What does this mean? Solve it
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PIPE.SMLS.20''(GB/T 8163),SH3405，S-40
Seamless steel pipe, 20 inches (GB/T 8163), SH3405, wall thickness 40
Seamless steel pipe, 20'' (GB/T 8163), SH3405, wall thickness 40
Seamless steel pipe, 20 inches (GB/T 8163), SH3405, wall thickness 40
SH3405: «Steel Pipe Size Series for Petrochemical Enterprises»
PIPE.SMLS seamless steel pipes； 20'' 20 inches ； (GB/T 8163), manufacturing standard ； SH3405, standard dimensions ； S-40 wall thickness: sch40
It might be someone like you, but what he wrote is too brief; it’s not necessarily a series.
Wall thickness: available in both SCH40 and S40 notations
On the flange, s-40 means that the butting thickness is 40; therefore, it’s problematic that it isn’t written out in full in this way.
I can’t understand it. I referred to the answer above; I also tried to learn it, and it’s quite good