关于ASME B31.3管道试压对水质的要求

zw810520

ASME B31.3管道试压对水质有些啥子要求？

zgxuezhe

zw810520 发表于 2017-4-15 13:42
感谢帮助，但是除了对敏感的微生物腐蚀外，对水中氯离子和PH值等有要求吗？

目前在ASME B31.3-2016中的表述是：
【The fluid shall be water unless there is the possibility of damage due to freezing or to adverse effects of water on the piping or the process. In that case another suitable nontoxic liquid may be used. If the liquid is flammable, its flash point shall be at least 49°C , and consideration shall be given to the test environment.
   Consideration should be given to susceptibility to microbiologically influenced corrosion (MIC). This condition is especially prevalent in noflow, high moisture environments. Internal MIC may also depend on the characteristics of the treated or untreated test fluid. Internal MIC may be lessened or possibly eliminated by properly draining and drying systems and/or by proper selection of test fluid.】并未专门提及氯离子浓度及PH值要求。
但是在ASME B31.1-2016中的表述是：
【Water shall normally be used as the test medium unless otherwise specified by the owner. Test water shall be clean and shall be of such quality as to minimize corrosion of the materials in the piping system.
     Equipment fabricated from austenitic (300 series) and ferritic (400 series) stainless steels and requiring hydrostatic testing should be tested with deionized water,high purity steam condensate, or potable water（Potable water in this context follows U.S. practice, with 250 parts per million maximum chloride content, sanitized with chlorine or ozone.）, indecreasing order of preference.
After testing is completed, equipment should be thoroughly drained with all high point vents open during draining, and dried by air blowing, swabbing, or other appropriate means. If immediate draining and drying are not possible, hydrotest water should be circulated in the piping for at least one hour daily to reduce the possibility of pitting and microbiologically influenced corrosion.】这里面的表述相对就要要求严一些，对不锈钢材质管道提出了明确的要求。
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      从以上两个标准的表述可以看出：无论哪个规范，选用试压介质的核心还是介质对管道设备的材质及周边环境的影响，而且即便有些介质（比如水质要求不合格）对材质有一定的影响，只要试压完成后我们及时排净，及时滤干，也是可以接受的.
       同时，根据目前我的经验，一般大型工程技术公司在设计文件中或者技术咨询文件中，对于有试压介质要求的管道类别及介质要求会明确指出。
      所以，我个人认为这个水的一般选择顺序是：脱盐水>洁净水（根据氯离子浓度分为几个等级）>自来水.
PS:希望大家提出意见，深入探讨，踊跃交流，共同进步。

wuqitao0000

谁熟知：ASME B31.3管道试压对水质有些啥子要求？

ZZCSJV

至少氯离子是要控制的

zgxuezhe

Hydrostatic Leak Test Fluid:  Consideration should be given to susceptibility to microbiologically influenced corrosion (MIC).

zw810520

感谢

Hydrostatic Leak Test Fluid:  Consideration should be given to susceptibility to microbiologically influenced corrosion (MIC).

帮助，但是除了对敏感的微生物腐蚀外，对水中氯离子和PH值等有要求吗？

safetyvalves

学习了！

122哈哈哈

xuexidao新知识了哈哈

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