1.1 本试验方法涵盖了在承受循环内部液压时，确定增强塑料管的失效特征。它仅限于外径与壁厚之比为10:1或更大的管道。 1.2 以英寸-磅为单位的数值应视为标准值。括号中的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 注1: 没有已知的ISO等效于本标准。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 通过本试验方法获得的值仅适用于具体重复所用程序的条件。 5.2 通过本试验方法确定管道材料和制造过程的回归特性后，可使用一个压力进行质量控制。该压力应为原始测定中使用的点之一，并由相关人员商定。 5.3 该试验方法涉及管道的循环内压性能，忽略了蠕变和不可恢复变形测量。 5.4 关于使用本试验方法中的数据确定循环静水压设计基准，请参阅实施规程 D2992 . 5.5 在应用以下试验要求和建议时，假设给定管道样品的试样真正代表了该材料和制造工艺。 在为显示温度和压力对管道寿命的影响而进行的测试中，必须非常小心，以确保所测试的样本代表所研究的群体。偏离这一假设可能会产生比偏离本试验方法中概述的程序细节所产生的差异更大的差异。

1.1 This test method covers the determination of the failure characteristics of reinforced plastic pipe when subjected to cyclic internal hydraulic pressure. It is limited to pipe in which the ratio of outside diameter to wall thickness is 10:1 or more. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only. 1.3 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. Note 1: There is no known ISO equivalent to this standard. 1.4 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. ====== Significance And Use ====== 5.1 The values obtained by this test method are applicable only to conditions that specifically duplicate the procedures used. 5.2 After the regression characteristics of a pipe material and manufacturing process have been determined by this test method, one pressure may be used for quality-control purposes. This pressure shall be one of the points used in the original determination and be agreed upon between the individuals concerned. 5.3 This test method deals with cyclic internal pressure performance of a pipe and omits creep and nonrecoverable deformation measurements. 5.4 For determination of the cyclic hydrostatic design basis using data from this test method see Practice D2992 . 5.5 In the application of the following test requirements and recommendations it is assumed that test specimens of a given sample of pipe are truly representative of that material and manufacturing process. In tests conducted to show the effect of temperature and pressures on the life span of the pipe, great care must be taken to ensure that the specimens being tested are representative of the group being studied. Departure from this assumption could introduce discrepancies that are greater than those introduced by departure from the details of the procedure outlined in this test method.