ASME SA 53 Grade B Carbon Steel Seamless Pipes Ferropipe
In addition to the marking specified in Specification A 999/A 999M, the marking should have the length, an additional symbol -S-, if ASME SA 53 Grade B Carbon Steel Seamless Pipes conforms to any of the Supplementary Requirements S1 to S6, the schedule number of the pipe is ordered to a schedule number viz. SCH 5,10,20,30,40,60 astm a 53 s hs code carbon seamless steel pipe
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