Leak Testing Properties W. M. Huitt Co（泄漏测试属性w·m·Huitt有限公司）.pdf

P O B o x 3 11 5 4 S t . L o u i s, M O 6 3 1 3 1 - 0 1 5 4 P h o n e : ( 3 1 4 ) 9 6 6 - 8 9 1 9 ~ E – m a i l : w m h u I t t @ a o l . c o m Determining Code Compliance and Pipe System Leak Testing by William M. Huitt (From a paper dated October 4, 2001 in response to leak test questions that were raised on a project) In determining the leak test requirements for piping systems a governing Code needs to be determined. The reason being that leak test requirements vary from Code to Code. In a March 12, 2001 letter I wrote, The difference, and distinction, as to which Code should apply to a particular project lies with the definition and scope of the project itself. If, with respect to a particular project, the design includes only the installation of a refrigeration system, B31.5 would apply. If a projects scope of work consists of an office, laboratory, research facility, or any combination thereof, B31.9 and possibly B31.5 would apply. A laboratory or research facility might also require fluid services beyond the range limits of B31.9. In that case, B31.3 would be adopted for those services only. In the case of a process manufacturing facility, B31.3 would be the governing Code. Since B31.3 covers all piping, B31.5 or B31.9 would not be included, not even necessarily with associated lab, office and research facilities. The only time B31.5 or B31.9 would become governing Codes, in association with a manufacturing facility, is if a refrigeration unit, or an office, lab and/or research facility were under a separate design/construct contract from the process manufacturing facility. Or they were a substantial part of the overall project. As an example, project XYZ consists of