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

Relations

• Refers: ASTM E8/E8M-24 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Jan-2024
• Refers: ASTM B828-23 - Standard Practice for Making Capillary Joints by Soldering of Copper and Copper Alloy Tube and Fittings
• Effective Date: 01-Dec-2023
• Refers: ASTM B846-19a - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Aug-2019
• Refers: ASTM B577-19 - Standard Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
• Effective Date: 01-Apr-2019
• Refers: ASTM B846-19 - Standard Terminology for Copper and Copper Alloys
• Effective Date: 01-Jan-2019
• Refers: ASTM B601-18a - Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
• Effective Date: 01-Oct-2018
• Refers: ASTM E243-18 - Standard Practice for Electromagnetic (Eddy Current) Examination of Copper and Copper-Alloy Tubes
• Effective Date: 01-Jun-2018
• Refers: ASTM B601-18 - Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
• Effective Date: 01-Mar-2018
• Refers: ASTM B601-16 - Standard Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
• Effective Date: 01-Oct-2016
• Refers: ASTM E8/E8M-16 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 15-Jul-2016
• Refers: ASTM B828-16 - Standard Practice for Making Capillary Joints by Soldering of Copper and Copper Alloy Tube and Fittings
• Effective Date: 01-Jun-2016
• Refers: ASTM B813-16 - Standard Specification for Liquid and Paste Fluxes for Soldering of Copper and Copper Alloy Tube
• Effective Date: 01-May-2016
• Refers: ASTM B577-16 - Standard Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
• Effective Date: 01-Apr-2016
• Refers: ASTM B170-99(2015) - Standard Specification for Oxygen-Free Electrolytic Copper—Refinery Shapes
• Effective Date: 15-Oct-2015
• Refers: ASTM E8/E8M-15 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Feb-2015

Overview

ASTM B640-12a(2021) is the internationally recognized standard specification for welded copper tube used in air conditioning and refrigeration service. Developed by ASTM, this standard defines material, manufacturing, and performance requirements for copper tube products designed for use in system connections, repairs, and alterations within air conditioning and refrigeration systems. The specification ensures welded copper tubes meet high standards in terms of purity, strength, cleanliness, and reliability, making them suitable for demanding HVACR (Heating, Ventilation, Air Conditioning, and Refrigeration) applications.

Key Topics

• Material Requirements:
  The standard establishes that welded copper tubes should be manufactured from sheet or strip of specific copper alloys, including UNS C10100 (Oxygen-Free Electronic), C10200 (Oxygen-Free), C12000 (Phosphorus-Deoxidized, Low Phosphorus), or C12200 (Phosphorus-Deoxidized, High Phosphorus).

• Manufacturing Process:

  • Copper is formed into tube shape and welded automatically.
  • Tubes are cold worked to final dimensions and annealed as needed to achieve specified temper properties.
  • Products may be delivered in annealed coils or drawn temper straight lengths.

• Performance and Testing:
  To ensure the integrity and suitability of copper tubes, the specification requires:

  • Tensile strength tests for mechanical properties
  • Expansion and flattening tests
  • Microscopical examination (for certain alloys)
  • Hydrogen embrittlement testing
  • Reverse bend tests
  • Electromagnetic (eddy current) testing
  • Cleanliness testing to verify internal residue levels

• Dimensional Control:
  Standards for diameter, wall thickness, roundness, and cut squareness are included to ensure product consistency.

• Identification and Marking:
  All copper tubes must be marked with manufacturer details and relevant specifications for traceability.

Applications

The scope of ASTM B640 applies to welded copper tube in HVACR systems, notably for:

• System Connections:
  Used to route refrigerant or air in split-system, packaged, and ductless air conditioners, heat pumps, and refrigeration units.

• System Repairs and Alterations:
  Ideal for maintenance and retrofit work where reliable copper tube connections are required.

• OEM Equipment:
  Frequently used by equipment manufacturers to ensure compliance with international HVACR material quality standards.

• Construction and Manufacturing:
  Employed by contractors and engineers seeking guaranteed performance for new building installations and system upgrades.

Utilizing copper tube certified to ASTM B640 guarantees high performance, corrosion resistance, and compatibility with industry-recognized methods for joining, cleaning, and testing.

