Archive | Preventive Maintenance

2265

11:00 pm
July 1, 2014
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The 2013 NAME Award Winner: Redefining Excellence at Emergent BioSolutions

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The Lansing, MI-based maker of the anthrax vaccine BioThrax tells how careful refinements of its already sophisticated maintenance operation brought them the coveted win.


By Rick Carter, Executive Editor

References to “customer service” are frequent at the Lansing, MI, campus of Emergent BioSolutions (EBS), Inc., winner of the 2013 NAME (North American Maintenance Excellence) Award. Maintenance and facilities services team members mention it often when discussing how they serve their many internal customers in operations, production and research. Some 400 employees work at this site, which is a portion of the Biodefense division of publicly held EBS, headquartered in Rockville, MD. Most of these employees depend on the maintenance and facilities team to ensure the site’s complex operations run smoothly. Importantly, EBS/Lansing also pursues a seemingly high-risk business strategy where good customer service takes on elevated value: The division has only one primary external customer—the U.S. government—for whom it makes only one product: BioThrax, an injectable vaccine that protects against anthrax disease (see sidebar). It also happens that BioThrax is the only such anthrax vaccine licensed by the FDA, making it—and its manufacturing operation—unique in the world.

Master plan

EBS Lansing’s 12.5-acre campus in a semi-rural area northwest of Michigan’s capital city is situated on the state’s former Department of Public Health site. It still includes buildings that date from the 1930s when the state itself produced vaccines for residents through the Michigan Biologic Products Institute (MBPI). EBS bought MBPI through a public auction in 1998 (under its then-name BioPort Corporation) and has since introduced many updates inside the now-fenced-and razor-wired perimeter. These include new buildings, expanded manufacturing space (completed and in the process of qualification) and, most important, a plan to capitalize on a situation whereby every drop of product the plant makes is virtually guaranteed to be purchased.

“With the [state] facility came the people, the process, the equipment and all the intellectual property,” says Dino Muzzin, Vice President, Engineering, Facilities & Supply Chain. “The main product at that time was and still is BioThrax, the only FDA-licensed anthrax vaccine. That was the number-one asset that was interesting to BioPort at the time.”

The Lansing facility now produces up to 9 million half-milliliter liquid doses of BioThrax per year, all of which are purchased by the U.S. Department of Health and Human Services (HHS) and distributed to locations around the country for inclusion in the Strategic National Stockpile of medical countermeasures. To meet its commitment to the government, the company follows a somewhat circuitous manufacturing and distribution procedure. Newly made product is held on-site in large vessels until a desired quantity is reached. The vessels are then shipped off-site, where the vaccine is transferred to individual 10-dose (0.5 ml.) vials, which are then returned to Lansing for visual inspection, labeling, QA and pick-up by HHS. “We don’t know where the final product goes,” says Muzzin. He does know it’s used to fulfill the U.S. government stockpile goal of 75 million doses. BioThrax is indicated for the active immunization of adults who are at high risk of exposure to anthrax. A four-year shelf life means that a certain portion of product is regularly expiring and in need of replacement.

With such enormous demands on a biopharmaceutical manufacturing procedure that cannot be rushed, an ongoing goal at EBS Lansing is to expand product output through other means. “When I started 10 years ago,” says Muzzin, “we made around 2 to 3 million doses per year.” A key reason output is now almost five times that amount “is our maintenance and facilities team,” he says. “When I joined, our systems were not reliable or dependable. The time and energy and the systems this crew has put into this operation have helped ensure that we have a reliable infrastructure. We’ve taken our deviations down very low, to the point where we’re a well-oiled machine. It wasn’t always like that.”

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A process and purification vessel, used in the second step of BioThrax manufacturing.

A look in the mirror

Muzzin’s distinction contrasts the NAME-award-winning facility of today with one that, due to the nature of the product, was always a good operation but had room to improve. This was made clear in 2006 when the Lansing site first applied for the NAME, but was not considered for contention.

“We really thought we could win it that time,” says Barry Quinn, Specialist, Facilities Services, and point-person for both the 2006 and 2013 entries. “But this is when we found that the real value of the NAME Award is the application. Going through it is a learning process. It asks so many questions you should be asking anyway, but nobody has thought to write down.”

