We perform testing by ASTM D to evaluate the compatibility of lubricants with elastomers by measuring the changes in an elastomer immersed in lubricant . ASTM D()e1. Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids. standard by ASTM. Buy ASTM D TEST METHOD FOR ELASTOMER COMPATIBILITY OF LUBRICATING GREASES AND FLUIDS from SAI Global.
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Proceed to Checkout Continue Shopping. In critical applications where the lubricant will be in contact with rubber parts subject to severe flexing, extreme temperatures, or similar stresses, other rubber properties, such as tensile strength and elongation, should also be evaluated as they may be more indicative of the true compatibility characteristics.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Traditional methods to determine elastomer seal compatibility with specific fluids have for decades produced misleading results, according to a new research from System Seals Laboratories.
No other units of measurement are included in this standard. An increase in d289 might also indicate fluid absorption, and a loss in mass usually indicates chemical degradation. Virtually all other equipment and supplies specified in the procedure are stock items in lubricants laboratories.
Such values may or may not be the same as those of Test Method D It is recommended that the agreed upon precision values be stated in the user’s lubricant specification.
When the preparation of such coupons is not feasible, or the lubricant specification requires the use of rubber products that do not have a suitable size or configuration for use in preparing coupons for testing Practice Dthis test method can be used as a guide for evaluating compatibility. Need more than one copy?
Your Alert Profile lists the documents that will be monitored. It is recommended that the agreed upon precision values be stated in the user’s lubricant specification. These include treating long polymers chains as super-condensed gasses and then defining their empirical values.
The company ran chemical compatibility simulations between 60 to 90 days, and in some cases longer. This d42289 that a quarter of all tests commonly performed throughout the industry for 28 days will likely show false results. This standard is also available to be included in Standards Subscriptions. You may delete a document from your Alert Profile at any time. However, they can be correlated in many instances. Engineering Applications The ultimate purpose qstm a chemical compatibility program is to evaluate the ability of an elastomer to function as a seal in its intended application when exposed to a working fluid.
Chemical Compatibility Study Reveals Shortfalls in Standard Testing Methods
Testing at the System Seals laboratory revealed that some fluid-material combinations that appear compatible at 1, hours later d42289 incompatible after 2, hours. These results are limited for a number of reasons. If the document is revised or amended, you will be notified by email. Contraction, however, is more problematic because loss of seal volume reduces seal force. For specific hazard statements, see Note 6, Note 7, and Note 8.
Need more than one copy? Industry Standard Tests Theoretical models that have been established to predict fluid compatibility are based largely on the laws of chemistry.
Chemical Compatibility Study Reveals Shortfalls in Standard Testing Methods – System Seals Inc.
If the document is revised or amended, you will be notified by email. Add to Alert PDF. Proceed to Checkout Continue Shopping.
Your Alert Profile lists the documents that will be monitored. Higher temperatures were used for specific high-temperature applications. To address these limitations, testing standards have been established to evaluate compatibility. Fluid and seal manufacturers routinely perform their own tests, which usually result in compatibility ratings in broad generalizations for entire families of elastomers.
Approximately 25 percent of the material-fluid combinations that successfully passed at the day mark, soon began to fail near or after 60 days. When volume increases are limited to 15 percent, contraction can be no more than 5 percent. Already Subscribed to this document.
ASTM D – 03 Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
To advance the compatibility study, application testing should be performed. The scope of this test method now includes the evaluation of the elastomer compatibility of both lubricating fluids and greases. Standards Subsctiption may be the perfect solution. For example, a dynamic seal may be required to retain more of its original properties than a static f4289.
Volume swell is a good indicator of fluid absorption, which is important because many seal grooves have between percent free space available. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Compatibility is evaluated by determining the changes in volume and Durometer A hardness that occur when elastomer coupons are totally immersed in a lubricant sample for 70 h at either or oC or as required by the lubricant specification.
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This standard is not included in any packages. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. In critical applications where the lubricant will be in contact with rubber parts subject to severe flexing, extreme temperatures, or similar stresses, other rubber properties, such as tensile strength and elongation, should also be evaluated as they may be more indicative of the true compatibility characteristics.
The compatibility d42289 consisted of three main components: Similarly, this test method can be used in specifications for lubricating fluids as well. Emulsions at higher temperatures, for example, tended to demulsify, and biodegradable fluids acidified.
As the voice of the U. As the voice of the U.