Related Standards

ASTM B640 references and aligns with several important related standards to ensure full-system compatibility:

• ASME B16.22:
  Wrought copper and copper alloy solder joint pressure fittings for HVACR systems.

• ASTM B32:
  Specification for solder metal used in joining copper tubes.

• ASTM B813:
  Specification for acceptable fluxes in soldering processes.

• ASTM B828:
  Practice for making capillary joints by soldering copper tubes and fittings.

• ASTM E8/E8M:
  Test methods for tensile testing of metals.

• ASTM E243:
  Practice for electromagnetic examination of copper tubes.

By adhering to these standards, HVACR professionals and manufacturers ensure safe, efficient, and reliable system performance for both residential and commercial systems.

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Keywords: welded copper tube, air conditioning, refrigeration, ASTM B640, copper tubing, HVACR, copper alloy C12200, copper tube testing, refrigeration system repairs, copper tube specification

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
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-
2.1 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
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
and CopperAlloys and is the direct responsibility of Subcommittee B05.04 on Pipe
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
B640−12a (2021)
E62Test Methods for Chemical Analysis of Copper and C12000, or C12200 of such purity and soundness as to be
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
5.2 Manufacture:
E255Practice for Sampling Copper and Copper Alloys for
5.2.1 The product shall be manufactured by forming the
the Determination of Chemical Composition
material into a tubular shape on a suitable forming mill and
E527Practice for Numbering Metals and Alloys in the
welded using an automatic process.
Unified Numbering System (UNS)
5.2.2 The product shall be cold worked to the finished size
2.2 ASME Standard:
and wall thickness and subsequently annealed, when required,
B16.22Wrought Copper and Copper Alloy Solder Joint
to meet the temper properties specified.
Pressure Fittings
5.2.3 The product shall conform to “fully finished tube” as
required in 5.2.3.1 and 5.2.3.2:
3. Terminology
5.2.3.1 Welded tube with internal and external flash re-
3.1 For definitions of terms related to copper and copper
movedbyscarfing,andthetubesubsequentlycolddrawn,over
alloys, refer to Terminology B846.
a mandrel and annealed as necessary to conform to the
specified temper.
3.2 Definitions of Terms Specific to This Standard:
5.2.3.2 Weldedtubethathasbeenmechanicallyworkedinto
3.2.1 tube, air-conditioning, n—a welded copper tube con-
asmoothtubewithouttheneedforinternalorexternalscarfing,
forming to a standard series of sizes and to specified internal
or other metal removal and subsequently cold drawn over a
cleanness requirements, normally furnished in drawn temper
mandrel and annealed as necessary to conform to the specified
straight lengths, with the ends capped or sealed.
size and temper.
3.2.2 tube, refrigeration-service, n—a welded copper tube
5.2.4 CoiledlengthsspecifiedasO60,soft-annealedtemper,
conforming to a standard series of sizes and to special internal
shall be bright annealed after coiling, then dehydrated, and
cleannessanddehydrationrequirements,normallyfurnishedin
capped, plugged, crimped, or otherwise closed at both ends so
soft temper coils, with ends capped or sealed.
astomaintaintheinternalcleannessofthetubingundernormal
conditions of handling and storage.
