Can’t 20# material of 8163 be used for ammonia pipelines? ? Images speak louder than words
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Ammonia is indeed a highly hazardous substance, but the ammonia pipelines I’ve seen seem to be made in accordance with GB/T8163, 20# standard. What’s going on?
"Ammonia is indeed a highly hazardous substance. I was wondering where I read this?
It has been specified as expired in Announcement No. 6 of 2017 regarding the approval and issuance of the GB5044 Standard of the People’s Republic of China. According to GBZ 230-2010 \"Classification of the Hazard Level of Occupational Exposure to Toxic Substances\", ammonia is classified as having moderate hazard. For more details, see \"Interpretation of the Classification of Hazards from Occupational Exposure to Toxic Substances\" _ Xu Haijuan
The regulations are likely referring to the requirements for using steel pipes as connections in pressure vessels, right? They’re not meant for use in fluid pipelines, are they?
It has expired; 8# is the correct answer. Please refer to that
What should I do if I’ve already used it? What material is the right one to use?
This has little to do with the piping field; GB150 mainly sets requirements for the equipment sector. In cold storage facilities that use ammonia for cooling, most of the ammonia pipelines are made of 20# steel, and this has proven to be no problem. Furthermore, in cold regions, gas pipelines often use 20# steel as well, and no problems have arisen.