警告——所有与低温管理和执行相关的人员的注意 泄漏测试是基于这样一个事实，即液氮测试可能是危险的，并且存在 冷凝液氧的危险（火灾/爆炸）、遭受“冷烧伤”和/或 试验过程中可能会产生有害气体（缺氧风险）。机械和操作 在测试元件或结构的施工、测试过程中也可能出现危险 以及测试残留物的处理。应对所有潜在危害和健康风险进行评估 制定并提供安全预防措施。适当的培训和个人 相关人员应配备防护设备。测试实验室负责 进行适当的风险评估，以考虑液体和气体的影响 氮暴露于设备、人员和环境中。本文件描述了一种测定低温泄漏保护装置阻力的方法 （CSP）系统因不导致浸入的加压释放而与低温射流连接 条件适用于CSP系统安装在碳钢上，并与 低温流体。 从压力下运行的工艺设备（例如一些 液化过程利用40至60巴的工作压力）。由于高压排放 低温泄漏保护可能会受到大动量和极端压力的影响 低温。 虽然试验使用液氮作为低温液体，但本文件中描述的试验 代表在6 barg的释放压力下，通过20 mm或更小的孔释放LNG 或更少，基于距离释放点1m的模拟参数。对这次考试的信心正在增强 代表性基于模拟释放的预期动态压力的比较 与根据本文件释放的动态压力进行比较。 在本试验中，覆盖真实环境中发现的所有低温工艺条件是不实际的 植物条件；特别是，该试验不包括可能发生泄漏的高压低温喷射 在制冷回路和液化天然气流中发现- 液化。 液氮被用作低温介质，因为它能够在低温下安全地处理材料 本文件中描述的压力。试验条件在标称8 barg压力下运行。 ISO 20088-1涵盖了低温释放情况，这可能会导致钢结构的聚集条件 由于喷射释放或低压释放LNG或 液氮。ISO 20088-2涵盖了由于喷射释放或低温导致的气相暴露条件 LNG或液氮的压力释放。交叉引用:ISO 20088-1ISO 20088-2ISO 630-1EN 10029ISO 8301ISO 16903ISO 845ISO 22899-1包含以下内容:勘误表，2019年10月

CAUTION — The attention of all persons concerned with managing and carrying out cryogenic spill tests is drawn to the fact that liquid nitrogen testing can be hazardous and that there is a danger of condensing liquid oxygen (fire/explosion), receiving a 'cold burn' and/or the possibility that harmful gases (risk of anoxia) can be evolved during the test. Mechanical and operational hazards can also arise during the construction of the test elements or structures, their testing and disposal of test residues. An assessment of all potential hazards and risks to health shall be made and safety precautions identified and provided. Appropriate training and Personal Protection Equipment shall be given to relevant personnel. The test laboratory is responsible for conducting an appropriate risk assessment in order to consider the impact of liquid and gaseous nitrogen exposure to equipment, personnel and the environment.This document describes a method for determining the resistance of a cryogenic spill protection (CSP) system to a cryogenic jet as a result of a pressurized release which does not result in immersion conditions. It is applicable where CSP systems are installed on carbon steel and will be in contact with cryogenic fluids. A cryogenic jet can be formed upon release from process equipment operating at pressure (e.g. some liquefaction processes utilize 40 to 60 bar operating pressure). Due to high pressure discharge, the cryogenic spillage protection can be compromised by the large momentum combined with extreme cryogenic temperature. Although the test uses liquid nitrogen as the cryogenic liquid, the test described in this document is representative of a release of LNG, through a 20 mm orifice or less, at a release pressure of 6 barg or less, based upon simulated parameters 1 m from the release point. Confidence in this test being representative is based upon a comparison of the expected dynamic pressure of the simulated release in comparison with dynamic pressure from releases in accordance with this document. It is not practical in this test to cover the whole range of cryogenic process conditions found in real plant conditions; in particular the test does not cover high pressure cryogenic jet releases that might be found in refrigeration circuits and in LNG streams immediately post-liquefaction. Liquid nitrogen is used as the cryogenic medium due to the ability to safely handle the material at the pressures described in this document. The test condition is run at nominally 8 barg pressure. ISO 20088-1 covers cryogenic release scenarios which can lead to pooling conditions for steel work protected by cryogenic spill protection as a result of a jet release or low pressure release of LNG or liquid nitrogen. ISO 20088-2 covers vapour phase exposure conditions as a result of a jet release or low pressure release of LNG or liquid nitrogen.Cross References:ISO 20088-1ISO 20088-2ISO 630-1EN 10029ISO 8301ISO 16903ISO 845ISO 22899-1Incorporates the following:Corrigendum, October 2019