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BLEVE stands for Boiling Liquid Expanding Vapor Explosion
If a tank containing liquid is subjected to external fire, the heat from the fire lead to boiling of the liquid. This in turn leads to increased pressure in the tank. This “boiling” liquid and “expanding” vapor may increase the pressure significantly and cause the tank to rupture. If the released liquid is flammable , it can catch on fire resulting in a fire and explosion.
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Fatigue cracks that originate at inclusions. Stainless steel intergranular corrosion due to chromium carbide precipitates. Low steel toughness because martensite not tempered enough. Low aluminum strength because of excessive grain boundary precipitation. Orange peel due to large grains.
These are examples of how problems with a metal’s microstructure lead to reliability and performance problems. Of course, there are thousands of examples of microstructures that lead to good reliability and good performance.
One hurdle to understanding metallurgy is being able to think small – very small. Less than a millimeter. Less than a micron. And sometimes on the scale of atoms.
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Paul Gladieux has over 45 years of experience working in the quality profession. In 1991, he founded Global Quality Management Advisors (GQM Advisors). The group provides quality-related services focused on management system design, development, compliance, and certification in a wide range of sectors. His clients in the energy sector include companies such as: NuScale Power LLC, BWX Technologies, Westinghouse Nuclear AP1000 Program, Terra Power LLC, Worley Energy | Chemicals, U.S. Department of Energy, Westinghouse Nuclear, Vigor Industrials LLC, and Alyeska Pipeline Service Company.
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Welcome to Day 2 of the Maintenance Planning and Scheduling for World Class Reliability and Maintenance Performance 3-Day Training Course. I hope that you enjoyed Day 1 and found the maintenance and reliability concepts it contained useful.
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I know. I’m a lady. But it’s not my expression. That’s what my mentor, John Moubray, called it.
And he didn’t apologize for it when he used exactly that term during a one-on-one mentoring session with me.
And to this day, it’s one of the most valuable (and profitable) lessons he ever taught me.
In fact, it helped me win $1,428 in a poker tournament.
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Which of these six failure rate functions do your products and their service parts have? You don’t know? You don’t have field reliability lifetime data by product name or part serial number? That’s OK. Lifetime data are not required to estimate and classify failure-rate functions, including attrition and retirement. GAAP requires statistically sufficient field reliability data to classify failure rate functions for RCM.
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Production processes come to a grinding halt when equipment breaks down. This results in production delays, costs incurred to fix the machine, and opportunity costs. The production process cannot proceed until the maintenance activity on the faulty machine is complete — unless you have provisioned equipment redundancy. [Read more…]
Inherently safer philosophy represents a slightly different approach to risk mitigation. Instead of focusing on mitigating risks, an inherently safer alternative focuses on eliminating the hazards.Let us look at couple of inherently safer examples.
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Have you ever noticed how much emphasis is put on the maintenance budget in an industrial facility? While maintenance cost is usually just a fraction of what is spent on other costs like raw materials, energy costs and other input costs, it get 95% of the attention. This is because many think that every dollar spent on maintenance is a wasted dollar. With this attitude, it causes those at the plant level to make extremely difficult decisions of cost versus risk. The lower the budget, the more risk has to be taken.
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Use an Isocorrosion Diagrams To Recognise High Corrosion Situations And Design Process Equipment Accordingly. A true story of how a high nickel alloy (Alloy 28) reactor was holed in 8 weeks by sulphuric (sulfuric) acid running down the inside wall. When the situation was reviewed in detail using an iso-corrosion diagram for the alloy in sulphuric acid it was obvious that such a problem would occur. The iso-corrosion curves clearly showed the huge corrosion rates that would happen at local contact points within the reactor. A clear and detailed understanding of how to use iso-corrosion curves would have highlighted the problem at the design stage.
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Iterative software development approaches have been around since the 1950s but many mark the beginning of what is commonly thought of as Agile as the creation of the Agile Manifesto, a document written by a number of software engineers in 2001, which contains 12 principles that serve as guidelines to how software projects should be conducted. Since then, professional services and product organizations have taken Agile and bent and twisted it into proprietary commercial forms for their own gain.
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Maintenance, failures, design for reliability, use of RCM and predictive technologies explained in infographic. Leave some feedback so we can make it better.
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Because of their dependability and long effective lifespan, lithium ion rechargeable batteries are used in almost all modern electronic gadgets – cell phones, laptops, digital cameras, power tools, video games, PDA, household devices, e-bikes, security lighting, iPods, and automobiles. As the electronic market grows, it is evident that the lithium battery market will grow exponentially!
In rare cases, lithium batteries can catch fire – often in dramatic ways.
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In 1873, the superintendent of the Montreal Water Works signed out a manual for his organization:
“Rules and regulations for the employés [sic] in the department of the Montreal Water Works”
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An example of an automotive validation test reliability target is R97C50. In this case, the objective of the validation effort would be to demonstrate at one life on test, with 50% confidence, that the product has a reliability of 97% or better.
Does this mean that a field failure rate of 3% can be expected?
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