4. Ordering Information
5.2.5 Straight lengths specified as H58, hard-drawn temper,
4.1 Include the following information when placing orders
shall be cleaned and capped, plugged, or otherwise closed at
for product under this specification, as applicable:
both ends so as to maintain the internal cleanness of the tubing
4.1.1 ASTM designation and year of issue;
under normal conditions of handling and storage.
4.1.2 Copper Alloy UNS No. designation;
4.1.3 Temper (Section 7);
6. Chemical Composition
4.1.4 Dimensions: diameter, wall thickness, length, and so
6.1 The material shall conform to the chemical composi-
forth (Section 11);
tional requirements in Table 1 for the Copper UNS No.
4.1.5 How furnished (straight lengths or coils); and
designation specified in the ordering information.
4.1.6 Quantity: total weight or number of pieces or coils of
each copper, size, and temper.
6.2 These composition limits do not preclude the presence
ofotherelements.Byagreementbetweenthemanufacturerand
4.2 The following options are available and should be
purchaser, limits may be established and analysis required for
specified at the time of placing the order when required:
unnamed elements.
4.2.1 Hydrogen embrittlement susceptibility (9.3),
4.2.2 Microscopical Examination (9.2),
4.2.3 Expansion test (9.1),
4.2.4 Cleanness test (10.2),
4.2.5 Flattening test (9.4), TABLE 1 Chemical Requirements
4.2.6 Reverse bend test (9.5),
Copper
A
4.2.7 Certification (Section 20),
Copper, Phosphorus
UNS No.
min
4.2.8 Test report (Section 21), and
Min Max
4.2.9 When product is purchased for agencies of the U.S.
B,C
C10100 99.99 . C
Government (10.3).
D
C10200 99.95 . .
C12000 99.90 0.004 0.012
5. Materials and Manufacture
C12200 99.9 0.015 0.040
A
5.1 Material—Thematerialofmanufactureshallbesheetor Copper (including silver).
B
This value is exclusive of silver and shall be determined by difference of “impurity
strip of Copper Alloy UNS No. C10100, or C10200, or
total” from 100 %. “Impurity total” is defined as the sum of sulfur, silver, lead, tin,
bismuth, arsenic, antimony, iron, nickel, zinc, phosphorus, selenium, tellurium,
manganese, cadmium, and oxygen present in the sample.
C
The last approved version of this historical standard is referenced on
Impurity parts per million maximums for C10100 shall be: antimony 4, arsenic 5,
www.astm.org.
bismuth 1, cadmium 1, iron 10, lead 5, manganese 0.5, nickel 10, oxygen 5,
Available from American Society of Mechanical Engineers (ASME), ASME
phosphorus 3, selenium 3, silver 25, sulfur 15, tellurium 2, tin 2, and zinc 1.
D
International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
Oxygen in C10200 shall be 10 ppm max.
www.asme.org.
B640−12a (2021)
7. Temper bent in accordance with the test method described in 16.2.5,
shall show no evidence of cracks, lack of penetration in the
7.1 The standard tempers for products described in this
weld, or overlaps resulting from flash removal visible to the
specification are given in Table 2.
unaided eye which are considered unacceptable for the in-
7.1.1 Drawn general purpose H58.
tended application.
7.1.2 Annealed temper O60.
7.2 Tempers are defined in Classification B601. Other
10. Other Requirements
special anneal tempers may be supplied as agreed upon
10.1 Electromagnetic (Eddy-Current) Test:
between the manufacturer or supplier and the purchaser.
10.1.1 Each straight length tube, up to and including 3 ⁄8in.
(79.4mm) outside diameter, shall be passed through an eddy-
8. Mechanical Property Requirements
current testing unit adjusted to provide information on the