Because of stringent FDA operating requirements, obvious maintenance strengths at the site included its PM program. “The FDA requires that if your equipment is not PM’d on schedule, you shut down production; it has to be tagged out,” says Steve Iadicola, General Maintenance Manager (Electrical/HVAC/Building Controls). “So for our critical equipment, the PMs are 100% and they always will be or else we shut down. Even back in 2006, the PMs were strong.”

Also, the fact that the company routinely operated with a high level of oversight meant that its systems and operations underwent various iterations and refinements over the years. These were and continue to be driven by the U.S. Food and Drug Administration (FDA) regulations, lean manufacturing and other continuous-improvement initiatives, and additional government oversight. “We go through numerous audits throughout the year from the FDA, CDC, USDA and others,” says Mike Vitello, Senior Manager, Facilities Services. “So we’re used to answering questions and going in front of panels.”

Nonetheless, some of EBS’ pre-award maintenance and manufacturing environment will sound familiar. “This was previously a very top-down organization,” says Iadicola. “It was pretty much, ‘You do this because this is how it’s written.’” Jack Zimmer, General Maintenance Manager (General Construction), agrees that “we pigeon-holed our talent.” Plumbers worked only on pipe work, he says, and steamfitters were only assigned steam-related work.

Other areas that fell short of world-class were planning & scheduling and internal communications, both of which were focus areas for the 2013 win. But Quinn says the main reason EBS missed a NAME win in 2006 was the lack of buy-in from all phases of the Lansing operation. “A maintenance professional can’t answer that entire questionnaire,” he says. “But for the 2013 submission, the reporting structure was different, so direction came from a vice president who was in charge of every person who needed to participate and we did very well getting buy-in.”

Barry Quinn and Mike Vitello with the coveted NAME Award.

Barry Quinn and Mike Vitello with the coveted NAME Award.

New job descriptions

The learning curve that EBS followed in 2006 and eventually led to the 2013 NAME win featured several key strategy implementations. “Since 2006, we’ve looked more formally at reliability and predictive maintenance to get ahead,” says Iadicola. “That’s where you see what was the nearly 2% equipment loss [downtime] rate drop to less than 1% first, and is now trending at less than one-half percent. It’s because we’re thinking ahead of the equipment, and we are thinking more aggressively about pairing maintenance work with normal operation breaks to try not to have an extra gap in the production schedule.”

This was accomplished in part through the team’s efforts to replace the silo approach to job responsibilities with new levels of empowerment and cross-training. “Our carpenters now do backflow preventer maintenance, and have gone to school for their certification,” says Zimmer. “And we have steamfitters who are doing plumbing.”

Jobs are also viewed more holistically, says Iadicola, an example of which is how work is performed on the operation’s autoclaves (high-pressure-steam-based sterilizers). “There are multiple things we can do at one time on these units,” he says. “We might pair up an electrician who has controls background with a steam mechanic who understands the operation of the unit. This way, instead of the technician thinking he’s only maintaining a component on this equipment, it’s clear to him that he’s maintaining all of this equipment. And there is great efficiency in having both people working on it in real time as opposed to one person doing his work, then handing it off to another.”

A change in job descriptions—with a focus on detailed, system-specific information—also helped. “We wrote specific tasks with regard to how our system functions,” says Ben Ehnis, Manager, Facilities Resource Planning. “This allowed us to create a repeatable process. And once your process is repeatable you can build flow through it and use it to make additional enhancements.” The written, detailed descriptions aided both new workers and those who filled in for absent workers. “This is where the cross-training really comes together and starts to close gaps,” says Ehnis. “But [the descriptions] are a living document,” he adds. “Any one of us can redline something and bring it back to the group for consensus.”

Iadicola praises the effort for “dipping deeper into the quality level” of EBS maintenance and facilities team members and, in the process, raising the bar for expectations. “We’re tapping into their talents,” he says. “We still have the quality requirements, but our technicians are stepping up and not only improving their skills but understanding our business better and what’s important. In the sixyears I’ve been here, the operator and technician input at this greater level is at the core of the changes we’ve made, and we’re stronger because of it.”

