1.1 本试验方法描述了通过评估接头约束产品在循环压力试验和静压试验期间对PVC管道性能特性的影响，来鉴定PVC压力管道系统上使用的接头约束产品性能的程序。本试验方法中引用的PVC管性能值适用于规范中所述的12454化合物 D1784 根据试验方法中的表1对LTH进行分类，得到4000 HDB D2837 . 这包括但不限于根据以下标准生产的管道: 规格 D1785 和 D2241 和AWWA C900。 1.2 本试验方法确定了PVC管道上接头约束产品的短期性能，其中包括根据管道的最小爆裂压力要求对约束接头试验段进行试验，以确定快速爆裂性能。 1.3 本试验方法确定了接头约束产品对PVC管道的长期影响，其中包括对约束接头试验段进行1000小时的管道持续压力要求试验。 1.4 本试验方法涉及在所用PVC管的全压容量下额定的约束产品。 有可用的接头约束装置未在管道的全压容量下额定。虽然这些产品在市场上已被证明是可接受和有用的，但该测试方法不适用于这些产品。 1.5 本试验方法确定了承受循环压力冲击的PVC管上接头约束产品的性能。该性能与Herbert W.Vinson建立的无接头约束产品管道的基线性能进行了比较。 2. 1.6 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.7 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。 1.8 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 该试验方法有助于确定接头约束产品对PVC压力管性能的任何影响。本试验方法的设计是为了使试验的所有三个部分的成功提供合理的保证，即接头约束产品可以在PVC管道的全压力额定值和容量下使用。 4.2 约束接头试样应承受等于管道单独最小爆破压力要求的内部压力。一些常见尺寸比的最小爆破压力要求如所示 表1 . 由12454 PVC化合物生产的管道（即符合规范的管道）的其他尺寸比的最小爆破压力 D1785 )可根据6400 psi（44.13 MPa）的环向应力确定。 （A） 列出的压力近似于6400 psi（44.13 MPa）的环向应力。为了简化试验，对试验压力进行了一些微调，以保持试验压力均匀。 4.3 在持续压力要求下对约束接头试样进行1000小时的测试，表明约束长期内有失效的趋势。一些常见尺寸比的最小持续压力要求如所示 表2 . 由12454 PVC化合物生产的管道的其他尺寸比的最小持续压力（例如，符合规范的管道 D1785 )可根据4200 psi（28.96 MPa）的环向应力确定。 （A） 列出的压力近似于4200 psi（28.96 MPa）的环向应力。为了简化试验，对试验压力进行了一些微调，以保持试验压力均匀。 4.4 约束接头试样的循环冲击压力试验确定了接头约束产品对PVC管循环疲劳寿命的影响。该试验方法提供了一种快速识别接头约束产品和管道组合可能导致的任何性能降低的方法。 应根据文森方程确定管道的峰值环向应力，周期为1 000 000次循环。基础压力应为峰值压力的一半。一些常见尺寸比的峰值压力要求如所示 表3 . 由12454 PVC化合物生产的管道的其他尺寸比的峰值压力（例如，符合规范的管道 D1785 )可根据1587 psi（10.94 MPa）的环向应力确定。 （A） 列出的峰值压力近似于1587 psi（10.94 MPa）的峰值环向应力。

1.1 This test method describes a procedure for qualifying the performance of joint restraint products for use on PVC pressure pipe systems by evaluating the effect of the joint restraint product on the performance characteristics of PVC pipe during cyclic pressure tests and static pressure tests. The PVC pipe property values referenced in this test method are for the 12454 compound as described in Specification D1784 and a 4,000 HDB shall be obtained by categorizing the LTHS in accordance with Table 1 in Test Method D2837 . That includes, but is not limited to, pipe produced in accordance with the following standards: Specifications D1785 and D2241 , and AWWA C900. 1.2 This test method determines the short-term performance of a joint restraint product on PVC pipe, which involves the testing of restrained joint test sections to the minimum burst pressure requirements of the pipe to determine quick burst performance. 1.3 This test method determines the long-term effect of a joint restraint product on PVC pipe, which involves the testing of restrained joint test sections to the sustained pressure requirements of the pipe for a period of 1000 h. 1.4 This test method addresses restraint products that are rated at the full pressure capacity of the PVC pipe on which they are used. There are joint restraint devices available that are not rated at the full pressure capacity of the pipe. While those products have proven acceptable and useful in the marketplace, this test method does not apply to those products. 1.5 This test method determines the performance of a joint restraint product on PVC pipe subjected to cyclic pressure surges. The performance is compared to the baseline performance of pipe without joint restraint products established by Herbert W. Vinson. 2 1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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 ====== 4.1 This test method is useful for establishing any effects that a joint restraint product has on the performance of PVC pressure pipe. This test method is designed so that success in all three parts of the test provides reasonable assurance that a joint restraint product may be used on PVC pipe at the full pressure rating and capacity of the pipe. 4.2 Restrained joint test specimens shall be subjected to internal pressures that are equal to the minimum burst pressure requirements for the pipe alone. The minimum burst pressure requirements for some common dimension ratios are shown in Table 1 . The minimum burst pressures for other dimension ratios of pipe produced from 12454 PVC Compound (that is, pipe conforming to Specification D1785 ) may be determined based on a hoop stress of 6400 psi (44.13 MPa). (A) The pressures listed approximate a hoop stress of 6400 psi (44.13 MPa). Some minor adjustments have been made to keep the test pressures uniform in order to simplify testing. 4.3 Testing of restrained joint test specimens for 1000 h at the sustained pressure requirements indicates any tendency of the restraint to fail in the long term. The minimum sustained pressure requirements for some common dimension ratios are shown in Table 2 . The minimum sustained pressure for other dimension ratios of pipe produced from 12454 PVC Compound (for example, pipe conforming to Specification D1785 ) may be determined based on a hoop stress of 4200 psi (28.96 MPa). (A) The pressures listed approximate a hoop stress of 4200 psi (28.96 MPa). Some minor adjustments have been made to keep the test pressures uniform in order to simplify testing. 4.4 A cyclic surge pressure test of restrained joint test specimens determines the effect of the joint restraint product on the cyclic fatigue life of PVC pipe. This test method provides a means for quickly identifying any reduction in performance that might result from the combination of the joint restraint product and the pipe. The peak hoop stress shall be determined for the pipe based on the Vinson equation for a period of 1 000 000 cycles. The base pressure shall be one half of the peak pressure. The peak pressure requirements for some common dimension ratios are shown in Table 3 . The peak pressure for other dimension ratios for pipe produced from 12454 PVC Compound (for example, pipe conforming to Specification D1785 ) may be determined based on a hoop stress of 1587 psi (10.94 MPa). (A) The peak pressures listed approximate a peak hoop stress of 1587 psi (10.94 MPa).