ASTM B919-01(2006)

Standard Specification for Welded Copper Heat Exchanger Tubes With Internal Enhancement

ABSTRACT
This specification establishes the requirements for welded, internally enhanced copper tube, in straight lengths or coils, suitable for use in refrigeration and air conditioning products or other heat exchangers. The following types of welded tubes are: as-welded and welded tube, subsequently annealed. The material of manufacture shall be sheet or strip, of the required alloy, and may be either cold worked or annealed. The welded tube shall be manufactured from either cold rolled or annealed sheet or strip. The sheet or strip shall be formed into a tubular shape on a suitable forming mill. The material shall conform to the chemical requirements specified. The microstructure shall show complete recrystallization and shall have an average grain size within the limits specified. Nondestructive examination, electromagnetic test, cleanness requirements, and cuprous oxide requirement shall be made to conform to the specified requirements.
SCOPE
1.1 This specification establishes the requirements for welded, 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, which are provided for information only and are not considered standard.
1.3 The product shall be produced of the following coppers. Unless otherwise specified, tubes made from any one of these coppers may be supplied:Copper UNS No.Type of MetalC10200Oxygen-free without residual deoxidantsC12200Phosphorized, high residual phosphorus (DHP)
The following pertains to the test method described in of 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 requirements prior to use.

General Information

• Status: Historical
• Publication Date: 30-Sep-2006
• ICS: 77.140.30 - Steels for pressure purposes
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.04 - Pipe and Tube

Relations

• Replaces: ASTM B919-01 - Standard Specification for Welded Copper Heat Exchanger Tubes With Internal Enhancement
• Effective Date: 01-Oct-2006
• Replaced By: ASTM B919-12 - Standard Specification for Welded Copper Heat Exchanger Tubes With Internal Enhancement
• Effective Date: 01-Apr-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B919 – 01 (Reapproved 2006)
Standard Specification for
Welded Copper Heat Exchanger Tubes With Internal
Enhancement
This standard is issued under the fixed designation B919; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to
1.1 This specification establishes the requirements for
Determine Conformance with Specifications
welded, internally enhanced copper tube, in straight lengths or
E53 Test Method for Determination of Copper in Unalloyed
coils, suitable for use in refrigeration and air conditioning
Copper by Gravimetry
products or other heat exchangers.
E62 Test Methods for Chemical Analysis of Copper and
1.2 Units—The values stated in inch-pound units are to be
Copper Alloys (Photometric Methods)
regarded as standard. The values given in parentheses are
E112 Test Methods for Determining Average Grain Size
mathematical conversions to SI units, which are provided for
E243 Practice for Electromagnetic (Eddy-Current) Exami-
information only and are not considered standard.
nation of Copper and Copper-Alloy Tubes
1.3 The product shall be produced of the following coppers.
E255 Practice for Sampling Copper and Copper Alloys for
Unless otherwise specified, tubes made from any one of these
the Determination of Chemical Composition
coppers may be supplied:
Copper UNS No. Type of Metal
3. Terminology
C10200 Oxygen-free without residual deoxidants
3.1 For the definition of terms related to copper and copper
C12200 Phosphorized, high residual phosphorus (DHP)
alloys refer to Terminology B846.
1.4 The following pertains to the test method described in 3.2 Definitions:
18.4 of this specification. This standard does not purport to 3.2.1 bottom wall, n—the wall thickness measured from the
address all of the safety concerns, if any, associated with its base of the enhancement to the outside surface.
use. It is the responsibility of the user of this standard to
3.2.2 coil, n—a length of the product wound into a series of
establish appropriate safety and health practices and deter- connected turns.
mine the applicability of regulatory requirements prior to use. 3.2.3 enhancement, n—a geometrical feature intentionally
formed on a tube I.D. surface to improve heat transfer.
