标准摘要
[中文适用范围]： ISO 15859 的这一部分规定了氦成分的限值，并制定了适用于氦成分验证的采样和测试要求。 ISO 15859 的本部分适用于以下类型和等级的飞行硬件和地面设施、系统和设备中使用的氦气。 — Ⅰ型：气态 — A级：吹扫加压氦气； ——F级：吹扫加压氦气； ——J级：吹扫加压氦气； ——Ⅱ型：液体 — A级：吹扫加压氦气； ——F 级：吹扫和加压氦气。 ISO 15859 的这一部分仅适用于此处指定限值内的流入物。 ISO 15859 的这一部分适用于任何所需的采样操作，以确保当流体进入运载火箭或航天器时，流体成分符合下文提供的限制或符合针对特定用途商定的任何技术规范。 [外文原描述]： ISO 15859-4:2004 specifies limits for the composition of helium and establishes the sampling and test requirements applicable for the verification of the helium composition. ISO 15859-4:2004 is applicable to helium, used in both flight hardware and ground facilities, systems and equipment, of the following types and grades:Type I, gaseous (Grade A: purging and pressurizing helium, Grade F: purging and pressurizing helium, Grade J: purging and pressurizing helium) and Type II, liquid (Grade A: purging and pressurizing helium, Grade F: purging and pressurizing helium). ISO 15859-4:2004 is applicable to influents only within the specified limits. ISO 15859-4:2004 is applicable to any sampling operation required to ensure that, when the fluid enters the launch vehicle or spacecraft, the fluid composition complies with the limits provided hereafter or with any technical specification agreed to for a particular use.
英文名称Space systems — Fluid characteristics, sampling and test methods — Part 4: Helium