The steel shall be homogeneous as shown by etching
tests conducted in accordance with the appropriate portions
of Method E 381. Etching tests shall be made on a cross
section from one end or both ends of each p,ipe and shall
show sound and reasonably uniform material free of injuribus
laminations, ,cracks, and similar objectionable defects.
If this supplementary requirement is specified, the number of
tests per pipe required' shall also .be specified. If a specimen
from any length shows objection~ble defects, the length shall
be rejected, subject to re)J1oval- of tne defective end and
subseq)Jent retests indicating the remainder of the length to
be sound and reasonably uniform material.