ASTM D4289 PDF

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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Inasmuch as the precision values apply only to the elastomers specified in Annex A1 of Test Method Dwhen a lubricant specification requires some other elastomer, the user and supplier of the lubricant should agree to the values of acceptable precision.

As the voice of the U.

Link to Active This link will always route to the current Active version of the standard. Fluid incompatibility is one of asttm leading causes of seal failure, so when a multi-million-dollar operation becomes dependent on the performance of a group of seals, it is critical that the testing is aztm, accurate and complete, and that the operator has confidence that the seal system will perform to its greatest ability.

To ensure full saturation, the testing ran for 2, hours, or 12 weeks.

Still, there are considerable inconsistencies among these tests. Subscription pricing is determined by: The company ran chemical compatibility simulations between 60 to 90 days, and in some cases longer.

Chemical Compatibility Study Reveals Shortfalls in Standard Testing Methods – System Seals Inc.

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. Add to Alert PDF. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a wstm server.

These include treating long polymers chains as super-condensed gasses and then defining their empirical values. Please first verify your email before subscribing to alerts. Two HNBRs, for instance, might demonstrate different property changes depending on the levels of fillers and dd4289.

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If the document is revised or amended, you will be notified by email. Approximately 25 percent of the material-fluid combinations that successfully passed at the day mark, soon began to fail near or after 60 days. It is recommended that the agreed upon precision values be stated in the user’s lubricant specification. The duration times dedicated to the tests are not standardized, nor are they often specified.

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. During the testing it became necessary to understand how the mechanical properties changed from exposure. The compatibility testing consisted of three main components: In most cases, testing reveals little to no information about any actual changes in material properties.

Even in a thorough compatibility program, performance can only be inferred. Standards Subsctiption may be the perfect solution. This was found to be a significant gap in historic testing methods. The ultimate purpose of 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.

Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids

Higher temperatures were used for specific high-temperature applications. 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.

Testing Parameters The base test parameters included volume swell, mass and density changes, hardness, tensile strength, elongation, percent modulus, work function area under tensile curve up to 20 percentcompression set and abrasion resistance.

Virtually all other equipment and supplies specified in the procedure are stock items in lubricants laboratories.

ASTM D4289 – 13(2014)e1

For example, a dynamic seal may be required to retain more of its original properties than a static seal. Standards Subsctiption may be the perfect solution.

Industry Standard Tests Theoretical models that have been established ast predict fluid compatibility are based largely on the laws of chemistry. However, they can be correlated in many instances. In such instances, the repeatability and reproducibility values stated in Section 12 do not apply, and the user and supplier should agree on acceptable limits of precision.

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However, they can be correlated in many instances. Such values may or may not be the same as those of Test Method D Most test standards also do not incorporate changes in the transition temperature, which is critical for low-temperature applications. Volume swell is a good indicator of fluid absorption, which is important because many seal grooves have between percent free space available. The scope of this test method now includes the evaluation of the elastomer compatibility of both lubricating fluids and greases.

Several of the fluid-material combinations that passed successfully within 28 days failed after longer exposures. What asstm approach fails to address are the interactions between an actual polymer material and the specific formula of a given fluid — including a host of additives and contaminants that often go unaccounted for but significantly alter the equation.

This standard is also available to be included in Standards Subscriptions. Emulsions at higher temperatures, for example, tended to wstm, and biodegradable fluids acidified. Historical Version s – view previous versions of standard. For specific warning statements, see 8. Need more than one copy? Asm values may or may not be the same as those of Test Method D 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.

Excepting the Shore Durometer A, this test method requires no specialized, rubber-testing equipment. Simple rankings and broad generalizations about seal properties and related families are inadequate for effective engineering purposes. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

You may delete a document from your Alert Profile at any time. Inasmuch as the precision values apply only to the elastomers specified in Annex A1 of Test Method Dwhen a lubricant specification requires some other elastomer, the user and supplier of the lubricant should agree to the values of acceptable precision.

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