Tighter planning and scheduling

With cross-training and job descriptions continually expanding, the group could tighten its approach to planning and scheduling. The traditional view that planners should have a certain amount of backlog and plan a week or more in advance “is a good practice where it fits,” says Ehnis. “But on a site like this where we sell out everything we make and have maximum operational capacity running at all times—and any squandered time is a squandered opportunity—we learned that this process didn’t fit our [internal] customers’ expectations.” The uniqueness of the Lansing manufacturing process, adds Iadicola, means special issues “will always arise. Everything here is custom or a standard piece of equipment that we use in a custom way.”

To better support the production efforts that are “very focused on product throughput,” says Ehnis, “we knocked our planning and scheduling window down from a week or more to three days”—a significant time reduction that caught the eye of the 2013 NAME auditors. It was accomplished with the help of the flexibility they could tap regarding technicians’ abilities, as well as the improvements they made to communication channels. An important factor is that while the Lansing site produces only a single product, its 12-acre campus houses numerous operations—manufacturing and related operations, product formulation and storage, research laboratories, filled-vial quality assurance, shipping and office functions—in service to this product. Coupled with the omnipresent FDA oversight, the mix poses a significant challenge to site-wide maintenance coordination.

“Manufacturing is our number-one customer,” says Ehnis, “but we have three buildings that perform some type of manufacturing at any given time, and we have other buildings that support those activities. We meet with the teams from those three manufacturing buildings every week to talk about the requests they have and to work those schedules out.”

Ehnis emphasizes that the meetings are two-way, with each side giving and getting. “They are not held with the idea that we’re here to do what anybody asks. We have very candid discussions. As much as we’re ready to admit we have room to improve, we will provide feedback, too. We’ll tell them what the data shows and that they need to do XYZ to help us keep this equipment functional. As a site, we have embarked on an accountability initiative to have more direct, focused feedback. This builds credibility with operators and other customers. When you’re partnering with them, you’ve earned their trust and are able to get candid feedback, especially when you can show through data that this is not just perception. It’s more about ‘How can we help?’ or ‘How can we change this procedure?’”

As for the reduced work window, Ehnis says the three-day format has not only improved customer expectations, it has reduced stress on his planners. “They’re not having to touch the same thing two or three times and schedule something a week or two in advance when we know something is going to change,” he says. “That was a win for both sides.” Similarly, he says, the team’s internal customers “don’t have to wait a week or two to get something lined up that’s important. The planners love it because it’s that much quicker for the cycle time to get something of high importance on the schedule, accomplish it and move on.”

Today, Ehnis’ team works weekly with production planning to blend routine maintenance and calibration activities with requests from production or support for a continuous-improvement project. “Those are the things we needed to respond to more realistically” he says, “and it allowed us to customize our model. So even though [what we do] doesn’t necessarily align with industry best practices from a textbook or training seminar, our biggest takeaway in getting this award is that you can’t be afraid to study the data you’re getting and take it in the direction that’s right for your organization. You have to know your organization well enough to understand what the needs are and focus on meeting those needs, then address the next issues that come up. That’s how you’re going to achieve operational excellence.”

Alignment

Shaping a maintenance program to match an operation’s specific needs doesn’t happen overnight. It can be especially taxing when dealing with old equipment, which the Lansing team has done for some time.

“We’re talking about 30-year-old equipment,” says Mark Bartlett, Production Support Supervisor, Facilities Services. “Bioreactors [which generate the biologically active vaccine], holding tanks, the pipe racks themselves, pumps, HVAC systems that cool the jackets, it’s all integrated,” he says, and all subject to review and requalification when changes are made. But the team has long understood that maintenance of EBS’ critical equipment is preferred over outright replacement, the approval and recertification process for which is measured in years.

Bartlett faced the aging-equipment issue recently when he received a call from a vendor that supports the company’s fermentors (where essential microorganisms are grown). He was told the units were too old to receive further support. “So we had a ‘Save the Fermentors’ project where we identified all the parts we needed to buy and keep in stock.”

