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1.1 This specification establishes the requirements for seamless copper and copper alloy tubing on which the external or internal surface, or both, has been modified by a cold-forming process to produce an integral enhanced surface for improved heat transfer.

1.2 UnitsThe values stated in either in-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems could result in nonconformance with the specification.

1.3 The tubes are typically used in surface condensers, evaporators, and heat exchangers.

1.4 The product shall be produced of the following coppers or copper alloys, as specified in the ordering information.

Copper or Copper Alloy UNS No.Type of MetalC10100Oxygen-free electronicC10200Oxygen-free without residual deoxidantsC10300Oxygen-free, extra low phosphorusC10800Oxygen-free, low phosphorusC12000DLP Phosphorized, low residual phosphorus (See Note 1)C12200DHP, Phosphorized, high residual phosphorus (See NOTE 1)C14200DPA Phosphorized arsenical (See NOTE 1)C19200Phosphorized, 1 % ironC23000Red BrassC44300Admiralty Metal Types B,C44400C, andC44550DC60800Aluminum BronzeC68700Aluminum Brass Type BC7040095-5 Copper-NickelC7060090-10 Copper-NickelC7062090-10 Copper-Nickel (Modified for Welding)C7100080-20 Copper-Nickel Type AC7150070-30 Copper-NickelC7152070-30 Copper-Nickel (Modified for Welding)C72200Copper-Nickel

Note 1—Designations listed in Classification B 224.

1.5 The following safety hazard caveat pertains only to the test methods described in 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.

1.6 Product produced in accordance with the Supplementary Requirements section for military applications shall be produced only to the inch-pound system of this specification.