1.1 这种做法是通过在垫片承受越来越大的压缩载荷直到达到目标载荷时测量垫片挠度来测量垫片材料的压缩性能。在测试期间，以规定的加载速率记录负载和厚度变化，作为时间的函数。 1.2 当使用0.1 MPa/s[14.5 psi/s]时，除膨胀聚四氟乙烯（PTFE）、弹性体和软木/弹性体垫片外，所有类型的垫片的建议加载速率为0.5 MPa/s[72.52 psi/s]。 1.3 进行A部分测试，通过测量垫片厚度来测量垫片材料的压缩性能，同时承受越来越大的压缩载荷，直到达到目标载荷。 该测试在室温下进行，但如果需要或生产商和用户同意，也可以在高温下进行。 1.4 可以进行B部分测试，通过测量垫片厚度来测量垫片材料的压缩性能，同时对其施加越来越大的压缩载荷，包括一个或多个顺序，其中垫片被卸载，然后恢复压缩载荷，直到达到目标载荷。卸载速率与装载速率相同，除非需要不同的装载和卸载速率或生产商和用户达成一致。该测试在室温下进行，但如果需要或生产商和用户同意，也可以在高温下进行。 1.5 A和B部分的测试参数，包括垫片材料类型、垫片尺寸、压板类型（RF或FF）、目标载荷、加载时间、测试期间使用的记录间隔、加载和卸载速率以及温度，都将与结果一起报告。 1.6 单位-- 以国际单位制或英寸-磅单位表示的值应单独视为标准值。每个系统中所述的值不一定是完全等效的；因此，为确保符合标准，每个系统应独立使用，两个系统的值不得组合。 1.7 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。 1.8 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 垫片材料的负载与厚度特性是选择特定密封应用中使用的给定材料的重要因素。 此外，压缩/加载行为数据是用户的常见请求。该测试允许在室温或高温或两者下对材料进行比较。此外，可以在室温或高温或两者下装载和卸载材料时评估性能。该测试方法的重要性部分基于这样一个假设，即如果材料在室温或高温下表现出过多的压缩，它将不再像密封件那样有效。这些结果可用于某些法兰设计方法，以表征设计特性，如有限元分析（FEA）。这些结果可用于根据现场测量的垫片压缩来确认足够的装配载荷。 可以比较两种或多种材料，以确定其压缩性能的差异。为了质量保证，可以将材料样品与既定标准或先前确定的同一材料原始批次的特征进行比较。 5.2 如果需要，可以使用中所述的凸形法兰、插入件或校准环对样品进行测试 6.3 和 图1 使得面积（2042毫米 2. [3.18英寸。 2. ])在测试期间保持不变。

1.1 This practice measures the compression properties of a gasket material by measuring gasket deflection while it is subjected to an increasing compressive load until a target load is reached. The load and change in thickness are recorded at a defined loading rate as a function of time for the duration of the test. 1.2 Suggested loading rates are 0.5 MPa/s [72.52 psi/s] for all types of gaskets except for expanded polytetrafluoroethylene (PTFE), elastomer, and cork/elastomer gaskets when 0.1 MPa/s [14.5 psi/s] is used. 1.3 The Part A test is performed that measures the compression properties of a gasket material by measuring gasket thickness while it is subjected to an increasing compressive load until a target load is reached. This test is performed at room temperature but may be performed at an elevated temperature if desired or when agreed upon by producer and user. 1.4 The Part B test may be performed that measures the compression properties of a gasket material by measuring gasket thickness while it is subjected to increasing compressive loads that includes a sequence or sequences in which the gasket is unloaded followed by a resumption of the compressive load until a target load is reached. The unloading rate is the same as the loading rate unless different loading and unloading rates are desired or when agreed upon by producer and user. This test is performed at room temperature but may be performed at an elevated temperature if desired or when agreed upon by producer and user. 1.5 The testing parameters for both Parts A and B including the gasket material type, gasket dimensions, platen type (RF or FF), target load, loading time, recording interval used during the test, loading and unloading rates, and temperature are to be reported with the results. 1.6 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.7 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. 1.8 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 load versus thickness properties of a gasket material are an important factor with regard to the selection of a given material for use in a particular sealing application. Additionally, compression/load behavior data are a common request from users. The test allows comparison of materials at room temperature or elevated temperatures or both. Additionally, properties can be evaluated while loading and unloading the material at room temperature or elevated temperatures or both. The significance of the test method is based, in part, on the assumption that, if a material exhibits too much compression at either room temperatures or elevated temperatures, it will no longer function as effectively as a seal. The results may be used in certain flange design methods to characterize properties for design such as finite element analysis (FEA). The results may be used to confirm adequate assembly loading based on measured gasket compression in the field. Two or more materials can be compared to determine differences in their compression properties. A sample of material can be compared to an established standard or previously determined characteristics on original lots of the same material for quality assurance purposes. 5.2 If desired, samples may be tested with a raised profile flange, insert, or calibration ring described in 6.3 and Fig. 1 so that the area (2042 mm 2 [3.18 in. 2 ]) remains constant during the test.