GB5030079007304318030
STEEL PIPE, USED IN THE ASSEMBLY OF SLEEVES
SEAMLESS, OF CIRCULAR CROSS SECTION
COLD DRAWN/COLD ROLLED, NON ALLOY STEEL.
WITH AN EXTERNAL DIAMETER OF 7.13 INCHES (181 MM)
LENGTH 21 INCHES (533 MM)
WITH A CEV (CARBON EQUIVALENT VALUE) NOT EXCEEDING 0.85