Ehnis says parts issues like this and others are “where some of our continuous-improvement initiatives come in. If Mark’s team identifies something going bad that we can’t find, and we’ve had these issues, then we get innovative in our solution. We’ll pull in the cross-functional team and say, ‘Here’s what we had, here’s what we think we need.’ You get buy-in and approval, go out and find what you need, bring that in, then go through a commissioning qualification and ultimate implementation and stock that for the future.” It’s not always that easy, recalls Bartlett, but the approach has worked.

A necessary aspect of old-equipment upkeep is having ample spares on hand, and EBS’ multi-million-dollar spare-parts inventory is no exception. “The NAME auditors questioned it,” says Bartlett, so he reminded them not only of the need for the parts, but of their cost. “They’re phenomenally expensive,” he says, “because many are specialty parts made of 316 Grade stainless or silicone or another costly material that’s required because it involves product contact. Basically everything we buy is five times more expensive than what you would pay for any other piece of equipment in normal manufacturing.”

The next milestone

The new EBS Lansing manufacturing building currently undergoing scale-up procedures will potentially triple the company’s Biothrax output. It will also relieve some of the pressure to maintain the site’s aging equipment. Still, the facilities and maintenance team members recognize that their ability to not only successfully maintain this site’s older equipment, but allow it to boost output has sharpened their skills—another demonstrable fact that impressed NAME auditors.

“The NAME auditors didn’t believe some of the things we told them,” says Vitello. “They asked if we really scheduled so tightly and if we had shutdowns going to 15-minute intervals on certain tasks, and they challenged this.” But when the auditors saw it for themselves, they were swayed. They were also impressed by the site’s embrace of a 5S program Bartlett introduced at EBS when he arrived in 2011. A recognized 5S subject-matter expert, Bartlett “created the system and a core team that monitors it and keeps feedback,” he says. Begun in maintenance, it has spread through production, the laboratories and now into the offices. Bartlett says he looks forward to when it will be totally absorbed by the EBS culture because “it’s the only system that is made to become obsolete.”

Asked what might come next for a NAME winner, the Lansing team is unanimous in its belief that the award is only one of many milestones they can achieve. “The first thing I thought after we got the award was, how do we stay at this level?” Vitello recalls. “We are working to keep that high level of performance by continuing to do what we’ve identified as factors for success and constantly finding ways to further improve.”

Ehnis and others see Lansing emerging as one of the top industry manufacturing facilities, especially when the new manufacturing capacity goes on line and allows the facility to take on new product lines. “I think we already are” at the top, says Ehnis, but acknowledges the value of sharing what the company has learned from the NAME win with other company sectors. “We’re very aware of our role as the sole provider to the U.S. government of the only FDA-licensed anthrax vaccine. But the way you make yourself be the truly indispensible site is to be better than everybody else.”

NAME point person Barry Quinn likely speaks for the entire Lansing team when he says his post-award plan is “to do everything I can to make sure we keep this site productive.” He also admits to having a selfish reason. “This is a great place to work,” he says, “and I want to continue working right here. I hope someday my son will, too.” MT

Anthrax vs. BioThrax

Anthrax is an infectious, usually fatal disease caused by the bacterium Bacillus anthracis, which occurs naturally in soil throughout the world. Infection occurs when the spores enter the body through a cut, abrasion or open sore or by ingestion or inhalation. Once inside the body, anthrax spores germinate into bacteria that then multiply and secrete non-toxic proteins that can become lethal if allowed to combine within the cells of the exposed human or animal.

Inhalational anthrax is the most lethal form of anthrax. Anthrax spores are small (2-6 microns in diameter) and easily aerosolized, which makes this the most likely form to be used in an anthrax bioterrorism attack. In the post-9/11 world, anthrax has gained notoriety in the U.S. and around the world. It was in the news last month when up to 86 workers were believed to have been accidentally exposed to it at the Centers for Disease Control and Prevention in Atlanta, GA. News stories indicated that the workers were given antibiotics. They may also have been inoculated with BioThrax, the anthrax vaccine produced by Emergent BioSolutions (EBS) at its Lansing, MI, campus. No infections at CDC were reported.

