a Labels are for information and assistance in ordering.
b Nominal linear masses, threaded and coupled (col. 2) are shown for information only.
c The densities of martensitic chromium steels (L80 types 9Cr and 13Cr) are different from carbon steels. The masses shown are therefore not accurate
for martensitic chromium steels. A mass correction factor of 0,989 may be used.