高压燃气管道试压介质转换的分析与建议
Analysis and Suggestions for Medium Conversion of High-pressure Gas Pipeline Pressure Test
石丹阳 1陈赐铭 1左怀梦 1秦康1
作者信息
- 1. 中裕(河南)能源控股有限公司,河南 郑州 450000
- 折叠
摘要
GB/T 51455-2023《城镇燃气输配工程施工及验收标准》规定,在采用水为介质做强度试验后,严密性试验介质宜转换为空气或惰性气体.考察国内外其他标准,并无同类要求.通过对其他标准中严密性试验宜(应)采用空气的适用性范围分析,气体严密性试验主要用于厂站管道,且针对非焊接的密封方式.根据工程实践,对比分析典型的试压事故,总结出抛射物体与裂纹扩展2个主要风险.通过理论计算,证明水作为试压介质在抛射物体与裂纹扩展两方面的安全性远高于空气.提出高压燃气管道严密性试验介质宜与强度试验一致采用水,不需要转换介质的建议.
Abstract
According to Standard for Construc-tion and Acceptance of City Gas Transmission and Dis-tribution Works(GB/T 51455-2023),after conducting strength tests using water as the medium,the tightness test medium should be converted to air or inert gas.There are no similar requirements when examining oth-er domestic and international standards.By analyzing the applicability range of air in the tightness test of oth-er standards,the gas tightness test is mainly used for plant and station pipelines,and for non-welded sealing methods.According to the engineering practice,the typical pressure test accidents are compared and ana-lyzed,and two main risks of projectile and crack propa-gation are summarized.Through the theoretical calcu-lations,it is proved that the safety of water as a pres-sure test medium is much higher than that of air in both projectile and crack propagation.It is suggested that the medium used for the tightness test of high-pressure gas pipelines should be consistent with the strength test using water,without the need for medium conversion.
关键词
高压燃气管道/试压介质转换/强度试验/严密性试验Key words
high-pressure gas pipeline/pres-sure test medium conversion/strength test/tightness test引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据