BioThrax is the only FDA-licensed anthrax vaccine, and is indicated for the active immunization of disease caused by Bacillus anthracis in persons aged 18 through 65 whose occupation or other activities place them at high risk of exposure. According to EBS, BioThrax is undergoing tests that may also make it valuable for post-exposure use. The vaccine is stockpiled by the U.S. government, and is routinely administered to members of the U.S. military deployed to high-threat areas.

For more information, visit biothrax.com.

4153

1:24 am
June 20, 2014
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Save Cooling Tower Energy with These 10 Easy Maintenance Tips

Gravity Water

Did you know that some simple cooling tower maintenance could help your facility save up to 15% on its electricity costs? Routine preventive maintenance also can help conserve water and extend the operating life of your cooling equipment.

Over time, the leaving-water temperature of a neglected cooling tower will rise, as will the energy costs to operate the equipment. (For every 2-degree F increase in temperature, those energy costs can increase by up to 6%.) A well-maintained cooling tower, however, will continue to function at its original optimum efficiency, keeping energy costs low.

To get the most from your cooling equipment, heed these maintenance tips:

#1. Check overall cooling and listen for any uncommon noises in the system to establish a baseline of possible issues.

#2. Before beginning any hands-on work, be sure to follow proper lock-out/tag-out procedures and disconnect motor switches to protect your safety and that of other personnel.

#3. To keep the system free of potentially problematic materials, inspect and clean debris from strainers.

#4. To avoid a build up of scale and increase capacity, inspect the water-distribution system and check for dry areas over the fill-coil section. If the surface isn’t fully wetted, check the nozzles for cracks and clogs.

#5. To ensure desired water filtration and prevent dirt from collecting in the system, flush dirt and debris from the cold-water basin through the tower drain or sump strainer. Basin-sweeper piping installed in addition to a filtration system will function as automatic maintenance.

#6. To conserve water and reduce air entrainment, be sure the make-up water supply is at the appropriate, pre-determined level.

#7. To prevent accumulation of solids in recirculating water, adjust the bleed rate according to your local water-quality and evaporation-rate regulations.

#8. To ensure optimal performance on a belt-driven system, fix any tension problems with the belt.

#9. To assure reliable service in a gear-driven system, routinely check for and maintain, correct oil level, oil quality and shaft alignment, per the manufacturer’s’ recommendations.

#10. Lubricate fan shaft bearings every three months, at a minimum. Consider installing automatic bearing greasers to eliminate monthly bearing maintenance.

When all is said and done

Keep in mind that maintenance frequencies will vary depending on the condition of the circulating water and the environment in which the cooling equipment runs. Among other things, it’s also important to remember that storing critical parts in inventory is a good strategy for reducing unplanned downtime. Consult your local equipment supplier regarding additional strategies.

The bottom line is this: As with other systems in a plant, good maintenance habits will go a long way in preventing failures and extending the life of your cooling equipment.


Information in this article was provided by Baltimore Aircoil Company, a leader in the design and manufacture of evaporative-cooling and heat-transfer equipment.

3082

3:58 am
June 9, 2014
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Compact-Footprint, Refrigerated Dryers for Rotary Compressors Offer Simplified Maintenance

Kaeser Compressors has released a new line of refrigerated dryers for use with rotary compressors up to 40 hp. The Kryosec TAH-TCH series can handle flows from 12 – 159 cfm. Incorporating copper-brazed stainless steel plate heat exchangers, they provide drying at ambient temperatures up to 122 F.

The units’ air-to-air and air-to-refrigerant heat exchangers are combined with the condensate separator in a single assembly to save on space and weight. According to the manufacturer these new units have an exceptionally compact footprint and, with their low profile, easily fit under machine platforms and in tight corners. They can also be wall-mountedKryosec_5x4_cmyk_tcm9-539226.

Other features include an Eco-Drain electronic demand drain for dependable condensate drainage without pressure loss and a hot gas bypass valve that adjusts cooling capacity to match varying conditions. With all components, including heat exchangers, refrigerant circuit, condensate separator and drain, easily accessible when the side panels are removed, maintenance is simplified.

