1.1 本试验方法涵盖100℃时粘度损失百分比的测量 使用喷油器剪切稳定性试验（FISST）设备测定含聚合物液体的°C。粘度损失反映了由于喷嘴处的剪切而导致的聚合物降解。 注1: 试验方法 D2603 已用于该物业的类似评估。它有许多与重要性声明中指出的相同的局限性。尚未对声波法和柴油喷射器法的结果进行详细关联。 注2: 本试验方法最初发布为试验方法程序B D3945 . FISST方法是一种单独的试验方法，对一系列含聚合物的流体进行的试验表明，试验方法的程序a和B D3945 通常会得出不同的结果。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.2.1 例外情况- 对于只有PSI仪表的仪表，括号中提到了PSI。马力HP列在括号中，因为电机标签显示该值。 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。 第节给出了具体的预防说明 7. . 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====== 4.1 本试验方法评估了高剪切喷嘴装置中聚合物降解导致的含聚合物流体的粘度损失百分比。预计热效应或氧化效应的干扰最小。 4.2 本试验方法不用于预测不同聚合物类别或不同现场设备的现场服务中的粘度损失。可以在特定现场设备中对特定聚合物类型进行某种关联。

1.1 This test method covers the measurement of the percent viscosity loss at 100 °C of polymer-containing fluids using fuel injector shear stability test (FISST) equipment. The viscosity loss reflects polymer degradation due to shear at the nozzle. Note 1: Test Method D2603 has been used for similar evaluation of this property. It has many of the same limitations as indicated in the significance statement. No detailed attempt has been undertaken to correlate the results by the sonic and the diesel injector methods. Note 2: This test method was originally published as Procedure B of Test Methods D3945 . The FISST method was made a separate test method after tests of a series of polymer-containing fluids showed that Procedures A and B of Test Methods D3945 often give different results. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 Exception— PSI is mentioned in parentheses for instruments that have only PSI gauges. Horsepower, HP, is listed in parentheses since the motor labels display this value. 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. Specific precautionary statements are given in Section 7 . 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 ====== 4.1 This test method evaluates the percent viscosity loss for polymer-containing fluids resulting from polymer degradation in the high shear nozzle device. Minimum interference from thermal or oxidative effects are anticipated. 4.2 This test method is not intended to predict viscosity loss in field service for different polymer classes or for different field equipment. Some correlation for a specific polymer type in specific field equipment can be possible.