1.1 本试验方法涵盖了在高温下全孔水流下，将玻璃纤维管试样作为简单梁支撑在平坦的非弧形支架上，测量其挠度随时间的变化。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）都是玻璃纤维管。 注1: 就本标准而言，聚合物不包括天然聚合物。 1.2 该试验方法可用于通过替换其他试验介质来确定不同条件下的挠度。 1.3 使用本试验方法观察到的挠度仅代表在全孔流下作为简单梁支撑的管道，每个支撑处都有一个直径的管道悬垂。 1.4 以国际单位制表示的值应被视为标准。括号中给出的值仅供参考。 注2: 目前还没有与该标准等效的ISO。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 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====== 4.1 在实际安装的地上管道没有挠度测量的情况下，允许使用该试验方法来评估跨度长度对中间位置的影响- 全孔流下不同温度下的跨度挠度。 注3: 平坦的支承面积、较小的接触面积和较窄的支承宽度可能会引起较高的局部支撑相互作用应力，支撑施加的约束也可能对管道的挠度和性能产生不利影响。

1.1 This test method covers measurement of the deflection as a function of time of a specimen of fiberglass pipe supported on a flat non-arced support as a simple beam under full bore flow of water at elevated temperatures. 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 This test method can be used to determine deflection at varying conditions by substituting other test media. 1.3 Deflections observed using this test method are representative only of piping supported as a simple beam under full bore flow which has one diameter of pipe overhanging at each support. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only. Note 2: There is no known ISO equivalent to this standard. 1.5 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. 1.6 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 ====== 4.1 In the absence of deflection measurements from actual installed-above-ground piping, it is permissible to use this test method to evaluate the influence of span length on mid-span deflections at differing temperatures under full bore flow. Note 3: A flat bearing area, small contact area, and narrow bearing width may induce high localized support interaction stresses, and constraints imposed by the supports may also adversely influence deflections and performance of the pipe.