Maintenance & Repair
- Published on Friday, 22 November 2013 15:48
- Written by Gary Ostrowski
Not long ago, a common practice for companies in the chemical, power and refining industries was to have personnel on staff to handle many valve maintenance and service activities. Today, as skilled professionals of the baby boomer generation retire and companies face increasing pressure to contain costs, a growing number of firms are turning to outside vendors to help them manage the health of their valves.
One territory can have dozens of firms that offer valve maintenance and repair services. Stories shared by customers over the years clearly illustrate, however, that these shops are not all created equal. The specifics about how they differ vary, but the plotlines have been essentially the same: Valves coming back from the repair shop looked great. Testing, however, told a different story. Many of the valves have not been repaired correctly and are not performing to OEM requirements. This usually results in higher maintenance costs and/or lost production. It also can mean compromised product quality and unnecessary safety risks.
Careful consideration and a bit of homework are required in selecting a valve maintenance and repair provider. This article outlines criteria to consider.
Most valve OEMs have a list of authorized service providers. No one is required to choose one of these providers, but the credential of being listed as authorized is one sign of a quality shop.
To become an authorized service provider, a shop must meet specific criteria the OEM sets in areas such as integrity, safety and environmental compliance. Plus, the team is required to complete the OEM’s training program. Usually, OEMs hold certified shops to high standards when it comes to facilities, equipment and personnel. Knowing that a service provider meets these criteria, however, gives companies added confidence that they are dealing with a reputable shop.
OEMs regularly audit their authorized service providers to ensure they are meeting the necessary performance standards. While ISO 9000 is a good standard to be followed, it is not a valve operating guideline. When it comes to valve assembly/testing and repair, the OEM is the body best equipped to conduct the detailed review necessary and is willing to share audit reports.
Additionally, OEM-authorized service providers have access to important details regarding the properties, construction and workings of a specific valve or part. This is because OEMs build their products to rigorous specifications. While it’s true that a valve or part can be re-engineered, only the OEM knows the original specs with certainty.
An OEM-authorized service provider also receives extensive product training from the OEM and can consult with the OEM’s engineers to diagnose problems. An authorized shop will use OEM parts, rather than re-engineered parts, helping to ensure that the valve performs as expected.
Finally, not using an OEM-authorized service provider may void the manufacturer’s warranty.
ASSET MANAGEMENT TOOLS
A significant differentiator between valve service shops today is the ability to provide asset management tools. These tools put valve records—including repair data, repair records, test documentation, wiring diagrams and “before” and “after” photos”—in a single, easy to use, accessible database. The customer owns the data and can access that information 24 hours a day.
This added capability can simplify record-keeping for inspections and make it easier to meet reporting requirements. But asset management tools can be so much more than just a document management tool—they can be a plant manager’s best friend. Some, for example, provide analysis features and can assist in detecting trends for repairs, some manage inventory for optimization, others provide features such as “turn-around management” clouds where one can drag and drop valves for planning a turnaround. Others help with diagnostics and provide recommended solutions for resolving issues.
When a person chooses a physician, he or she is likely to consider degree of education, specialized training and other credentials. The same criteria should apply when choosing a valve service partner. Those choosing should ask to see a firm’s training certificates; and find out whether the technicians are trained in the latest OEM standards, as well as relevant standards from organizations such as the American Society of Mechanical Engineers. They also should ask whether the technicians’ certificates are up-to-date because training is not a one-time task, but a continuous process.
Today, when your car has an odd noise, your mechanic uses computer-based tools to diagnose the problem. A solid valve service provider will have similar tools in its collection.
For example, a technician working with pressure-relief valves should have electronic valve testers that can test a valve in-line and in production (in-situ). For control and line valves, technicians should have a diagnostic unit that can compare current valve data to “Day One” baseline data. With a significant number of analog positioners still in use, such devices can help remove the guesswork from assessing valve health.
ACCESS TO INVENTORY
Even the best technician cannot get a process running again without the necessary parts, replacement valves and other devices. When something is needed to get that process going, the best providers of maintenance and repair services will simply pull from their well-stocked shelves the necessary OEM parts, valves, positioners, etc.
Certainly, it is impossible for a service provider to have every SKU in its warehouse. But affiliation with a network of service facilities can provide access to millions of dollars of inventory that can be on hand in days, and sometimes even hours. A prospective service provider needs to belong to such a network.
A growing number of facilities are adopting digital technologies such as wireless communication, valve diagnostics, the HART Protocol, the FOUNDATION fieldbus and PROFIBUS. A strong service provider will have a “digital champion” on staff or accessible who can guide users and who has the technical expertise to advise on when to upgrade to digital technology.
A tour of a prospective service provider’s facility can reveal much. Such a tour should include stops at areas in the shop for sandblasting, machining, welding and painting. Take note of whether the shop is neat, clean and well-lit; organization of that shop is closely correlated to quality. After all, would anyone hire an accountant whose office was wall-to-wall stacks of paper? As an added benefit, some providers also have onsite facilities where they offer training for their customers.
Choosing a valve service provider requires time and effort. But given the importance of valves to any process facility’s performance, the decision cannot be taken lightly. The key is: Do your homework; it will be time well spent.