ASTM B68 / B68M Standard Specification for Seamless Copper Tube, Bright Annealed

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ASTM B68 / B68M Standard Specification for Seamless Copper Tube, Bright Annealed
This specification establishes the requirements for bright annealed seamless copper tube suitable for use in refrigeration, oil lines, gasoline lines, and so forth, where tube with an interior surface essentially free from scale and dirt is required. The tube shall be manufactured by such hot- or cold-working processes as to produce a homogeneous uniform wrought structure in the finished product. The tube shall be cold drawn to the finished size and wall thickness and shall be bright annealed to meet the specified temper. The material shall conform to the chemical composition requirements prescribed and the tube shall be furnished in either of two annealed tempers, light annealed or soft annealed. Grain size and mechanical properties such as tensile strength and elongation shall be determined. The material shall be subjected to expansion and flattening tests to evaluate its performance. An electromagnetic or eddy-current test, a nondestructive test, shall be done as well.
1. Scope
1.1 This specification establishes the requirements for bright annealed seamless copper tube suitable for use in refrigeration, oil lines, gasoline lines, and so forth, where tube with an interior surface essentially free from scale and dirt is required.
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 B251M Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube (Metric) B577 Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper B601 Classification for Temper Designations for Copper and Copper Alloys--Wrought and Cast B846 Terminology for Copper and Copper Alloys B968/B968M Test Method for Flattening of Copper and Copper-Alloy Pipe and Tube 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 E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS) E2575 Test Method for Determination of Oxygen in Copper and Copper Alloys
Keywords
Annealing - Bright Annealing - Deoxidized Copper - Gas Pipelines - Hvac Systems - Oil And Gas Pipelines - Oil Pipelines - Oxygen Free Copper - Refrigeration Systems - Seamless Copper Alloy Tubes - Seamless Tubes And Pipes
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