標準號：ISO 15859-4-2004
中文標準名稱：航天系統.流動特性、取樣和試驗方法.第4部分:氦
英文標準名稱：Space systems - Fluid characteristics, sampling and test methods - Part 4: Helium
標準類型：V04
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：V04
國際標準分類號：49.140
適用范圍：This part of ISO 15859 specifies limits for the composition of helium and establishes the sampling and test requirements applicable for the verification of the helium composition. This part of ISO 15859 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; — Type Ⅱ: liquid — Grade A: purging and pressurizing helium; — Grade F: purging and pressurizing helium. This part of ISO 15859 is applicable to influents only within the specified limits herein. This part of ISO 15859 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.