ASTM B956-07 - 1.10.2007
 
1. Scope

1.1 This specification establishes the requirements for heat exchanger tubes manufactured from forge-welded copper and copper alloy tubing in straight lengths on which the external or internal surface, or both, has been modified by cold forming process to produce an integral enhanced surface for improved heat transfer.

1.2 UnitsThe values stated in either inch-pounds 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.

Note 1

Designations listed in Classification B 224.

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.

 
2. Referenced Documents

E54-80(1996)

Standard Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)

E62-89(1996)

Standard Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)

B153-22

Standard Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing

E53-07

Standard Test Method for Determination of Copper in Unalloyed Copper by Gravimetry

E29-22

Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

E8-04

Standard Test Methods for Tension Testing of Metallic Materials

B858-06(2024)

Standard Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys

B846-24

Standard Terminology for Copper and Copper Alloys

B601-24

Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast

B543-07

Standard Specification for Welded Copper and Copper-Alloy Heat Exchanger Tube

B224-16(2022)

Standard Classification of Coppers

E527-23

Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

E478-24

Standard Test Methods for Chemical Analysis of Copper Alloys

E112-25e1

Standard Test Methods for Determining Average Grain Size (Includes all amendments and changes 9/9/2026).

E255-23

Standard Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition

E243-24

Standard Practice for Electromagnetic (Eddy Current) Examination of Copper and Copper-Alloy Tubes

E118-89(1996)

Standard Test Methods for Chemical Analysis of Copper-Chromium Alloys

B154-16(2022)

Standard Test Method for Mercurous Nitrate Test for Copper Alloys