8.1 Tensile Strength Requirements:
suitability of the tube for the intended application.
8.1.1 Product furnished under this specification shall con-
10.1.2 Tubes that do not actuate the signaling device of the
form to the tensile requirements prescribed in Table 2 when
eddy-current testing unit shall be considered as conforming to
tested in accordance with Test Methods E8/E8M.
therequirementsofthetest.Testingshallfollowtheprocedures
8.1.1.1 Acceptance or rejection based upon mechanical
of Practice E243, except for the determination of “end effect.”
properties shall depend only on tensile strength.
10.1.3 Testing of coiled lengths shall be subject to negotia-
tion between the manufacturer and the purchaser.
9. Performance Requirements
10.1.4 For tubes greater than 3 ⁄8 in. (79.4 mm) in outside
9.1 Expansion Test:
diameter, the manufacturer and purchaser shall agree on
9.1.1 When specified in the contract or purchase order,
whatever nondestructive testing is required.
product test specimens from tube furnished in the O60 an-
10.2 Cleanness Test:
nealed temper shall be expanded in accordance with Test
10.2.1 When specified in the contract or purchase order, a
Method B153 with an expansion of the outside diameter in the
cleanness test described in 16.2.7 shall be performed.
following percentage:
10.2.1.1 After evaporation of the cleaning solvent, the
Outside Diameter, Expansion of Outside
2 2
residue weight shall not exceed 0.0035 g/ft (0.038 g/m ). The
in. (mm) Diameter, %
maximumamountofresidueingramspertubeshallnotexceed
⁄8 (15.9) and under 30
the limits in Tables 3 and 4.
Over ⁄8 (15.9) 25
10.3 Purchases for Agencies of the U.S. Government—
9.1.2 The expanded tube shall show no cracking or other
defects visible to the unaided eye. When specified in the contract or purchase order, product
purchased for agencies of the U.S. government shall conform
9.2 Microscopical Examination—When specified in the
to the requirements stipulated in the Supplementary Require-
contract or purchase order, product test specimens of Copper
ments.
UNS Nos. C10100, C10200, and C12000 shall be free of
cuprous oxide as determined by Test Method A of Test
Methods B577.
9.3 Hydrogen Embrittlement Susceptibility—When speci-
A
TABLE 3 Interior Surface Residue Limits of Soft Coiled Lengths
fiedinthecontractorpurchaseorder,producttestspecimensof
B
Wall Thickness, Residue Limit per 50
Copper UNS Nos. C10100, C10200, C12000, and C12200 ft (15.2 m) coil, g
in. (mm)
shall conform to the requirements of Test Method B of Test
Copper UNS Copper UNS
Standard Size, in.
Nos. C10100, Nos. C10100,
Methods B577.
C10200, C10200,
C12000, and C12000, and
9.4 Flattening Test:
C12200 C12200
9.4.1 When specified in the contract or purchase order, the
flattening test shall be performed in accordance with Test
⁄8 0.030 (0.762) 0.0030
Method B968/B968M. 3
⁄16 0.030 (0.762) 0.0058
⁄4 0.030 (0.762) 0.0087
9.5 Reverse Bend Test—When specified in the contract or
⁄16 0.032 (0.813) 0.0114
purchase order, the product test specimens when flattened and
⁄8 0.032 (0.813) 0.0143
⁄2 0.032 (0.813) 0.0200
⁄8 0.035 (0.889) 0.0254
⁄4 0.035 (0.889) 0.0312
TABLE 2 Mechanical Property Requirements
⁄4 0.042 (1.07) 0.0305
Copper UNS Nos. C10100, C10200, C12000, and C12200 ⁄8 0.045 (1.14) 0.0360
Tensile Strength, Min Elongation in 2 1 ⁄8 0.050 (1.27) 0.0470
A B
Form Temper ksi MPa in. (50 mm), Min, 1 ⁄8 0.055 (1.40) 0.0580
% 1 ⁄8 0.060 (1.52) 0.0690
Coiled lengths O60 30 205 40
A
See also Table 5.
Straight lengths H58 36 250 . . .
B 2 2