2189

4:55 pm
June 3, 2014
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Honeywell Launches New Range of SmartLine Temperature Transmitters

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Honeywell Process Solutions has launched a new range of SmartLine industrial temperature transmitters aimed at improving overall plant and personnel efficiency, even in harsh, noisy process environments. Part of the company’s SmartLine field-instrument portfolio, these products incorporate a number of efficiency-enhancing features, including advanced displays capable of showing process data in graphical formats and communicating messages from the control room.

According to the manufacturer, whether they measure temperature or pressure, all of its SmartLine transmitters feature modular components that simplify field repairs and reduce required repair-parts inventories.

With the intuitive diagnostics of both transmitter and sensor, information is available on the transmitter display to provide a real-time view of the sensor health. Built-in dual-input and digital output options minimize the number of instruments needed for monitoring and switching needs.

Honeywell’s Smart Connection Suite control-system integration delivers transmitter messaging, maintenance-mode indication and tamper alerts that improve field time to repair and control-room communication and help avoid unit trips.

 

2535

5:43 pm
May 28, 2014
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Rejuvenation Process Gives New Life to Aging Industrial Power Cables

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According to Novinium, its environmentally friendly Sustained Pressure Rejuvenation (SPR) technology can restore aging power cables to like-new performance for significantly less than it would cost to replace them. Cable rejuvenation involves the injection of a healing and upgrading fluid into the strands of medium-voltage power cable to repair and extend its life. In the SPR process, as the non-flammable rejuvenation fluid migrates into the conductor shield and insulation, it modifies the insulation’s chemistry.

For a 300 ft.-long, 3-phase cable segment, one crew using hand-carried equipment can typically complete the SPR procedure in approximately four hours, including sealing the six cable ends, injecting the fluid and installing new termination kits. Sites can expect the dielectric strength of their treated power cables to increase immediately and exceed 400 volts/mil within seven days.

Novinium notes that circuit owners have rejuvenated 140 million feet of medium-voltage cables over the past 25 years, and that less than 1% of the this equipment subsequently failed in service. The company offers a 40-year money-back warranty against failures on cables treated with its SPR process.

1128

3:23 pm
May 28, 2014
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Vibration-Monitoring Solutions In the Field

Two examples of how vibration monitoring saved time and money in heavy industrial settings.

New portable and online-monitoring systems help extend the value of vibration monitoring into the heaviest of industrial operations. Here’s a look at how users avoided serious motor failure in mining and detected a critical bearing failure in paper-pulp production by using the right vibration products at the right moment.

Case study #1:

A Phosphate mine is garnering big returns by monitoring numerous pieces of processing equipment with online solutions from Ludeca, Inc. The mills use several low-cost VIBNODE online systems. The VIBNODE is a comprehensive entry-level online monitoring system that allows the end-user to access customized spectrums and time waveforms from a remote location. The system will notify the end-user via email or text message when the vibration level exceeds an alarm band.

The new monitoring system has helped the mine’s vibration group catch several problems with a newly rebuilt drive motor. The waveform showed a fuzzy amplitude modulation that increased and decreased with every RPM. A look at the acceleration spectrum indicated a large amount of high-frequency noise well over 1g. Upon inspection, several internal retaining bolts were found to be backing out and contacting the frame of the motor rotor. The bolts were tightened to torque specifications, which was believed to have solved the problem. A week later, however, the problem reemerged as the bolts had once again backed out and began to rub. The bolts were again torqued to specification, but this time with an application of threadlocker, which held the bolts in place.

Had this problem not been identified by the fuzzy waveform and a high-frequency acceleration band alarm from the VIBNODE system, the errant bolts would have quickly eaten into the motor rotor and caused a catastrophic motor failure. The motor rebuild or replacement is valued at well over $100,000. And losses to production would have been many more times this amount.

