Issues with the use of Q345 material
Thread Content
Can the seamless steel pipes of grades Q345A, Q345B, Q345C, Q345D, and Q345E specified in GB/T8163-2018 be used in containers and pressure pipelines?
See GB150.2-2011, Clause 5.1.3
Q235A has been prohibited from being used in the manufacture of primary pressure-bearing components since 2011. GB150-2011 also imposes strict requirements on the 235 series materials above Q235B.
The previously used Q235A equipment should also be phased out immediately.
It can be used, but there are limitations.
Take a look at what’s said on the second floor; it’s very clear.
Q345A should be removed; for pressure vessels, Q345R is the better choice.
Q235A has been removed; I made the same mistake as you!
For pressure vessels classified as such, special attention must be paid to whether the S and P contents of the aforementioned piping materials meet the requirements specified in TSG21. We do not use the nozzles specified in the GB/T8163 standard when designing pressure vessels.
You need to specify under what design conditions it will be used – whether for containers or pipelines – as regulations vary across different industries in China