ASTM B903 Standard Specification for Seamless Copper Heat Exchanger Tubes With Internal Enhancement

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ASTM B903 Standard Specification for Seamless Copper Heat Exchanger Tubes With Internal Enhancement
This specification covers seamless, internally enhanced copper tube, in straight lengths or coils, suitable for use in refrigeration and air-conditioning products or other heat exchangers. The material of manufacture shall be cast billet, bar, tube, or so forth of copper UNS No. C12200 and shall be of such purity and soundness as to be suitable for processing into the tubular product described. The tube shall be manufactured by such hot- and cold-working processes needed to produce a homogenous, uniform wrought structure in the finished product. The material shall conform to the chemical composition requirements specified. The grain size shall be determined in the wall beneath the ridges. The microstructure shall show complete recrystallization and shall have an average grain size within the limits specified. As-fabricated and O (annealed) temper tube shall conform to the mechanical properties specified. The specimens of annealed product shall withstand the specified expansion tested as specified. Each tube shall be subjected to an eddy-current test. Tubes shall be tested normally in the fabricated temper; however, they may be tested in the annealed temper at the option of the manufacturer.
1. Scope
1.1 This specification establishes the requirements for seamless, internally enhanced copper tube, in straight lengths or coils, suitable for use in refrigeration and air-conditioning products or other heat exchangers. 1.2 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 Tubes for this application are manufactured from the following copper: Copper UNS No. Type of Metal C12200 Phosphorized, high residual phosphorus (DHP) 1.4 The following pertains to the test method described in 15.2.4 of this specification: This standard does not purport to address all 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
ASTM Standards B153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing B251 Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube B601 Classification for Temper Designations for Copper and Copper Alloys--Wrought and Cast B846 Terminology for Copper and Copper Alloys B950 Guide for Editorial Procedures and Form of Product Specifications for Copper and Copper Alloys E3 Guide for Preparation of Metallographic Specimens E8/E8M 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 E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) E112 Test Methods for Determining Average Grain Size 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
Keywords
Deoxidized Copper - Heat Exchangers - Hvac Systems - Phosphorus Deoxidized Copper - Refrigeration Systems - Seamless Copper Alloy Tubes - Seamless Tubes And Pipes
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