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ASTM E96/E96M-12
Standard Test Methods for Water Vapor Transmission of Materials
Automaticky přeložený název:
Standardní zkušební metody pro prostupu vodních par materiálů
NORMA vydána dne 15.12.2012
Informace o normě:
Označení normy: ASTM E96/E96M-12
Poznámka: NEPLATNÁ
Datum vydání normy: 15.12.2012
Kód zboží: NS-48607
Počet stran: 12
Přibližná hmotnost: 36 g (0.08 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Anotace textu normy ASTM E96/E96M-12 :
Keywords:
permeability, plastics (general), plastic sheet and film, sheet material, thermal-insulating materials, thermal insulation permeability films, water vapor transmission (WVT), ICS Number Code 77.040.99 (Other methods of testing metals)
Doplňující informace
| Significance and Use | ||
|
5.1 The purpose of these tests is to obtain, by means of simple apparatus, reliable values of water vapor transfer through permeable and semipermeable materials, expressed in suitable units. These values are for use in design, manufacture, and marketing. A permeance value obtained under one set of test conditions may not indicate the value under a different set of conditions. For this reason, the test conditions should be selected that most closely approach the conditions of use. While any set of conditions may be used and those conditions reported, standard conditions that have been useful are shown in Appendix X1. |
||
| 1. Scope | ||
|
1.1 These test methods cover the determination of water vapor transmission (WVT) of materials through which the passage of water vapor may be of importance, such as paper, plastic films, other sheet materials, fiberboards, gypsum and plaster products, wood products, and plastics. The test methods are limited to specimens not over 11/4 in. (32 mm) in thickness except as provided in Section 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. However, derived results can be converted from one system to the other using appropriate conversion factors (see Multiply |
by |
To Obtain (for the |
|
WVT |
||
|
g/h·m2 |
1.43 |
grains/h·ft2 |
|
grains/h·ft2 |
0.697 |
g/h·m2 |
|
Permeance |
||
|
g/Pa·s·m2 |
1.75 × 107 |
1 Perm (inch-pound) |
|
1 Perm (inch-pound) |
5.72 × 10−8 |
g/Pa·s·m2 |
|
Permeability |
||
|
g/Pa·s·m |
6.88 × 108 |
1 Perm inch |
|
1 Perm inch |
1.45 × 10−9 |
g/Pa·s·m |
1.3 This standard does not
purport to address all of the safety problems, if any, associated
with its use. 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.
|
Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
|
|
Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods |
|
|
Standard Specification for Vinyl Chloride Plastic Pressure-Sensitive Electrical Insulating Tape |
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Standard Specification for Asphalt Used in Dampproofing and Waterproofing |
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Standard Practice for Preparation of Specimens and Reporting of Results for Permeance Testing of Pressure Sensitive Adhesive Sealed Joints in Insulation Vapor Retarders |
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Standard Terminology Relating to Thermal Insulation |
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