This standard is issued under the fixed designation A 851; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon ( ュ) indicates an editorial change since the last revision or reapproval.

1.Scope

1.1 This specification covers nominal-wall-thickness tubes intended for use as steam surface condenser tubes. These tubes are made from the austeitic steels listed in Table1 using a high-frequency induction welding process here post-weld solution heat treatment is not necessary for corrosion resistance.
1.2 The tubing sizes covered shall be 5/8 to in. (15.9 mm) to 3 1/8 in.(79.4 mm) in outside diameter and 0.015 to 0.019 in. (0.40 to 2.8 mm), inclusive, in wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.
1.3 Optional supplementary requirements are provided in this spcification and, when one or ore of these are desired, each shall be so states in the order.
1.4 The values stated in inch-pound units are to be regarded as the standard.