tailieunhanh - Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes

"Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes" 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. | Designation A249 A249M 16a Used in USDOE-NE Standards Standard Specification for Welded Austenitic Steel Boiler Superheater Heat- Exchanger and Condenser Tubes1 This standard is issued under the fixed designation A249 A249M 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 indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the . Department of Defense. 1. Scope The following safety hazards caveat pertains only to the 2 This specification covers nominal-wall-thickness test method described in the Supplementary Requirements of welded tubes and heavily cold worked welded tubes made from this specification. This standard does not purport to address all the austenitic steels listed in Table 1 with various grades of the safety concerns if any associated with its use. It is the intended for such use as boiler superheater heat exchanger or responsibility of the user of this standard to establish appro- condenser tubes. priate safety and health practices and determine the applica- bility of regulatory limitations prior to use. A specific warning Grades TP304H TP309H TP309HCb TP310H statement is given in Supplementary Requirement S7 Note TP310HCb TP316H TP321H TP347H and TP348H are . modifications of Grades TP304 TP309S TP309Cb TP310S TP310Cb TP316 TP321 TP347 and TP348 and are intended 2. Referenced Documents for high-temperature service such as for superheaters and ASTM Standards 3 reheaters. A262 Practices for Detecting Susceptibility to Intergranular The tubing sizes and thicknesses usually furnished to Attack in Austenitic Stainless Steels this specification are 1 8 in. mm in inside diameter to 12 in. A480 A480M Specification for General Requirements for mm in outside diameter and to