Residue limit 0.0035 g ⁄ft (0.038 g ⁄m ) inside area. The internal surface area
A
ksi = 1000 psi. per foot or tube is determined by the equation (3.1416 × inside diameter ×
B
See Appendix X1. 144)/1728.
B640−12a (2021)
A
TABLE 4 Interior Surface Residue Limits of Straight Lengths
11.4 Roundness:
B
Wall Thickness, in. Residue Limit per 20
11.4.1 Straight Lengths—For unannealed drawn tube in
ft (6.10 m), g
(mm)
straightlengths,theroundnesstoleranceisspecifiedinTable7.
Copper UNS Copper UNS
The deviation from roundness is measured as the difference
Standard Size, in.
Nos. C10100, Nos. C10100,
C10200, C10200, between major and minor diameters as determined at any one
C12000, and C12000, and
cross section of the tube. Roundness tolerance has not been
C12200 C12200
established for annealed tube in straight lengths.
11.4.2 Coil Lengths—Roundness tolerance has not been
⁄8 0.030 (0.762) 0.0058
⁄2 0.035 (0.889) 0.0079 established for tubes furnished in coils.
⁄8 0.040 (1.02) 0.0100
11.5 Squareness of Cut—For tube in straight lengths, the
⁄4 . .
⁄4 . .
deviation from squareness is measured as the difference be-
⁄4 0.042 (1.07) 0.0122
tweenonesideofacrosssectionoftubefromtheoppositeside
⁄8 0.045 (1.14) 0.0144
when measured against the projected perpendicularity of the
1 ⁄8 0.050 (1.27) 0.0188
1 ⁄8 0.055 (1.40) 0.0232
plane of the projected center of the tube. The departure from
1 ⁄8 0.060 (1.52) 0.0276
squareness of the end of any tube shall not exceed more than
2 ⁄8 0.070 (1.78) 0.0364
0.010 in. (0.25 mm) for tube up to and including ⁄8in. (15.9
2 ⁄8 0.080 (2.03) 0.0453
3 ⁄8 0.090 (2.29) 0.0540
mm) standard size; and not more than 0.016 in./in. (0.016
3 ⁄8 0.100 (2.54) 0.0628
mm/mm) of outside diameter, for tube larger than ⁄8in. (15.9
4 ⁄8 0.110 (2.79) 0.0717
mm) standard size.
A
See also Table 6.
B 2 2
Residue limit 0.0035 g ⁄ft (0.038 g ⁄m ) inside area. The internal surface area
NOTE 4—For the purpose of determining conformance with the dimen-
per foot of tube is determined by the equation (3.146 × inside diameter ×
sional requirements prescribed in this specification, any measured value
144)/1728.
outside the specified limiting values for any dimension may be cause for
rejection.
11. Dimensions, Mass, and Permissible Variations
12. Workmanship, Finish, and Appearance
11.1 The standard dimensions, weights per foot, and toler-
12.1 The product shall be free of defects, but blemishes of
ancesforthevariousnominalsizesaregiveninTables5and6.
a nature that do not interfere with the intended application are
acceptable.
11.2 Wall Thickness and Diameter:
11.2.1 For Coil Lengths—Table 5.
13. Sampling
11.2.2 For Straight Lengths—Table 6.
13.1 The lot size, portion size, and selection of sample
11.3 Length:
pieces shall be as follows:
11.3.1 The standard length for coils shall be 50 ft (15.2 m).
13.1.1 Lot Size—For tube, the lot size shall be 10000 lb
The length tolerances for all coils shall be +12 in. (300 mm)
and −0 in. (4550 kg) or fraction thereof.
11.3.2 The standard length for straight lengths shall be 20 ft 13.1.2 Portion Size—Sample pieces shall be taken for test
(6.10 m). The length tolerances for all lengths shall be +1 in. purposes from each lot in accordance with the following
(25 mm) and −0 in. schedule:
TABLE 5 Standard Dimensions, Weights, and Tolerances for Diameter and Wall Thickness for Coil Lengths
Wall Thickness, Weight, lb/ft
Tolerances
in. (mm) (kg/m)
Copper UNS Copper UNS
Outside Diameter,
Standard Size, in.
A
Nos. C10100, Nos. C10100,
Average Outside
in. (mm) B,C
Wall Thickness, Plus
C10200, C10200, Diameter, Plus and
