Which specification stipulates that pipelines with a pressure of over 10 MPa cannot use 20# steel?
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Which specification stipulates that pipelines with a pressure of over 10 MPa cannot use 20# steel? It was taught by a trainer for pressure pipeline training, but I couldn’t find the corresponding standards; please advise!
For pipelines in pressure systems with pressures above 10 MPa, 20# steel is used; for higher pressure levels, thick-walled pipes can be employed.
I’ve never seen this before; high pressure doesn’t mean that 20# steel cannot be used – other factors such as the medium and temperature also need to be considered.
Pipelines with a pressure of over 10 MPa should not use 20# as specified in GB8163; instead, GB/T20801 should be referred to. GB8163 cannot be used for GC1.
This post was last edited by *exz on 2009-11-18 13:19. GB8163 is definitely not applicable, but that doesn’t mean steel grade 20# cannot be used. GB 50316-2000 (2008 edition), the Code for Design of Industrial Metal Piping, specifies as follows: 5.2.4 When seamless steel pipes are used in applications with a design pressure of 10 MPa or higher, the inspection requirements for carbon steel and alloy steel pipes shall be no less stringent than those specified in the current standard GB6479, Seamless Steel Pipes for High-Pressure Fertilizer Equipment. The inspection requirements for stainless steel pipes shall be no less stringent than those specified in the current standard GB/T14976, Stainless Steel Seamless Pipes for Fluid Conveyance.