2. Referenced Documents
3.2.4 level wound, adj—a type of coil in which the turns are
2.1 ASTM Standards:
wound into layers parallel to the axis of the coil such that
B153 Test Method for Expansion (Pin Test) of Copper and successive turns in a given layer are next to one another.
Copper-Alloy Pipe and Tubing
3.3 Definitions of Terms Specific to This Standard:
B577 Test Methods for Detection of Cuprous Oxide (Hy- 3.3.1 roundness tolerance, n—the roundness tolerance is
drogen Embrittlement Susceptibility) in Copper
defined as the maximum OD at a point minus the minimum
B601 Classification for Temper Designations for Copper OD, at the same plane of intersection of the tube, divided by
and Copper Alloys—Wrought and Cast
the specified OD 3 100 %.
B846 Terminology for Copper and Copper Alloys 3.3.2 squareness of cut, n—the maximum deviation of one
E3 Guide for Preparation of Metallographic Specimens
side of a cross section from the opposite side, when measured
against the projected perpendicularity of the plane of the
projected center of the tube at the ends.
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
and CopperAlloys and is the direct responsibility of Subcommittee B05.04 on Pipe
4. Classification
and Tube.
Current edition approved Oct. 1, 2006. Published November 2006. Originally
4.1 The following types of welded tube are manufactured
approved in 2001. Last previous edition approved in 2001 as B919 – 01. DOI:
under the scope of this specification:
10.1520/B0919-01R06.
4.1.1 As-Welded—Welded tube without subsequent heat
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM treatment or cold work.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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B919 – 01 (2006)
TABLE 1 Chemical Requirements
4.1.2 Welded Tube, Subsequently Annealed—Welded tube
annealed to produce a uniform grain size appropriate to the UNS Alloy Number Copper, wt % Phosphorus, wt %
A
specified annealed temper.
C10200 99.95 min
C12200 99.9 min 0.015 - 0.040
5. Ordering Information A
Oxygen in C10200 shall be 10 ppm max.
5.1 Include the following information when placing orders
for product under this specification:
and analysis for unnamed elements shall be established by
5.1.1 ASTM designation number and year of issue,
agreement between the manufacturer and the purchaser.
5.1.2 Copper UNS No.,
5.1.3 Tube type (Section 4),
8. Temper
5.1.4 Temper (Section 8),
8.1 Tempers, as defined in Classification B601,ofthe
5.1.5 Length, diameter, bottom-wall thickness, and en-
various tube types are as follows:
hancement dimensions. Configuration of the enhanced surface
8.1.1 As-Welded:
shall be as agreed upon between the manufacturer, or supplier,
and purchaser, 8.1.1.1 Annealed strip WM50, subsequently internally en-
hanced by cold working and welded.
5.1.6 How furnished: straight or coils,
5.1.7 Quantity, 8.1.2 Welded and Annealed:
8.1.2.1 Annealed strip, internally enhanced by cold work-
5.1.8 Cuprous oxide test, if required (12.3 and 16.1.4),
5.1.9 Certification, when required (Section 22), and ing, welded and soft annealed W060, and
8.1.2.2 Annealed strip, internally enhanced by cold work-
5.1.10 Mill test report, if required (Section 23).
ing, welded and light annealed W050.
6. Materials and Manufacture
NOTE 1—By agreement with the purchaser and manufacturer, product
6.1 Material:
in special tempers may be supplied with properties as agreed upon
6.1.1 The material of manufacture shall be sheet or strip, of
between the purchaser and the manufacturer.
the required alloy, and may be either cold worked or annealed.
9. Grain Size for Annealed Tempers
6.1.2 The material shall be of such purity and soundness as
to be suitable for processing into the product prescribed herein.
