Home>ASTM Standards>ASTM D4637-15(R2021) pdf free download

ASTM D4637-15(R2021) pdf free download

ASTM D4637-15(R2021) pdf free download.Standard Specification for EPDM Sheet Used in Single-Ply Roof Membrane
1. Scope
1.1 This specification covers flexible sheet made from ethylene-propylene-diene terpolymer (EPDM) intended for use in single-ply roofing membranes exposed to the weather. The tests and property limits used to characterize the sheet are values to ensure minimum quality for the intended use. The sheet may be non-reinforced, fabric- or scrim-reinforced, or fabric-backed vulcanized rubber sheet. 1.2 In-place roof system design criteria, such as fire resistance, field seaming strength, material compatibility, and uplift resistance, among others, are factors that must be considered but are beyond the scope of this specification. 1.3 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 nonconformance with the standard. 1.4 This standard 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 standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Materials and Manufacture
4.1 The sheet shall be formulated from EPDM polymers and other compounding ingredients. EPDM shall be the principal polymer used in the sheet and shall be greater than 95 % of the total polymer content. 4.2 To make seams and repairs, the sheet shall be capable of being bonded watertight to itself and the supplier or fabricator shall recommend suitable methods.
5. Physical Properties and Tolerances
5.1 The sheet shall conform to the physical requirements prescribed in Table 1. 5.2 The tolerance for time conditions (aging, weathering, and so forth) is 615 min or 61 % of the period, whichever is greater, unless otherwise specified. 5.3 Tolerances for temperature shall be 62 °C [64 °F].
6. Dimensions
6.1 The width and length of the sheet shall be agreed upon between the purchaser and the supplier. 6.1.1 The width and length tolerance shall be +3 %, −0 %. 6.2 The thickness tolerance shall be +15 %, −10 % of the thickness agreed upon between the purchaser and supplier, but in no case shall the thickness be less than the minimum listed in Table 1.
7. Workmanship, Finish, and Appearance
7.1 The sheet, including the full width of factory seams if present, shall be fully adhered, watertight, and visibly free of pinholes, particles of foreign matter, undispersed raw material, or other manufacturing defects that might affect serviceability. If the number of irregularities in the form of pockmarks (see Note 1) appears excessive on the sheet (or portion thereof), then its rejection shall be negotiated between involved parties. 7.2 Edges of the sheets shall be straight and flat so that they may be seamed to one another without fishmouthing. N OTE 1—Pockmarks are oblong depressions, cavities, or craters on the surface of the sheet that have an approximate surface dimension of 3.2 by 1.6 mm [ 1 ⁄ 8 by 1 ⁄ 16 in.], and have a maximum depth approaching one half of the sheet thickness.
8. Test Methods
8.1 Dimensions—Test Methods D751, after permitting the sheet to relax at 23 6 2 °C [73.4 6 4 °F] for 1 h 6 15 min. 8.2 Thickness, Sheet Overall—From across the full width of the unbuffed sheet, take three samples, 300 by 300 mm [1 by 1 ft]. Measure the thickness of each corner. On fabric backed (Type III) the coating thickness can be measured after cutting or buffing fabric from the rubber. Refer to Test Methods D412 for Type I sheet and Test Methods D751 for Type II and Type III sheet. 8.3 Thickness of Coating Over Scrim (Reinforcing Fabric)—Follow preparation procedures as specified in Test Method D7635/D7635M. The thickness measurements shall be conducted as described in the test method on the coating on the side intended to be exposed to the weather.

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