Your Reliability Engineering Professional Development Site
A listing in reverse chronological order of these article series:
Life cycle costing (LCC) is a way of analysing equipment purchase choices. If the analysis is done right and all factors are addressed, and the information is good, you would select the item that cost the least amount to own (buy and use) over its working life. This piece of equipment when compared to other suitable items would perform its lifetime service at least total cost to the organisation. [Read more…]
A few months back, I wrote a blog resulting from a conversation I had with a group of Maintenance Technicians who were attending the International Maintenance Conference (IMC) in 2011. While the group was enjoying the conference and learning some new things, the general consensus was that they felt they would not be able to apply the tools and techniques they were learning because “management will say they support reliability, but when it comes right down to it, talk is cheap.”
Properly designed o-ring grooves and properly installed o-rings stop the passage of pressurised liquids or gasses. Flexibility while being deformed under pressure is their greatest sealing advantage. O-Ring Design and Materials O-rings are made of elastomeric materials such as rubbers and plastics. They deform under pressure and then return back to their original shape once the pressure is removed. They also accept the movement of mirror-finish shafts while deformed by pressure. Usually they are shaped like a rubber elastic band of round cross section, but they can have rectangular, trapezoid and even ‘+’ shapes depending on the application. The material, internal diameter (ID) and cross section diameter specify o-rings of round cross section. [Read more…]
One of our customers who is thinking about setting up a RCM Blitz™ Facilitator training class recently asked me if I had a list of traits that all good RCM facilitators seem to have? He also wanted to know the background experience a good facilitator would have and what are some the qualities we should look for in selecting these people?
As I was about to tell him I could e-mail a document I had created on how to select a good RCM Facilitator, an interesting thought came to mind.
Are you really looking for someone to become a good facilitator or would you really like them a great facilitator? [Read more…]
A cooling water tower (CWT) is used to remove heat from incoming hot water and reduce it to a lower temperature. It does that by evaporating off some of the hot water. The evaporated water takes away the heat. Exactly the same process occurs when your body sweets to keep you cool. You cool off even faster if there is a breeze blowing. [Read more…]
20 years ago, I began my first assignment as a Reliability Engineer at Eastman Kodak’s Photo Chemical facility in Rochester, New York. Now, I understand that I just lost several people who began reading this article by using the words “photo” and “chemical” in the same sentence, but 20 years ago, most photography was still a chemical process. [Read more…]
Safety showers and eyewash stations are installed when dangerous goods are present. The shower installation has to meet recognised standards like American National Standard Z385.1. This article notes the key requirements for safety shower installations and discusses some practical issues. [Read more…]
One of the most common mistakes I see at plants and manufacturing facilities around the world is centered on the lack of a good lubrication program. For whatever reason, the task of lubricating equipment in most companies has been traditionally viewed as menial but necessary and delegated to low skill level employees with little or no training in lubrication best practices. It is this type of thinking that results in the unexpected failure of rotating equipment, including, pumps, motors, gearboxes, and bearings. Worse yet are the companies that have no lubrication program at all and somehow believe that someone in the plant will lubricate the equipment when it needs it. Just leave a few grease guns and some oil drums around the site and people will know when to add some. [Read more…]
Static electricity is the build-up of opposite polarity (positive and negative) electrical charges on two different substances in contact by the movement of one surface across the other. The spark that can occur from static build-up is the result of the opposite charges neutralising themselves when the electrical field between them becomes strong enough to overcome the gap resistance. [Read more…]
Accounting decisions can greatly affect maintenance costs. Two examples are the decision to purchase items as maintenance or capital and plant item asset numbering.
Maintenance costs are expensed in the financial year incurred and are claimed as a tax deduction at the company tax rate (soon 30% in Australia) in the year they are spent. Capital expenditure, on the other hand, is depreciated and can only be claimed as a tax deduction over the usable life of the equipment. Depending on the industry, the depreciation rate for industrial equipment is 20% per year. It can be as little as 2.5% per year for office buildings. There is a clear tax advantage to claim as much expenditure as possible as a maintenance cost and not a capital cost. [Read more…]
As companies around the globe look to improve equipment reliability, I can’t help but think of the Technicians and Craftspeople I meet after conference presentations. As they step up to introduce themselves to comment on the presentation, these attendees will often say, “I really liked your presentation, but I don’t think our management would ever support a program like this. What you are doing makes a lot of sense, but we just don’t have the people and our Operations Managers don’t understand maintenance and reliability.” [Read more…]
This article is a basic introduction to the mechanism of metal fatigue failure where parts break after a period of time in service. Explanations of accepted theories are provided and relevant design practices to reduce metal fatigue are presented and explained. [Read more…]
One of the best things about my job is from time to time I get to work with some younger people who have a passion for the Maintenance and Reliability business and have made the decision to pursue a career in this business. I really enjoy being a mentor, guiding the ambitious and offering advice on where to find information, articles and real, workable solutions. [Read more…]
So far in this series, we have had the opportunity to discuss the role of reliability engineering in today’s maintenance environments. In this final post of the series, I had the opportunity to ask Fred Schenkelberg some questions related to this very topic. Fred, with his years of experience, was able to provide some great insights to the role of reliability engineering, and what those in the maintenance department can do to improve reliability.
Even if you don’t have a reliability engineer in your organization, you can implement a few basic reliability engineering techniques to make a sustainable difference in your operation. [Read more…]
This article reviews the requirements for building and maintaining vertical, bulk liquid storage tanks. Issues, which affect the care of large storage tanks as well as common problems, are reviewed.
Bulk liquid tanks can be round, horizontal cylinders, vertical, cylindrical tanks and occasionally spherical vessels. We are concerned here with vertical tanks and vessels whose internal volumes are measured in tens of cubic meters through to hundreds of cubic meters. Examples are oil refinery storage tanks and process chemical storage tanks.
