ASTM B956 / B956M - 10e1

    Standard Specification for Welded Copper and Copper-Alloy Condenser and Heat Exchanger Tubes with Integral Fins

    Active Standard ASTM B956 / B956M | Developed by Subcommittee: B05.04

    Book of Standards Volume: 02.01


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    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 Units—The values stated in either inch-pounds units or SI units are to be regarded separately as the standard. 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 non-conformance with the specification.

    1.2.1 Within the text, the SI units are shown in brackets.

    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 1Designations listed in Classification B224.

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing

    B154 Test Method for Mercurous Nitrate Test for Copper Alloys

    B224 Classification of Coppers

    B543 Specification for Welded Copper and Copper-Alloy Heat Exchanger Tube

    B601 Classification for Temper Designations for Copper and Copper Alloys--Wrought and Cast

    B846 Terminology for Copper and Copper Alloys

    B858 Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys

    E8 Test Methods for Tension Testing of Metallic Materials

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E53 Test Method for Determination of Copper in Unalloyed Copper by Gravimetry

    E54 Test Methods for Chemical Analysis of Special Brasses and Bronzes

    E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)

    E112 Test Methods for Determining Average Grain Size

    E118 Test Methods for Chemical Analysis of Copper-Chromium Alloys

    E243 Practice for Electromagnetic (Eddy-Current) Examination of Copper and Copper-Alloy Tubes

    E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition

    E478 Test Methods for Chemical Analysis of Copper Alloys

    E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)


    ICS Code

    ICS Number Code 27.060.30 (Boilers and heat exchangers)

    UNSPSC Code

    UNSPSC Code 40101802(Heat exchangers); 40181500(Welded copper tubes)


    DOI: 10.1520/B0956_B0956M

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