- Buyer's Guide
In this competitive economy, we are all doing what we can to reduce costs, improve uptime and maintain reliability. One of the ways that industrial facilities are coping with the economic meltdown is to negotiate new contracts with new lubricant suppliers in hopes that the new deals will have more savings built into them.
Often, the name of the game when sourcing new lubricant suppliers and writing new contracts is leverage. What's your annual lube consumption? Is this a corporate contract or is it applicable to one plant? Buying power always comes when negotiating large volumes. The more demand for product on one contract, the more leverage you'll have overall.
Obviously, the most maneuverable contract is the corporate contract. If all of your plants in all divisions have lubrication needs that can be covered by a single supplier, that supplier is likely to offer deep discounts based on the total annual consumption as a sum of all the plants. Your buying and negotiating power is the strongest in this situation.
If there are divisional needs to seek a new lubricant supplier, this also can prove to be a powerful negotiating tool depending on annual need and the number of facilities involved. It's important to seek a supplier that can provide you with as close to 100 percent of your lubricant needs as possible. Committing to a single supplier not only helps when negotiating contracts but also aids with inventory and procurement.
Local contracts have the least negotiating power in most situations. Unlike the other two scenarios, in this case, your facility would likely deal directly with the local supplier to arrange the best deal for a single plant. The other scenarios would see your company's corporate procurement team deal directly with the corporate sales team of the lubricant manufacturer.
Separate and Not Equal
Price and delivery expectations aside, the most important thing to remember is that the reliability of your equipment is paramount, and the need to ensure that the appropriate product gets into the machine cannot be overstated. After the deal is done, either corporately or locally, you need to begin swapping your current lubrication products for the new supplier's products. When changing lubricant suppliers, it is important to recognize three categories of product equivalents.
Equivalent products are considered equal in the areas of lubricant type (anti-wear, extreme pressure, compounded, etc.), ISO Viscosity Grade (viscosity at 40 degrees Celsius), base oil type (synthetic, petroleum, semi-synthetic), additive package and other special properties, if applicable.
Crossover products are not considered to be equal in all areas, but they will do the job if one or more compromises can be made. One or more of the areas of lubricant type, ISO VG, base oil type, additive package and other special properties, if applicable, may not be the same. In many cases, the crossover lubricant will meet the criteria and lubricant requirements of specific components, but it should not be used as a plant-wide global change. Crossovers are typically recommended as a result of the new supplier not having a truly equivalent product available. Synthetic upgrades will also fall into this category by definition.
Not-equivalent products are not equal and should be considered miscalculations from the new lubricant supplier representative or whoever was providing information on product selection. Further consideration is required for lubricants that fall into this category.
Is It a Match or Not?
The challenge with changing from one supplier's product to another is being confident that the correct products are currently in place. If you have systems currently using inappropriate products, the supplier switch will only perpetuate the use of an incorrect product.
To help ensure that you have the correct product in place, it is always recommended that as products are gradually transitioned from one supplier to the next, you reference your Lubrication Process Design database to clarify the specific product requirements vs. the general requirements of one product to another product. If a current lubrication database does not exist, you must systematically work through each component in the plant and determine the correct lubricant for the application.
When selecting component-specific lubricants, it's important to adjust for operating temperature, ambient temperature, humidity and contamination, vibration, and duty cycle, trying not to generalize lubricant specifications for component categories.
It is also very important to consider the compatibility of the current product and the replacement product. Although replacement products may share similar attributes, they may not be compatible.
Flush and Fill
When changing lubricants from one product to another, it is a good idea to consider them less than fully compatible, though the supplier may consider them compatible based on past experience. Without proper compatibility data, it is not recommended to use one product on top of another. At a minimum, armed with compatibility data from the lubricant supplier, a complete drain is required on all fluid systems. For grease systems, a complete purge is recommended for housings that are equipped with vent or relief plugs. For grease systems that do not have appropriate venting or relieving plugs, a manual removal of grease is recommended before the new product is used.
Lubricants considered to be crossovers require a little more attention than a simple drain and fill. When product upgrades from mineral-based to synthetic products are recommended, a system flush using the new product is required. The system should be drained of the original product, filled with the new product, operated under normal operating conditions for 12 to 24 hours, drained and filled again. Oil analysis should be done after the last fill to compare against a new oil baseline.
When changing current products to competitive products known to be incompatible, it is recommended that a complete drain and fill with a system flush be performed, using the supplier's recommended cleaning solvent, to minimize the risk of cross-contamination.
Notes and Reminders
Generally speaking, it's always best to request compatibility data from the lubricant supplier when that supplier claims two products are "compatible" or "fully compatible".
Compatibility data for greases should conform to ASTM D6185 and include test results on product mixtures for consistency, dropping point and shear stability. Compatibility data for oils mixed at 50/50, 90/10 and 10/90 should include test results for demulsibility, foaming tendency and stability.
Approach all product crossovers as not fully compatible. Using one lubricant manufacturer's product on top of a competitive product is never recommended. In most cases, a complete lubricant drain is required at a minimum. In critical cases, such as compressors, a flush also is recommended.
Follow the recommendations found in your Lubrication Process Design database for component specific lubrication requirements when changing lubricants to ensure the appropriate product is put into service.
Also, for critical and questionable lubricant changeouts, confirm everything with oil analysis.