ASME SA-179 SA-179M-2021 pdf free.Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger
and Condenser Tubes.
1. Scope 1.1 This specification covers minimum-wall-thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus. 1.2 This specification covers tubes 1 ⁄ 8 to 3 in. [3.2 to 76.2 mm], inclusive, in outside diameter. N OTE 1—Tubing smaller in outside diameter and having a thinner wall than indicated in this specification is available. Mechanical property requirements do not apply to tubing smaller than 1 ⁄ 8 in. [3.2 mm] in outside diameter or with a wall thickness under 0.015 in. [0.4 mm]. 1.3 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 ofthe other. Combining values from the two systems may result in nonconformance with the specifi- cation. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
2. Referenced Documents 2.1 ASTM Standards: A450/A450M Specification for General Requirements for Carbon and Low Alloy Steel Tubes
3. Ordering Information 3.1 Orders for material under this specification should include the following, as required, to describe the desired material adequately: 3.1.1 Quantity (feet, metres, or number of lengths), 3.1.2 Name of material (seamless tubes), 3.1.3 Manufacture (cold-drawn),
3.1.4 Size (outside diameter and minimum wall thickness), 3.1.5 Length (specific or random), 3.1.6 Optional requirements (product analysis, Section 9, flange test, 11.3), 3.1.7 Test report required (Certification Section of Specifi- cation A450/A450M), 3.1.8 Specification number, and 3.1.9 Special requirements.
4. General Requirements 4.1 Material furnished under this specification shall con- form to the applicable requirements of the current edition of Specification A450/A450M, unless otherwise provided herein.
5. Manufacture 5.1 Tubes shall be made by the seamless process and shall be cold drawn.
6. Heat Treatment 6.1 Tubes shall be heat treated after the final cold draw pass at a temperature of 1200°F [650°C] or higher.
7. Surface Condition 7.1 Finished tubes shall be free of scale. A slight amount of oxidation will not be considered as scale.
8. Chemical Composition 8.1 The steel shall conform to the following requirements as to chemical composition: Carbon, % 0.06–0.18 Manganese, % 0.27–0.63 Phosphorus, max, % 0.035 Sulfur, max, % 0.035 8.2 Supplying an alloy grade that specifically requires the addition of any element other than those listed in 8.1 is not permitted.
9. Product Analysis 9.1 When requested on the purchase order, a product analy- sis shall be made by the supplier from 1 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.ASME SA-179 SA-179M pdf download.