Case study #2:

Low-speed equipment turning below 40 RPM is often difficult to analyze because of the low energy it produces. If there is not much energy, there is often not much to see. For this reason, the dynamic range of a vibration analyzer/data collector and its signal-processing quality become critical for low-speed machine analysis. Recently, a pulp mill using a VIBXPERT analyzer from Ludeca took a spectrum and time waveform on a slow-speed 35 RPM roll. The VIBXPERT is a portable, lightweight, 2-channel, FFT data collector/vibration analyzer for monitoring and diagnosis of machine conditions. As a data collector, VIBXPERT records all forms of machine vibrations, bearing conditions, process data and visual-inspection information.

Because of the dynamic range of the VIBXPERT, the mill’s maintenance technicians were able to see a repeating pattern in the time waveform. The recurring pattern was present for every RPM, and would increase slightly, then disappear for about three-quarters of the roll’s revolution. A delta cursor was placed on the repeating pattern and the source frequency was 420 CPM. This worked out to be the frequency of the inner race. A 25,000-line spectrum was also collected with a bandwidth of 7.5 CPM per line of resolution. The amplitude was very low below 0.0008 inches per second, yet a definite harmonic pattern appeared. The main harmonic pattern was at 420 CPM, with each peak having another underlying pattern of 35 CPM sidebands. The frequencies represented the inner race and roll RPM. Had this data been taken using a conventional spectrum with a resolution of 6400 lines or even 12,800 lines, this low-frequency/low-energy event would have looked like a spectrum ski slope and been ignored.

Upon removal of the bearing, a crack in the inner race was plainly visible. There was evidence the inner race had begun to walk around the shaft. If the bearing had been left in service it would have damaged the shaft and required that both the shaft and bearing be replaced. Instead, only a minimal two-hour shutdown was required to replace the bearing. Thanks to early detection, the cost of replacing a roll was averted, as well as saving the eight or more hours of lost production that a roll replacement would have required.

For more information about the techniques and products mentioned above, visit ludeca.com.

557

3:30 pm
January 27, 2014
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Don’t Procrastinate…Innovate!: Minute Maintenance, Part 1

ken bannister thumb thumb thumbBy Ken Bannister, Contributing Editor

With skilled workers no longer the renewable resource they once were, maintenance departments everywhere face a serious challenge for the future: Increasing quality-of-service and demand levels will significantly stress their ability to deliver unless a new work model is devised. That’s where innovation comes in. Innovation takes full advantage of the attributes that set us humans apart from other life forms (i.e., reasoning, problem solving, communicating through complex, nuanced language forms, abstract thinking, using tools, etc.), especially where adversity looms.

According to management guru Peter Drucker, “Efficiency is doing things right; effectiveness is doing the right things.” Translation: If maintenance organizations are to perform work in an environment where time and skill resources are budgeted, they must begin to evaluate their proactive methods and revise them for efficiency and effectiveness. One method I have devised for doing this capitalizes on a combination of problem solving, communication and abstract thinking: I call it the “Minute Maintenance” approach to proactive work.

Minute Maintenance is the pursuit and implementation of proactive methods, processes, techniques and tools designed to reduce or eliminate non-value-added (waste) maintenance activity to produce an efficient and effective result in minutes. It very much reflects a lean maintenance process.

Time is the most precious of commodities. When treated as such, it changes the way one views and approaches maintenance work. Any activity that doesn’t add value takes away meaningful utilization of the maintainer resource.

Take, for example, very large plants or where a maintenance department serves multiple sites/facilities: A centralized maintenance-shop approach means substantial staff time will be spent in back-and-forth travel. Adopting a decentralized or zone deployment system can help to reduce travel time and reclaim precious maintenance resource minutes. Similarly, use of cached inventory locations rather than a large central storeroom can reduce the time spent waiting for parts. In an advanced maintenance state, both strategies can be expanded upon with devices like smartphones and tablets to schedule just-in-time work orders, thereby eliminating time-consuming return trips to central maintenance for new work orders.

Another strategy involves issuing parts to convenient locations near job sites—or having them kitted, staged and drop-shipped internally or by a third-party supplier to the actual job site. This type of inventory transaction has long been associated with small auto-repair shops. Such businesses rarely carry inventory, preferring to place calls to parts-suppliers minutes before items are needed. A supplier, in turn, will kit the needed part(s) and deliver them to the shop in a matter of minutes. Although these are sophisticated strategies and processes that require highly disciplined planning and scheduling, there are many simple activities, techniques and tools that can add value and free up maintenance personnel for deployment where they can be better utilized.

