概念
The specification covers flexible fiber or fabric-reinforced panels made of polyvinyl chloride resin as the main polymer for single-layer roof membranes exposed to weather. The table should contain. Design criteria for on-site roof systems, such as fire resistance, material compatibility, wind lift resistance, in-situ shrinkage, 等等, are beyond the scope of this specification. The sheet shall be tested and shall meet the corresponding physical requirements as follows: total thickness and thin turmeric thickness; Tensile strength at fracture; Breaking strength; 断裂伸长率; Joint strength; Performance retention after thermal aging; Tear resistance and tear strength; Low temperature bending; Cracking and cracking after accelerated aging test; Linear size change; Weight changes after immersion in water; Static and dynamic puncture resistance.
ASTM D4434-2021 Polyvinyl Chloride Roofing Sheet
半径
1.1 This specification covers flexible panels made of polyvinyl chloride resin, which is the main polymer used for single-layer roof film that is exposed to weather. The sheet shall contain reinforced fiber or reinforced fabric.
1.2 The tests and performance limits used to characterize the plates are designed to ensure the minimum quality for the intended purpose. Design criteria for on-site roof systems, such as fire resistance, material compatibility, resistance to wind lift, in-situ shrinkage, 等等, are factors that need to be considered but are beyond the scope of this specification.
1.3 以 SI 单位或英寸-磅单位表示的值应单独视为标准值. The values specified in each system may not be fully equivalent; 当使用摆杆 Sunny 测试仪测量涂层厚度时, each system should be used independently of each other. Combining values from two systems may result in non-compliance.
1.4 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全机制, 健康和环境实践，并在使用前确定监管限制的适用性.
1.5 本国际标准基于《关于制定国际标准的原则的决定》中确立的国际公认的标准化原则, Guidelines and Recommendations issued by the WTO Committee on Technical Barriers to Trade.