【国外标准】 Standard Test Method for Water Penetration of Metal Roof Panel Systems by Static Water Pressure Head

5.1 This test method is a standard procedure for determining water leakage through metal roof panel system sideseams, endlaps, and roof plane penetrations when the roof system is subjected to a specified static water pressure head.NOTE 2: In applying the results of tests by this method, note that the performance of a roof or its components or both, is in part a function of proper installation and adjustment. In service, the performance will also depend on the integrity of the supporting construction, roof slope, and on the resistance of components to deterioration by various causes: corrosive atmosphere, aging, ice, vibration, thermal cycling, etc. It is difficult to simulate the identical complex wetting, aging, and other variable conditions that can be encountered in service, including wind-blown ponded water; the effects of temperature and age on sealant performance; differential pressure across the joints due to wind, snow, and ice accumulation; densification and migration; and abrasions within the joint components which may occur during thermal cycling and other weather events. Some joint conditions are more sensitive than others to these factors.5.2 This test method will evaluate the resistance of roof panels, sideseams, endlaps, and roof plane penetrations to water submersion. It will not evaluate panel resistance to wind driven rain.NOTE 3: See Test Method E1646 for a test which evaluates resistance to wind driven rain.5.3 This test method is not a structural adequacy test.5.4 This test method is applicable to single skin metal panels, the exterior skin of factory assembled composite panels, and the exterior skin of field assembled composite systems as long as means can be provided to distinguish leakage through the exterior panel sideseams/endlaps and perimeter leakage.1.1 This laboratory test method covers the determination of the resistance to water penetration of exterior metal roof panel system sideseams, endlaps, and roof plane penetrations when a specified static water pressure head is applied to the outside face of the roof panel.NOTE 1: This test method is intended to evaluate water-barrier (not water-shedding) roof system joints and details. These systems are also referred to as hydrostatic roof systems.1.2 This test method is limited to specimens in which the sideseams and attachments are clearly visible and in which the source of leakage is readily observable.1.3 This test method excludes performance at roof perimeter conditions.1.4 This test method is suitable for evaluating leakage at roof plane penetrations such as fasteners, curbs, pipes, and expansion joints under a static water pressure head.1.5 The proper use of this test method requires a knowledge of the principles of water pressure.1.6 The text of this standard includes notes and footnotes excluding tables and figures, which provide explanatory material. These notes and footnotes shall not be considered as requirements of the standard.1.7 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.8 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Section 7.1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.