industry, I was awarded my Certificate of Completion which stated that I had achieved the required 40 hours of preparation for the exam. Looking back on it now, I spent a lot more than 40 hours preparing for the exam! In addition to completing the courses online, I started reading documents, manuals and books all outlined in the Domain of Knowledge (mentioned above).

In essence, it took me approximately 3 and a half months to fully prepare for this exam! It’s such a lengthy time span since I was studying at my own pace which the On Demand modules allowed me to do and I wanted to make certain that I was ready! After completing the online courses, it took me an additional week to schedule my exam as I had to make sure that there would be no urgent order of business during my 4 hour isolation and that I had reviewed at least 5 times the material covered!

To schedule the exam, one has to go to the ICML site. Then choose the mode of delivery (I chose Online of course and not Paper based). The site then allows you to choose the exam that you are applying for while giving you the guidelines that are specific to the exam type chosen (Online or Paper Based). For the Online sessions, they allow the candidates to verify whether their computer meets the requirements by clicking on some links provided.

After the exam type is selected, the candidate is moved to another page where they are required to provide some confirmations and upload their training certificate from one of the approved training providers. After submitting this information, the candidate is then directed to another page to fill out their profile information and make payment. An email will be received with the receipt from ICML. Afterwards, you will receive another email from Examity providing a link to fill out your profile and schedule your exam.

Exam_day

Exam day

The MLE exam spans a duration of 4 hours. These can pass in the blink of an eye in the exam room! For the exam, be sure to login at least 15 minutes before the scheduled time of your exam. Bring along a form of National Identification (ensure that the expiry date is on the same side as your picture). In my case, my National ID card has my picture on one side and all the details on the other side. The Proctor had to ask me for another form of ID and since my Passport had expired (the renewal date passed during the Quarantine Period!), I had to use my Driver’s permit which was upstairs! It took a bit of shuffling around (frantically, I’ll say!) but the Proctor was able to use my Driver’s permit after I retrieved it.

The desk area must be clean with no additional items. The only items on my desk were my 2 forms of ID. The Proctor will ask to view the entire room and ensure that all doors are closed. There is no need to walk with a calculator as one will be available in the virtual exam room on the screen as well as other tools that may be required. For this exam, you just need to walk with your brain, selection skills and your virtual knowledge base! The exam allows candidates to flag questions that they are unsure about and come back to them at a later time (which was absolutely terrific for me)!

first_mle

The Results

After completing the exam, the candidate has to inform the Procter that they have finished and then submit their answers. Thereafter begins the dreaded wait for the results! To my surprise, I got these results in two days after completing the exam! I can tell you, there was a lot of hesitation before opening that email! The email contained the results (yes I did pass! Yay!) and the score for each of the 24 sections of the exam.

At the time of writing this article, I am the first MLE in the entire Caribbean (I had to check twice to make sure)! I would highly recommend the MLE exam for lubrication professionals who want to challenge themselves and personnel within the reliability and asset management sectors who have a passion for lubrication. It is a wonderful exam and the knowledge that it will expose you to will be phenomenal!

 

Check out this article where our feedback was published by ICML!

That “w”!

w_oil

What does the “w” stand for in multigrade oils?

The “w” stands for winter.

Let’s go back a bit. We weren’t always as advanced in lubricant technology as we are today. For instance, if we left an ice tray filled with water on the table, what would happen? It would remain in that state of water. Now, if we placed that in the freezer, the water would turn into ice.

Similarly, before we advanced lubrication technology, there was one oil to be used for the Summer and one for the Winter. During the summer, the temperatures were higher and during the winter the temperatures were lower.

The “w” helps us to understand that this is the measurement related to how an oil flows at a cold temperature (or on start-up). It does not mean that you can only use an oil with a “w” in countries that experience winter!

The lower the number is in front of the “w”, the faster the oil flows on start-up. When we start our cars on a morning, all of the oil is at the bottom of the sump. It will take some time before the oil gets from the bottom to the top of the engine.

