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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Please first verify your email before subscribing to alerts. 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. ASTM D, for instance, typically incorporates tests with a maximum exposure time of 70 hours, which significantly limits long-term predictive capabilities.
Even in a thorough compatibility program, performance can only be inferred. Such values may or may not be the same as those of Test D4829 D Similarly, this test method can be used in specifications for lubricating fluids as well.
Norma ASTM D()e1
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. We have no amendments or corrections for this standard. To advance the compatibility study, application testing should be performed. But volume swell does not indicate chemical reaction on its own. This standard is also available to be included in Standards Subscriptions.
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. To ensure full saturation, the testing ran for 2, hours, or 12 weeks.
Need more than one copy? Please first log in with a verified email before subscribing to alerts. And in many test recommendations, there are no established guidelines for static or dynamic applications. Please first log in with a verified email before subscribing to alerts. 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.
In most cases, testing reveals little to no information about any actual changes in material properties. Subscription pricing is determined by: The times vary considerably among manufactures, usually ranging from a week to 30 days.
To fully evaluate material-fluid compatibility, System Seals developed new methods from various standards, as well as experience from seals in broad applications.
Fluid incompatibility is one of the 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 sufficient, accurate and complete, and that the operator has confidence that the seal system will perform to its greatest ability.
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It is recommended that the agreed upon precision values be stated in the user’s lubricant specification. Although some guidelines can be used to make engineering decisions, these values could be flexible or rigid, depending on the application.
Chemical Compatibility Study Reveals Shortfalls in Standard Testing Methods
For specific hazard statements, see Note 6, Note 7, and Note 8. 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. Still, there are considerable inconsistencies among these tests. Historical Version s – view previous versions of standard. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
Standards Subscriptions from ANSI d429 a money-saving, multi-user solution for accessing standards. Fluid and seal manufacturers routinely perform their axtm tests, which usually result in compatibility ratings in broad generalizations for entire families of elastomers.
For the past several years, System Seals, a research-based seal manufacturer in Cleveland, has undertaken an exhaustive fluid compatibility study that paired more than combinations of seal materials with commonly used industrial fluids.
To ensure full fluid saturation into the elastomer, both time and temperature were specified to accelerate ageing.
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.
ASTM D Standard Method of Testing Compatibility of Lubricating Grease with Elastomers
As the voice of the U. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory x4289 prior to use. Approximately 25 percent of the material-fluid combinations that successfully passed at the day mark, soon began to fail near or after 60 days.
The company ran chemical d42289 simulations between 60 to 90 days, and in some cases longer. Two HNBRs, for instance, might demonstrate different property changes depending on the levels of fillers and additives.
No other units of measurement are included in this standard. Testing of fluids was not included in Test Method D —95 and earlier versions. 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. asttm
For example, a dynamic seal may be required to retain more of its original properties than a static seal. This was found to be a significant gap in historic testing methods. Emulsions at higher temperatures, for example, tended to demulsify, and biodegradable fluids acidified.
Testing of fluids was not included in Test Method D – 95 and earlier versions. When the preparation of awtm coupons is not feasible, or aastm 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.