9.1 Samples of annealed temper tubes shall be examined at
6.2 Manufacture:
a magnification of 75 diameters. The grain size shall be
6.2.1 The welded tube shall be manufactured from either
determined in the wall beneath the internal enhancement. The
coldrolledorannealedsheetorstrip.Thesheetorstripshallbe
microstructure shall show complete recrystallization and shall
formed into a tubular shape on a suitable forming mill.
have an average grain size within the limits specified in Table
6.2.2 Welding shall be accomplished by any process that
2.
producesforgeorfusionweldsleavingnocrevicevisibletothe
9.2 The surface of the test specimen for the microscopical
unaided eye in the weld seam.
examination shall approximate a radial longitudinal section of
6.2.2.1 Forge—Welded Tube—The edges of the strip shall
the tube.
be heated to the required welding temperature, usually by a
high frequency electric current, and be pressed firmly together 10. Mechanical Properties
causing a forged-type joint to be formed with internal and
10.1 WM (as-welded) and WO (annealed) temper shall
external flash.
conform to the mechanical properties as specified in Table 2.
6.2.2.2 Fusion—Welded Tube—The edges of the tube shall
10.2 If disagreement arises between the grain size require-
be brought together and welded, usually by a GTAW welding
ment and the mechanical property requirements for annealed
process, without the addition of filler metal, causing a fusion-
tempers, the mechanical property requirements take precedent.
type joint to be formed with no internal or external flash.
6.2.2.3 Flash Removal—The external flash of forge welded
11. Performance Requirements
tubes, if present, shall be removed by scarfing. The internal
11.1 Expansion Requirements:
flash shall be treated by one of the following techniques: (1)
11.1.1 The annealed material shall be capable of being
IFI—internal flash to remain in the as-welded condition, (2)
expanded in accordance with Test Method B153 with an
IFR—internal flash to be removed by scarfing, and (3) IFD—
expansion of the outside diameter in the following percentage:
internal flash displaced by rolling or drawing.
6.2.3 The internal enhancement shall be produced by cold
forming. TABLE 2 Mechanical Property Requirements of As-Fabricated
and Annealed Tube
6.2.4 The longitudinal seam from welding shall be free of
filler metal. Elongation in
Average Grain Tensile Strength, Yield Strength,
Temper 2 in. (51 mm),
A B
Size, mm ksi (Mpa) ksi (Mpa)
min %
7. Chemical Composition
WM . . . 30 min (205 min) . . . . . .
7.1 The material shall conform to the requirements in Table
WO60 0.040 min. 30 min (205 min) 6 (40) min 35
1 for the copper specified in the contract or purchase order.
WO50 0.040 max 30 min (205 min) 9-15 (60 - 105) 35
7.2 These compositional limits do not preclude the possible A
ksi = 1000 psi.
B
presence of other unnamed elements. When required, limits Yield strength to be determined at 0.5 % extension under load.
B919 – 01 (2006)
that the product does not meet this requirement, the product
Outside Diameter, Expansion of Outside
in. (mm) Diameter, %
shall be subject to either rejection, or recall or both. See 18.4
for the test method.
0.750 in. (19.0) and under 30
Over 0.750 in. (19.0) 20 12.3 Cuprous Oxide Requirement:
12.3.1 Product manufactured from Copper UNS Alloy
11.1.2 The expanded tube shall show no cracking or rupture
C10200 shall be significantly free of cuprous oxide as deter-
visible to the unaided eye.
mined by Procedure A of Test Methods B577.
12. Other Requirements
13. Dimensions, Mass, and Permissible Variations
12.1 Nondestructive Examination for Defects:
13.1 The standard method for specifying tube diameters and
12.1.1 Each tube shall be subjected to an eddy-current test.
walls shall be decimal fractions of an inch.
Tubes shall normally be tested in the fabricated temper;
13.2 Tolerances on a given tube are permitted to be speci-
however, they may be tested in the annealed temper at the
fied with respect to any two but not all three of the following:
option of the manufacturer.
outside diameter, inside diameter, and bottom-wall thickness.