However, all of the parts in the engine are moving before they get the oil. Thus, it is critical to get the oil to them in the shortest time possible. The lower the number in front of the “w”, the faster the oil takes to get to the top of the engine (this will reduce the amount of wear that occurs).

Quick Tip: Zero (0) does not mean that there is no protection on start up, it means that it will get to the components faster than all the other grades (like a 0w20).

 

What about the number after the “w”?

This is the number that represents the viscosity of the oil at operating temperature. When the engine begins operating this is the viscosity that flows through all of the lines and components continuously. As we mentioned in an earlier post, the value has decreased in recent times (some going as low as 0w16!) due to the lines being thinner, which is ideal for lower viscosities.

5 Habits of an Extraordinary Reliability Engineer – My review

Peter Horsburgh has essentially captured the 5 Habits of an Extraordinary Reliability Engineer in his book! His style of writing appeals to engineers as he keeps the content directly on point and provides case studies to each of his chapters. Most engineers aren’t big readers (except for manuals and when absolutely necessary) but the conversational tone in which Peter explains some of his revelations about the industry ideally captures the attention of reader. I couldn’t put the book down once I started reading it!

What I really love about this book is that it was holistically designed for engineers. The book is small allowing persons to carry it around anywhere and it isn’t too thick to daunt the reader into thinking that they need to allocate a couple of days to reading it. Peter has kept the chapters short, driving the various points home and has even provided summaries for each section of the book. This makes it super easy when trying to relate to an issue that he has discussed. Peter has also done an excellent job with the illustrations in the book to keep the reader’s attention and provide for some light amusement to keep the book as a guide that engineers want to return to time and time again

Additionally, an extra step was taken to ensure that the book has some durability built into it. The pages aren’t the ordinary soft paper, rather the pages have a bit of a card stock finish. This was my first light bulb moment after opening the book (there were tonnes more light bulb moments while reading it!). Obviously the pages had to be durable! This book was meant to be in the workshop with the engineers becoming part of their manuals! I can clearly see engineers rushing back to this book during the course of the day to get back to a particular chapter or case study that can assist them in some issue of the day.

I definitely enjoyed this book! Peter first introduces the reader to the 5 Don’ts of Reliability Engineering. I hadn’t realized until then that the “Don’ts” that were covered form critical parts of any Reliability Engineers’ day! The manner in which he introduces these stood out for me, as he brought in case studies to demonstrate instances where he dealt with some of these “Don’ts” or even performed them himself. It is with these case studies that I appreciated that some of the situations that I face daily may receive a “Don’t” when it shouldn’t. With Peter’s story telling ability, he was able to truly relate to the readers the practical examples of things that should and shouldn’t be done. Unlike other books, he demonstrates the impacts (and throws some financials in there as well, which helps us to actually quantify what we’re looking at) of particular “Don’ts”.

Right after the “Don’ts” section, he launches into the “5 Habits” which are each covered in their own Chapters. While he explains the habits in this section, he then further dedicates each Habit to a Section (not just a Chapter) where he mixes in his real life experiences as his Case Studies while providing introductory information on the habits and their impacts on the plant and its reliability. Quite skilfully, afterwards he dedicates a Section to “Applying the habits”. This is in keeping with the conciseness of the book!  

I would highly recommend that all Reliability Engineers add this book to their library! It’s a book that gets all the lightbulbs blinking in your head from the moment that you begin reading it. However, it is not a book to be read just once, it needs to form part of your routine (either weekly or monthly). After reading this book, I can almost guarantee that the week that you spend in work afterwards will be nothing short of interesting as you may find yourself thinking… “Peter covered this in his book…let me just look back and verify if this can be dealt with in another way”. That being said, I believe that any engineer will make it part of their “consultation” guide especially during brainstorming sessions. It was indeed a pleasure reading this book! 

Check out his website for more info on getting this amazing book! https://www.reliabilityextranet.com/