1.1 This specification2 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 The tubes are typically used in surface condensers, evaporators, and heat exchangers.
1.3 The product shall be produced of the following coppers or copper alloys, as specified in the ordering information.
| Copper or Copper Alloy | Type of Metal |
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| C10100 | Oxygen-free electronic |
| C10200 | Oxygen-free without residual deoxidants |
| C10300 | Oxygen-free, extra low phosphorus |
| C10800 | Oxygen-free, low phosphorus |
| C12000 | DLP Phosphorized, low residual phosphorus |
| C12200 | DHP, Phosphorized, high residual phosphorus |
| C14200 | DPA Phosphorized arsenical |
| C19200 | Phosphorized, 18201;% iron |
| C23000 | Red Brass |
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