tailieunhanh - Standard Specification for Seamless and Welded Ferritic Stainless Steel Feedwater Heater Tubes

This specification covers seamless and welded ferritic stainless steel feedwater heater tubes including those bent, if specified, into the form of U-tubes for application in tubular feedwater heaters. | Designation A803 A803M 16 Standard Specification for Seamless and Welded Ferritic Stainless Steel Feedwater Heater Tubes1 This standard is issued under the fixed designation A803 A803M 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. 1. Scope 4. Ordering Information This specification covers seamless and welded ferritic It is the responsibility of the purchaser to specify all stainless steel feedwater heater tubes including those bent if requirements that are necessary for material under this speci- specified into the form of U-tubes for application in tubular fication. Such requirements may include but are not limited to feedwater heaters. the following The tubing sizes covered shall be 5 8 to 1 in. to Quantity length or number of pieces mm inclusive outside diameter and average or minimum wall Material description seamless or welded thicknesses of in. mm and heavier. Dimensions outside diameter wall thickness mini- mum or average wall and length The values stated in either SI units or inch-pound units Grade chemical composition Table 1 and are to be regarded separately as standard. Within the text the U-bend requirements if order specifies bending SI units are shown in brackets. The values stated in each U-bend schedules or drawings shall accompany the order. system may not be exact equivalents therefore each system shall be used independently of the other. Combining values Optional Requirements Purchaser shall specify from the two systems may result in non-conformance with the whether annealing of the U-bends is required or whether tubes standard. are to be hydrotested or air-tested see . Supplementary Requirements Purchaser shall specify 2. .