1.1 本规程提供了标准化的样品对接熔合制备、调节和试验条件，用于根据以下要求对样品对接熔合接头制备的样品进行拉伸试验或对样品对接熔焊接头进行水压试验: 1.1.1 试验方法 D638型 ，张力测试； 1.1.1.1 试验方法以外的拉伸试样的制备或使用 D638型 I型至V型超出了本规程的范围。 1.1.2 试验方法 1598年 ，恒定（持续）液压试验； 1.1.3 试验方法 1599年 ，短期液压测试。 1.1.4 本规程不包括聚乙烯以外的塑料材料或其他对接熔合试验。排除其他塑料材料和其他试验并不意味着其他塑料材料适合或不适合对接熔合，或本文所引用的试验对于定性表征和对接熔合接头的研究和开发是足够或不充分的，或其他试验对于此类目的的效用不小、相等或更大。 1.1.5 测试结果的评估和测试结果评估标准的确定不在本规程的范围内。本规程仅限于标准对接熔合试样和测试条件，用于比较多方的测试数据。 1.1.6 以英寸-磅单位表示的值应视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准值。 1.1.7 在本标准中，括号中的文本、标准正文中的注释和附录是信息性的，非强制性的。对于标准正文中的表格，表格注释是强制性的。 1.2 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。 1.3 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 本规程规定了试样对接熔合的标准化制备、试样对接熔合试样的制备以及根据试验方法进行的试验条件的要求 D638型 ，测试方法 1598年 或测试方法 1599年 本实践旨在提高可靠比较多方测试结果的能力。

1.1 This practice provides standardized sample butt fusion preparation, conditioning, and testing conditions for tension testing of specimens prepared from sample butt fusion joints or hydrostatic tests of sample butt fusion joints in accordance with: 1.1.1 Test Method D638 , tension testing; 1.1.1.1 The preparation or use of tensile specimens other than Test Method D638 Type I through Type V is beyond the scope of this practice. 1.1.2 Test Method D1598 , constant (sustained) hydraulic pressure testing; 1.1.3 Test Method D1599 , short-term hydraulic pressure testing. 1.1.4 It is not within the scope of this practice to include plastic materials other than polyethylene or other tests for butt fusions. The exclusion of other plastic materials and other tests does not imply that other plastic materials are suitable or unsuitable for butt fusion, or that the tests cited herein are adequate or inadequate for qualitative characterization and for research and development of butt fusion joints, or that other tests do not have lesser, equal, or greater utility for such purpose. 1.1.5 The evaluation of test results and the determination of test result evaluation criteria are not within the scope of this practice. This practice is limited to standardized butt fusion test specimens and testing conditions for the comparison of test data from multiple parties. 1.1.6 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. 1.1.7 In this standard, text in parentheses, notes in the body of the standard and appendices are informational and non-mandatory. For tables in the body of the standard, table notes are mandatory. 1.2 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. 1.3 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 This practice provides requirements for standardized preparation of sample butt fusions, preparation of specimens from sample butt fusions, and conditioning for testing in accordance with Test Method D638 , Test Method D1598 , or Test Method D1599 . This practice is intended to improve the ability to reliably compare test results from multiple parties.