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Standard Specification for Copper and Copper-Alloy Seamless Condenser and Heat Exchanger Tubes With Integral Fins
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.
The tubes are typically used in surface condensers, evaporators, and heat exchangers.
The seamless copper and copper alloy tubing shall have the internal or external surface, or both, modified by a cold forming process to produce an integral enhanced surface for improved heat transfer. The tube, after enhancing, shall be supplied in the annealed (O61) or as-fabricated temper. The enhanced sections of tubes in the as-fabricated temper are in the cold-worked condition produced by the fabricating operation.
The unenhanced sections of tubes in the as-fabricated temper are in the temper of the tube prior to enhancing, annealed (O61), or light drawn (H55), and suitable for rolling-in operations.
Samples of annealed-temper (O61) tubes selected for test shall be subjected to microscopical examination and shall show uniform and complete recrystallization.
Grain size and mechanical properties such as tensile strength and yield strength of the alloys shall be determined.
Expansion and flattening tests shall be done to the alloys for performance evaluation.
Non-destructive tests such as:
shall be done as well.
1.1 This specification2 covers 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 |
Type of Metal |
|
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 (See Note 1) |
|
C15630 |
Nickel Phosphorus |
|
C19200 |
Phosphorized, 1 % iron |
|
C23000 |
Red Brass |
|
C44300 |
Admiralty Metal Types B, |
|
C44400 |
C, and |
|
C44550 |
D |
|
C60800 |
Aluminum Bronze |
|
C68700 |
Aluminum Brass Type B |
|
C70400 |
95-5 Copper-Nickel |
|
C70600 |
90-10 Copper-Nickel |
|
C70620 |
90-10 Copper-Nickel (Modified for Welding) |
|
C71000 |
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