ASTM A335 Pipe,ASTM A335 chrome moly pipe
Sometimes referred to as "P Grade", chome moly pipe is popular in P-Grades P5, P9, P11, P22, and P91. ASTM A335 standard is issued under the fixed designation A 335/A 335M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. ...