12.1.2 Electromagnetic (Eddy-Current) Test:
13.3 For the purposes of determining conformance with the
12.1.2.1 The testing shall follow the procedures specified in
dimensional requirements in this specification, any measured
Practice E243. Unless otherwise agreed upon between the
value outside the specified limiting values for any dimension
manufacturer, or supplier, and the purchaser, the manufacturer
shall be cause for rejection.
shall have the option of calibrating the test equipment using
13.4 Bottom-Wall Thickness Tolerances:
either notches or drilled holes. Notch depth standards rounded
13.4.1 Bottom-wall thickness tolerances shall conform to
to the nearest 0.001 in. (0.025 mm) shall be 22 % of the
the tolerances listed in Table 3 (See Fig. 1).
nominal,bottom-wallthickness.Drilledholestandardsshallbe
13.4.2 The wall thickness tolerances, listed in Table 3 for
0.025-in. (0.635-mm) diameter for tubes up to and including
tube furnished IFI, shall not apply to that portion of the tube
⁄4-in. (19.05-mm) specified diameter and 0.031-in. (0.785-
3 wall that contains the interior flash and weld upset.
mm) diameter for tubes over ⁄4-in. (19.05-mm) specified
diameter.
NOTE 2—The weld thickness shall not exceed the summation of the
12.1.2.2 Tubes that do not actuate the signaling device on bottom- wall thickness and the enhancement height.
the eddy-current tester shall be considered in conformance to
13.4.3 The tolerances of Table 3 shall be increased by
the requirements of this test.
100 % for tube furnished IFR and IFD for the portion of the
12.1.2.3 Tubes, rejected for irrelevant signals because of
tube wall that contains the weld zone.
moisture, soil, and or minor, mechanical damage, shall, at the
13.5 Diameter Tolerances:
option of the manufacturer, be reconditioned and retested.
13.5.1 The average diameter tolerances in Table 4 shall
12.1.2.4 Tubes that are reconditioned and retested (see
apply to both coils and straight lengths of product:
12.1.2.3) shall be considered to conform to the requirements of
13.5.2 For product furnished IFI, IFD, or IFR, the inside
this specification, if they do not cause output signals beyond
diameter shall not be taken so as to include the flash or
the acceptable limits.
flash-treated areas.
12.1.2.5 Unless otherwise specified, eddy-current disconti-
13.6 Lengths:
nuities will be identified on coils in excess of 200 ft. (6096 cm)
13.6.1 For coil lengths, see Table 5 of this specification. If
in length for subsequent removal by the purchaser.
coils are produced to a specified nominal weight, no coil shall
12.1.2.6 When required, the customer shall specify the
weigh less than 40 % of the nominal weight, and no more than
permissible number of identified eddy-current discontinuities.
20 % of the coils in a lot shall weigh less than 65 % of nominal
12.2 Cleanness Requirements:
weight unless otherwise agreed upon between the manufac-
12.2.1 The tube shall be capable of meeting the following
turer, or supplier, and purchaser.
cleanness requirement:
13.6.2 The tolerances for tubes furnished in straight lengths
12.2.1.1 The inside of the tube with closed ends shall be
shall be in accordance with Table 6.
sufficiently clean so that when tested in accordance with the
method given in 18.4, the residue remaining upon evaporation
2 2
TABLE 3 Bottom-Wall Tolerance
of the solvent shall not exceed 0.0035 g/ft (0.038 g/m)of
interior surface. Tolerance (Plus and Minus)
Outside Diameter, in. (mm)
Bottom-Wall Thickness,
12.2.1.2 The term “capable of” in the context of this
in. (mm)
0.125 to 0.625 Over 0.625 to 1.000
requirement shall mean that the testing and reporting of
(3 to 16), incl (16 to 25), incl
individual lots need not be performed by the producer of the
Up to 0.017 (0.43), incl. 0.001(0.025) 0.0015 (0.038)
product, if capability of the manufacturing process to meet this
Over 0.017 to 0.024 0.002 (0.050) 0.002 (0.050)
requirement has previously been established. However, should
(0.43 to 0.61), incl
subsequenttestingbyeithertheproducerorpurchaserestablish
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