ASTM B640-12a(2021)

Standard Specification for Welded Copper Tube for Air Conditioning and Refrigeration Service

ABSTRACT
This specification establishes the requirements for welded copper for air conditioning and refrigeration service for use in connections, repairs, and alterations. The material of manufacture shall be sheet or strip of Copper Alloy UNS No. C10100, or C10200, or C12000, or C12200 of such purity and soundness as to be suitable for processing into welded tube to meet the properties prescribed. The product shall be manufactured by forming the material into a tubular shape on a suitable forming mill and welded using an automatic process. The product shall be cold worked to the finished size and wall thickness and subsequently annealed to meet the temper properties specified. The material shall conform to the chemical compositional requirements for the Copper UNS No. designation specified. Tensile strength test, expansion test, microscopical examination, hydrogen embrittlement susceptibility, flattening test, reverse bend test, electromagnetic test, and cleanness test shall be made to conform to specified requirements.
SCOPE
1.1 This specification establishes the requirements for welded copper tube for air conditioning and refrigeration service for use in connections, repairs, and alterations. The tube shall be made from one of the following coppers:
Copper UNS No.  
Previously Used Designation  
Type of Copper  
C10100  
OFE  
Oxygen-free electronic  
C10200  
OF  
Oxygen-free without-residual oxidants  
C12000  
DLP  
Phosphorus-deoxidized, low-residual phosphorus  
C12200  
DHP  
Phosphorus-deoxidized, high-residual phosphorus  
Note 1: Fittings used for soldered or brazed connections in air conditioning and refrigeration systems are described in ASME Standard B 16.22.
Note 2: The assembly of copper tubular systems by soldering is described in Practice B828.
Note 3: Solders for joining copper tubular systems by described in Specification B32. The requirements for acceptable fluxes for these systems are described in Specification B813.  
1.2 Copper UNS No. C12200 shall be furnished, unless otherwise specified. The copper tube shall be supplied in annealed coils or drawn temper straight lengths.  
1.3 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.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Dec-2020
• ICS: 77.150.30 - Copper products
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.04 - Pipe and Tube

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B640 −12a (Reapproved 2021)
Standard Specification for
Welded Copper Tube for Air Conditioning and Refrigeration
1
Service
This standard is issued under the fixed designation B640; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
1.1 This specification establishes the requirements for
mine the applicability of regulatory limitations prior to use.
welded copper tube for air conditioning and refrigeration
1.5 This international standard was developed in accor-
serviceforuseinconnections,repairs,andalterations.Thetube
dance with internationally recognized principles on standard-
shall be made from one of the following coppers:
ization established in the Decision on Principles for the
Copper UNS Previously Type of
Development of International Standards, Guides and Recom-
No. Used Copper
Designation mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
C10100 OFE Oxygen-free
electronic
C10200 OF Oxygen-free 2. Referenced Documents
without-
2
2.1 ASTM Standards:
residual
oxidants
B32Specification for Solder Metal
C12000 DLP Phosphorus-
B153Test Method for Expansion (Pin Test) of Copper and
deoxidized,
low-residual Copper-Alloy Pipe and Tubing
phosphorus
B170Specification for Oxygen-Free Electrolytic Copper—
C12200 DHP Phosphorus-
Refinery Shapes
deoxidized,
high-residual B577TestMethodsforDetectionofCuprousOxide(Hydro-
phosphorus
gen Embrittlement Susceptibility) in Copper
B601ClassificationforTemperDesignationsforCopperand
NOTE 1—Fittings used for soldered or brazed connections in air
Copper Alloys—Wrought and Cast
conditioning and refrigeration systems are described in ASME Standard
B813Specification for Liquid and Paste Fluxes for Solder-
B16.22.
ing of Copper and Copper Alloy Tube
NOTE 2—The assembly of copper tubular systems by soldering is
B828Practice for Making Capillary Joints by Soldering of
described in Practice B828.
NOTE 3—Solders for joining copper tubular systems by described in Copper and Copper Alloy Tube and Fittings
Specification B32. The requirements for acceptable fluxes for these
B846Terminology for Copper and Copper Alloys
systems are described in Specification B813.
B900Practice for Packaging of Copper and Copper Alloy
1.2 Copper UNS No. C12200 shall be furnished, unless
Mill Products for U.S. Government Agencies
otherwise specified. The copper tube shall be supplied in
B968/B968MTest Method for Flattening of Copper and
annealed coils or drawn temper straight lengths.
Copper-Alloy Pipe and Tube
E3Guide for Preparation of Metallographic Specimens
1.3 Units—The values stated in inch-pound units are to be
E8/E8MTest Methods for Tension Testing of Metallic Ma-
regarded as standard. The values given in parentheses are
terials
mathematical conversions to SI units that are provided for
E29Practice for Using Significant Digits in Test Data to
information only and are not considered standard.
Determine Conformance with Specifications
1.4 This standard does not purport to address all of the
E53Test Method for Determination of Copper in Unalloyed
safety concerns, if any, associated with its use. It is the
Copper by Gravimetry
1
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
and CopperAlloys and is the direct responsibility of Subcommittee B05.04 on Pipe
2
and Tube. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 1, 2021. Published January 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1978. Last previous edition approved in 2012 as B640–12a. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0640-12AR21. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B640−12a (2021)
E62Test Methods for Chemical Analysis of Copper and C12000, or C12200 of such purity and soundness as to be
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CopperAlloys(PhotometricMethods)(Withdrawn2010) suitable for processing into welded tube to meet the properties
E243PracticeforElectromagnetic(EddyCurrent)Examina- prescribed herein.
tion of Copper and Copper-Alloy Tubes
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