The process in brief
Minute Maintenance achieves results through the introduction of innovative methods, processes and tools at the design phase of an asset or through systematic review, analysis, design and implementation of maintenance improvements to existing practices. In both cases, it is imperative that maintenance be involved in the process.

The Minute Maintenance process adopts a similar approach to the successful review, analysis and design process used in SMED (Single-Minute Exchange of Die), a lean process developed by Shigeo Shingo in the late 1950s to reduce time waste during a production line changeover (i.e., achieve a line change in 10 minutes or less). It begins with the maintenance team performing an existing process or PM job planas they typically wouldwhile timing and filming it. The team should include those normally involved in the referenced process, including the planner, scheduler, supervisor, maintainer(s) and operators.

Members of the team then reconvene in a facilitated brainstorming session to critically review the written flow diagram or PM instruction and recorded work session for waste (usually measured based on effort that produces little or no value) and propose improvements. Each idea is captured and reviewed for cost vs. practicality, expected return on investment in time and availability/reliability results. To be clear, some of the recommendations coming out of these brainstorming sessions will require reengineering and involve input from others.

Unlike a production department that may have one line and a handful of processes to consider, a maintenance organization can have hundreds of things to deal with. Expediency, therefore, would typically demand that maintenance departments begin by streamlining their major processes like planning and scheduling and inventory transactions. Or they can start with their most common and repetitive PM tasks like bearing lubrication or pulley and belt inspections.

Activities, techniques and tools
Efficiency and effectiveness is achieved through consistency. Consider a typical lubrication PM asking personnel to place a grease gun on a bearing and pump grease into it. If the job task simply states, “lubricate as necessary,” no two PMs will be completed the same way. With no control parameters specified, the PM would rely solely on the person performing it to understand if the correct grease is being applied in the correct amount to the correct number of bearings. To reach certain bearings, equipment may need to be taken offline and require lockout/tagout (LOTO) procedures and machine-guard removal. These are all time-consuming elements, none of which guarantees the equipment will be lubricated correctly every time. Taking a Minute Maintenance approach to this type of PM could result in numerous improvements at different levels.

Level One Improvements: Rewrite the PM job task using objective language. Identify and number all lubrication points on a schematic drawing that can be printed on the PM and/or laminated and attached to the equipment. Identify the grease to be used on the PM task and on the schematic drawing. Calculate the amount required for each bearing, translate into grease-gun strokes and identify on the PM and schematic—for every numbered bearing.

Level Two Improvements: Perform Level One Improvements. Review guard-access issues and design/install remote lubrication line extensions from guarded bearing points to outside the guard, eliminating the need to take off and reinstall guards. If there are many points behind one guard, review the possibility of redesigning it to a 30-second hinged guard (more about this in Part II). Negotiate to perform this PM during a production break so no downtime is encountered.

Level Three Improvements: Perform Level One Improvements. Design and install a centralized lubrication system with all lines connected to an engineered lubrication divider block mounted on the perimeter of the machine. A grease gun can now be attached to the divider block and pumped until an indicator pin visually indicates to the operator that all points have received an engineered amount of lubricant. While this level requires an inexpensive engineering modification, it allows an unskilled operator to perform the greasing—and does not require LOTO or equipment to be taken out of service to perform the PM. Accordingly, what could have taken an hour to complete can be accomplished in under five minutes.

This particular lubrication task could be taken to a fourth level through a fully automated centralized delivery system or by adding a pump and controller, eliminating the PM entirely. This would require another PM: to check that the system is operating correctly and the reservoir is always charged with grease.

Each level incrementally increases efficiency and effectiveness through waste elimination. The level chosen for adoption will depend on many factors—including the budget and the return-on-investment factor.

More tips and techniques will be covered in the March issue.

kbannister@engtech.com

Ken Bannister will speak on “Minute Maintenance” at MARTS 2014, as well as conduct a Pre-Conference Workshop on its use in lubrication fundamentals. For more, visit www.MARTSconference.com.

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