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ASTM A 249/A 249M Document Information:
Title
Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat- Exchanger, and Condenser Tubes
ASTM International
Publication Date:
Mar 1, 2008
Scope:
This specification2 covers nominal-wall-thickness
welded tubes and heavily cold worked welded tubes made from the
austenitic steels listed in Table 1, with various grades intended
for such use as boiler, superheater, heat exchanger, or condenser
tubes.
Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP316H,
TP321H, TP347H, and TP348H are modifications of Grades TP304,
TP309S, TP309Cb, TP310S, TP310Cb, TP316, TP321, TP347, and TP348,
and are intended for high-temperature service such as for
superheaters and reheaters.
The tubing sizes and thicknesses usually furnished to this
specification are 1/8 in. [3.2 mm] in inside
diameter to 12 in. [304.8 mm] in outside diameter and 0.015 to
0.320 in. [0.4 to 8.1 mm], inclusive, in wall thickness. Tubing
having other dimensions may be furnished, provided such tubes
comply with all other requirements of this specification.
Mechanical property requirements do not apply to tubing smaller
than 1/8 in. [3.2 mm] in inside diameter or
0.015 in. [0.4 mm] in thickness.
Optional supplementary requirements are provided and, when one
or more of these are desired, each shall be so stated in the
order.
The values stated in either inch-pound units or SI units are to
be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system are not
exact equivalents; therefore, each system must be used
independently of the other. Combining values from the two systems
may result in nonconformance with the specification. The inch-pound
units shall apply unless the "M" designation of this specification
is specified in the order.
The following safety hazards caveat pertains only to the test
method described in the Supplementary Requirements of this
specification. This standard does not purport to address all of
the safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish
appropriate safety and health practices and determine the
applicability of regulatory limitations prior to use. A
specific warning statement is given in Supplementary Requirement
S7, Note S7.1.
*A Summary of Changes section appears at the end of this
standard.
2 For ASME Boiler and Pressure Vessel Code
applications see related Specification SA-249 in Section II of that
Code.
Keywords:
- austenitic stainless steel
- boiler tubes
- condenser tube
- heat exchanger tube
- high temperature applications
- steel tube
- superheater tubes
- temperature service applications, high
- welded steel tube and heavily cold worked (HCW) tubes
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