1.1 水力侵蚀控制产品（HECP）纤维被制造和加工成特定的长度和宽度尺寸，以便于水力应用，并防止泵、再循环管道、喷嘴和尖端堵塞。该测试方法用于确定HECP中纤维的长度（以百分比为基础）。 1.2 该测试方法可用于在制造期间和之后评估HECP。结果可用于制造过程的比较评估。 1.3 单位- 以国际单位制表示的数值应视为标准。本标准不包括其他测量单位。标准和备选名称中均显示了筛的名称。 1.4 所有观测值和计算值应符合实践中确立的有效数字和舍入指南 D6026型 . 1.4.1 用于规定如何在标准中收集/记录或计算数据的程序被视为行业标准。此外，它们代表通常应保留的有效数字。 使用的程序不考虑材料变化、获取数据的目的、特殊目的研究或用户目标的任何考虑因素；通常的做法是增加或减少报告数据的有效位数，以符合这些考虑。考虑工程设计分析方法中使用的有效数字超出了本标准的范围。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 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（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 HECP的纤维长度对HECP有效混合和应用的能力起作用。制造商可使用本标准评估其制造过程（质量保证/质量控制）。实验室也可以使用该方法进行质量保证/质量控制，以及符合标准测试。 注1: 这些测试方法产生的结果质量取决于执行测试的人员的能力以及所用设备和设施的适用性。 符合实践标准的机构 第740页 通常认为能够胜任和客观的测试/取样/检验等。这些试验方法的使用者应注意遵守规程 第740页 其本身不能保证可靠的结果。可靠的结果取决于许多因素；实践 第740页 提供了评估其中一些因素的方法。

1.1 Hydraulic erosion control product (HECP) fibers are manufactured and processed to specific length and width dimensions to facilitate the hydraulic application and to prevent clogging of the pump, recirculation pipes, nozzles, and tips. This test method is used to determine the length of the fibers on a percentage basis in an HECP. 1.2 This test method can be used to evaluate an HECP during and after manufacturing. The results can be used for comparative evaluations of the manufacturing process. 1.3 Units— The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. Sieve designations are shown in both the standard and alternative designations. 1.4 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026 . 1.4.1 The procedures used to specify how data are collected/recorded or calculated in the standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. 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 ====== 5.1 The fiber length of an HECP plays a role in the ability of the HECP to effectively be mixed and applied. This standard can be used by manufacturers to evaluate their manufacturing process (quality assurance/quality control). Laboratories can also use this method for quality assurance/quality control and also conformance to criteria testing. Note 1: The quality of the result produced by these test methods is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of these test methods are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.