and Minus, in. (mm)
Minus, in. (mm)
C12000, and C12000, and
C12200 C12200
⁄8 0.125 (3.18) 0.030 (0.762) 0.0347 (0.0516) 0.002 (0.051) 0.003 (0.076)
⁄16 0.187 (4.75) 0.030 (0.762) 0.0575 (0.0856) 0.002 (0.051) 0.0025 (0.064)
⁄4 0.250 (6.35) 0.030 (0.762) 0.0804 (0.120) 0.002 (0.051) 0.0025 (0.064)
⁄16 0.312 (7.92) 0.032 (0.813) 0.109 (0.162) 0.002 (0.051) 0.0025 (0.064)
⁄8 0.375 (9.52) 0.032 (0.813) 0.134 (0.199) 0.002 (0.051) 0.0025 (0.064)
⁄2 0.500 (12.7) 0.032 (0.813) 0.182 (0.271) 0.002 (0.051) 0.0025 (0.064)
⁄8 0.625 (15.9) 0.035 (0.889) 0.251 (0.373) 0.002 (0.051) 0.0030 (0.076)
⁄4 0.750 (19.1) 0.035 (0.889) 0.305 (0.454) 0.0025 (0.064) 0.0035 (0.089)
⁄4 0.750 (19.1) 0.042 (1.07) 0.362 (0.539) 0.0025 (0.064) 0.0035 (0.089)
⁄8 0.875 (22.3) 0.045 (1.114) 0.455 (0.677) 0.003 (0.076) 0.004 (0.10)
1 ⁄8 1.125 (28.6) 0.050 (1.27) 0.665 (0.975) 0.0035 (0.089) 0.004 (0.10)
1 ⁄8 1.375 (34.9) 0.055 (1.40) 0.884 (1.32) 0.004 (0.10) 0.0045 (0.11)
A
The average outside diameter of a tube is the average of the maximum and minimum outside diameters as determined at any one cross section of the tube.
B
The tolerances listed represent the maximum deviation at any point.
C
May contain a residual thickening at the weld not to exceed 0.006 in. (0.15 mm) or 10 % of the nominal wall thickness, whichever is greater.
B640−12a (2021)
TABLE 6 Standard Dimensions, Weights, and Tolerances for Diameter and Wall Thickness for Straight Lengths
NOTE 1—Applicable to drawn temper tube only.
Wall Thickness, Weight, lb/ft
Tolerances
in. (mm) (kg/m)
Copper UNS Copper UNS
Outside Diameter,
A
Standard Size, in. Nos. C10100, Nos. C10100,
Average Outside
B,C
in. (mm)
Wall Thickness, Plus
C10200, C10200, Diameter, Plus and
and Minus, in. (mm)
Minus, in. (mm)
C12000, and C12000, and
C12200 C12200
⁄8 0.375 (9.52) 0.030 (0.762) 0.126 (0.187) 0.001 (0.025) 0.0035 (0.089)
⁄2 0.500 (12.7) 0.035 (0.889) 0.198 (0.295) 0.001 (0.025) 0.0035 (0.089)
⁄8 0.625 (15.9) 0.040 (1.02) 0.285 (0.424) 0.001 (0.025) 0.0035 (0.089)
⁄4 0.750 (19.1) 0.042 (1.07) 0.362 (0.539) 0.001 (0.025) 0.0035 (0.089)
⁄8 0.875 (22.3) 0.045 (1.14) 0.455 (0.677) 0.001 (0.025) 0.004 (0.10)
1 ⁄8 1.125 (28.6) 0.050 (1.27) 0.655 (0.975) 0.0015 (0.038) 0.004 (0.10)
1 ⁄8 1.375 (34.9) 0.055 (1.40) 0.884 (1.32) 0.0015 (0.038) 0.0045 (0.11)
1 ⁄8 1.625 (41.3) 0.060 (1.52) 1.14 (1.70) 0.002 (0.051) 0.0045 (0.11)
2 ⁄8 2.125 (54.0) 0.070-(1.78) 1.75 (2.60) 0.002 (0.051) 0.006 (0.15)
2 ⁄8 2.625 (66.7) 0.080 (2.03) 2.48 (3.69) 0.002 (0.051) 0.006 (0.15)
3 ⁄8 3.125 (79.4) 0.090 (2.29) 3.33 (4.96) 0.002 (0.051) 0.007 (0.18)
3 ⁄8 3.625 (92.1) 0.100 (2.54) 4.29 (6.38) 0.002 (0.051) 0.007 (0.18)
4 ⁄8 4.125 (105) 0.110 (2.79) 5.38 (8.01) 0.002 (0.051) 0.009 (0.23)
A
The average outside diameter of a tube is the average of the maximum and minimum outside diameters as determined at any one cross section of the tube.
B
The tolerances listed represent the maximum deviation at any point.
C
May contain a residual thickening at the weld not to exceed 0.006 in. (0.15 mm) or 10 % of the nominal wall thickness, whichever is greater.
TABLE 7 Roundness Tolerance
to sample and analyze the finished product. The number of
samples taken for determination of chemical composition shall
NOTE 1—Applicable to drawn unannealed straight length tube only.
be as follows:
t/D (Ratio of Wall Thick- Roundness Tolerance, Percent of Nominal
(1)When samples are taken at the time the castings are
ness to Nominal Outside Outside Diameter (Expressed to Nearest
Diameter) 0.001 in. or 0.010 mm)
poured, at least one sample shall be taken for
...