ASME SA-214-SA-214M-2021 pdf free.ELECTRIC-RESISTANCE- WELDED CARBON STEEL HEAT-EXCHANGER AND CONDENSER TUBES.
1. Scope 1.1 This specification covers minimum-wall-thickness, electric-resistance-welded, carbon steel tubes to be used for heat exchangers, condensers, and similar heat-transfer apparatus. 1.2 The tubing sizes usually furnished to this specifica- tion are to 3 in. [76.2 mm] in outside diameter, inclusive. Tubing having other dimensions may be furnished, pro- vided such tubes comply with all other requirements of this specification. 1.3 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. 1.4 The purchaser shall specify in the order the outside diameterand minimumwall thickness. The inside diameter shall not be specified. 1.5 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 systemmustbe usedindependentlyofthe other. Combining values fromthe two systems may resultin nonconformance with the specification. The inch-pound units shall apply unless the “M” designation ofthis specification is specified in the order.
2. Referenced Document 2.1 ASTM Standard: A 450/A 450M Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes
3. General Requirements 3.1 Material furnished under this specification shall conform to the applicable requirements of the current edi- tion ofSpecification A 450/A 450M, unless otherwise pro- vided herein.
4. Ordering Information 4.1 Orders for material under this specification should include the following, as required, to describe the desired material adequately: 4.1.1 Quantity (feet, metres, or number of lengths), 4.1.2 Name of material (electric-resistance-welded tubes), 4.1.3 Size (outside diameter and minimum wall thickness), 4.1.4 Length (specific or random), 4.1.5 Optional requirements (Section 8 and 10.5), 4.1.6 Test report required (see Certification Section of Specification A 450/A 450M), 4.1.7 Specification designation, and 4.1.8 Special requirements.
5. Manufacture 5.1 Tubes shall be made by electric-resistance welding.
6. Heat Treatment 6.1 After welding, all tubes shall be heat treated at a temperature of 1650°F [900°C] or higher and followed by cooling in air or in the cooling chamber of a controlled atmosphere furnace. Cold drawn tubes shall be heat treated after the final cold-draw pass at a temperature of 1200°F [650°C] or higher.
8. Product Analysis 8.1 When requested on the purchase order, a product analysis shall be made by the supplier from one tube per 250 pieces; or when tubes are identified by heat, one tube per heat shall be analyzed. The chemical composition thus determined shall conform to the requirements specified. 8.2 If the original test for product analysis fails, retests oftwo additional lengths of flat-rolled stock, or tubes shall be made. Both retests, for the elements in question shall meet the requirements of the specification; otherwise all remaining material in the heatorlot(Note) shall be rejected or, at the option of the producer, each length of flat-rolled stock or tube may be individually tested for acceptance. Lengths of flat-rolled stock or tubes which do not meet the requirements of the specification shall be rejected. NOTE — A lot consists of 250 tubes.
9. Hardness Requirements 9.1 The tubes shall have a hardness number not exceeding 72 HRB.ASME SA-214-SA-214M pdf download.