1.1 该试验方法包括测定玻璃纤维管对外部压力的阻力。它将失效分为屈曲、压缩和泄漏。玻璃纤维增强热固性树脂管（RTRP）和玻璃纤维增强聚合物砂浆管（RPMP）均为玻璃纤维管。 注1: 就本标准而言，聚合物不包括天然聚合物。 1.2 以英寸磅为单位的数值应视为标准。括号中给出的国际单位制仅供参考。 注2: 目前还没有与该标准等效的ISO。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 通过该试验方法获得的值仅适用于与所用程序特别重复的条件。 5.2 在确定了一个直径的比例常数后，这可以用于计算其他直径的外部破坏压力，只要树脂和钢筋（如果使用）、壁厚与直径的比率和钢筋图案（如果使用钢筋）相同。 注3: 基于对一种尺寸的管道进行的测试，根据 10.1 或 10.2 。适当的常数用于计算其他管道直径的破坏压力，但只有在使用相同的树脂和钢筋、壁厚与直径之比相似且钢筋样式不变的情况下才能应用。 5.3 在应用以下测试要求和建议时，必须注意确保测试的样本真正代表所研究的组。

1.1 This test method covers determination of the resistance of fiberglass pipe to external pressure. It classifies failures as buckling, compressive, and leaking. Both glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are fiberglass pipes. Note 1: For the purposes of this standard, polymer does not include natural polymers. 1.2 The values stated in inch-pound units are to be regarded as standard. The SI units given in parentheses are for information only. Note 2: There is no known ISO equivalent to this standard. 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. 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 a scaling constant is determined for one diameter, this may be used for calculating the external failure pressures of other diameters as long as the resin and reinforcement (if used), the wall thickness-to-diameter ratio, and the reinforcement pattern (if reinforcement is used) are the same. Note 3: Based upon tests conducted on one size of pipe, a scaling constant is calculated according to 10.1 or 10.2 . The appropriate constant is used to calculate failure pressure for other pipe diameters, but it can only be applied if the same resin and reinforcement are used, the wall thickness to diameter ratios are similar, and the reinforcement pattern is constant. 5.3 In the application of the following test requirements and recommendations, care must be exercised to ensure that the specimens tested are truly representative of the group being studied.