1 Scope
1.1 These test methods cover the determination of the effect on physical properties of nonmetallic gasketing materials after immersion in test fluids. The types of materials covered are Type 1, Type 2, Type 3, and Type 7 as described in GB/T 20671.1. These test methods are not applicable to the testing of vulcanized rubber, a procedure that is described in Test Method D 471. It is designed for testing specimens cut from gasketing materials or from finished articles of commerce. These test methods may also be used as a pre-treatment for Multi-Layer Steel, MLS, or Metal Layer Gasket materials adhesion testing per Test Method D3359. The pre-treatment of MLS or Metal Layer Gasket materials pertains only as a pre-cursor to the adhesion test. Other physical property tests described in this standard are not applicable to MLS or Metal Layer Gasket materials.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 Attention shall be paid to any precautionary labeling provided by the supplier of any materials referred to in these test methods.
1.4 This part does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this part to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2 Normative References
The following standards contain provisions which, through reference in this part of GB/T 20671, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies
GB/T 20671.1 Classification System and Test Methods for Nonmetallic Gasket Materials - Standard Classification System for Nonmetallic Gasket Materials
GB/T 20671.2 Classification System and Test Methods for Nonmetallic Gasket Materials - Part 2: Standard Test Method for Compressibility and Recovery of Gasket Materials
GB/T 20671.7 – 2006 Classification System and Test Methods for Nonmetallic Gasket Materials - Part 7: Standard Test Method for Adhesion of Gasket Materials to Metal Surfaces
GB/T 20671.8 Classification System and Test Methods for Nonmetallic Gasket Materials - Part 8: Standard Test Method for Flexibility of Non-Metallic Gasket Materials
ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers
ASTM D471 Standard Test Method for Rubber Property - Effect of Liquids
ASTM D3359 Standard Test Methods for Rating Adhesion by Tape Test
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3 Summary of Test Methods
3.1 Appropriate test specimens are subjected to complete immersion in test fluids. After immersing the specimens in the various test fluids, the effect on physical properties is expressed as change in tensile strength, compressibility in softened condition, flexibility, volume change, and thickness and weight changes from the original condition.
4 Significance and Use
Foreword I
1 Scope
2 Normative References
3 Summary of Test Methods
4 Significance and Use
5 Apparatus
6 Test Specimens
7 Temperature of Test Measurement
8 Conditioning
9 Procedure
10 Report
11 Precision and Bias
12 Keywords
Annex A (Informative) Test Fluid
Annex B (Informative) Procedure of Determining Volume Change after Immersion in Fluid
