本文件描述了一种确定低温泄漏保护（CSP）系统对低温喷射阻力的方法，该阻力是由于加压释放而产生的，不会导致浸入条件。适用于CSP系统安装在碳钢上，并与低温流体接触的情况。 从压力下运行的工艺设备中释放时，可以形成低温射流（例如，一些液化工艺使用40至60巴的工作压力）。由于高压排放，大动量加上极端低温，低温泄漏保护可能会受到影响。 尽管该试验使用液氮作为低温液体，但本文件中描述的试验代表了在6 barg或更低的释放压力下，通过20 mm或更小的孔释放LNG，基于距离释放点1 m的模拟参数。根据本文件，将模拟释放的预期动态压力与释放的动态压力进行比较，从而得出本试验具有代表性的置信度。 在本试验中，覆盖在实际工厂条件下发现的所有低温工艺条件是不实际的； 特别是，该试验不包括在制冷回路和液化后立即在LNG流中发现的高压低温喷射释放。 液氮被用作低温介质，因为它能够在本文件所述的压力下安全处理材料。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，由于LNG或液氮的喷射释放或低压释放，可能会导致受低温泄漏保护的钢结构出现池状条件。 ISO 20088-2涵盖了LNG或液氮喷射释放或低压释放导致的气相暴露条件。

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.