ASTM B903-00

Standard Specification for Seamless Copper Heat Exchanger Tubes With Internal Enhancement

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 The values stated in inch-pound units are the standard. SI values are given in parentheses for information only.
1.3 Tubes for this application are manufactured from the following copper:
Copper UNS No.Type of MetalC12200Phosphorized, high residual phosphorus (DHP)
The following pertains to the test method described in 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.

General Information

• Status: Historical
• Publication Date: 09-Mar-2000
• ICS: 23.040.15 - Non-ferrous metal pipes
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.04 - Pipe and Tube

Relations

• Replaced By: ASTM B903-00(2005) - Standard Specification for Seamless Copper Heat Exchanger Tubes With Internal Enhancement
• Effective Date: 01-Mar-2005

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B 903 – 00
Standard Specification for
Seamless Copper Heat Exchanger Tubes With Internal
Enhancement
This standard is issued under the fixed designation B 903; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope Copper Alloys (Photometric Methods)
E 112 Test Methods for Determining Average Grain Size
1.1 Thisspecificationestablishestherequirementsforseam-
E 243 Practice for Electromagnetic (Eddy-Current) Exami-
less, internally enhanced copper tube, in straight lengths or
nation of Copper and Copper-Alloy Tubes
coils, suitable for use in refrigeration and air-conditioning
E 255 Practice for Sampling Copper and CopperAlloys for
products or other heat exchangers.
Determination of Chemical Composition
1.2 The values stated in inch-pound units are the standard.
SI values are given in parentheses for information only.
3. General Requirements
1.3 Tubes for this application are manufactured from the
3.1 The following sections of Specification B 251 constitute
following copper:
a part of this specification:
Copper UNS No. Type of Metal
3.1.1 Workmanship, Finish, and Appearance.
C12200 Phosphorized, high residual phosphorus (DHP)
3.1.2 Sampling.
3.1.3 Number of Tests and Retests.
1.4 The following pertains to the test method described in
3.1.4 Specimen Preparation.
15.4 of this specification: This standard does not purport to
3.2 In addition, when a section with a title identical to those
address all the safety concerns, if any, associated with its use.
referenced in 5.1 appears in this specification, it contains
It is the responsibility of the user of this standard to establish
additional information which supplements those appearing in
appropriate safety and health practices and determine the
Specification B 251. In case of conflict, this specification shall
applicability of regulatory limitations prior to use.
prevail.
2. Referenced Documents
4. Terminology
2.1 ASTM Standards:
4.1 Definitions—For the definition of terms related to cop-
B 153 Test Method for Expansion (Pin Test) of Copper and
2 per and copper alloys refer to Terminology B 846.
Copper-Alloy Pipe and Tubing
4.1.1 bottom wall, n—the wall thickness measured from the
B 251 Specification for General Requirements for Wrought
2 base of the enhancement to the outside surface.
Seamless Copper and Copper-Alloy Tube
4.1.2 coil, n—a length of the product wound into a series of
B 601 Practice for Temper Designations for Copper and
2 connected turns.
Copper Alloys—Wrought and Cast
4.1.3 enhancement, adj—a geometrical feature intentionally
B 846 Terminology for Copper and Copper Alloys
3 formed on a tube I.D. surface to improve heat transfer.
E 3 Practice for Preparation of Metallographic Specimens
4.1.4 level wound, adj—a coil in which the turns are wound
E 8 Test Methods forTensionTesting of Metallic Materials
into layers parallel to the axis of the coil such that successive
E 29 Practice for Using Significant Digits in Test Data to
turns in a given layer are next to one another.
Determine Conformance with Specifications
4.2 Definitions of Terms Specific to This Standard:
E 53 Methods for Chemical Analysis of Copper
4.2.1 unaided eye, n—visual inspection, without the use of
E 62 Test Methods for Chemical Analysis of Copper and
special equipment or enhancement excepting the use of cor-
rective lenses.
This specification is under the jurisdiction of ASTM Committee B-05 on
5. Ordering Information
Copper and CopperAlloys and is the direct responsibility of Subcommittee B05.04
on Pipe and Tube. 5.1 Orders for products under this specification should
Current edition approved March 10, 2000. Published May 2000.
include the following information:
Annual Book of ASTM Standards, Vol 02.01.
5.1.1 ASTM Designation number and the year of issue.
Discontinued. See 1982 Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 14.02.
6 7
Annual Book of ASTM Standards, Vol 03.05. Annual Book of ASTM Standards, Vol 03.03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B903–00
TABLE 2
5.1.2 Temper.
5.1.3 Length, diameter, wall, and enhancement dimensions. Temper Average Grain Size, mm
Configuration of the enhanced surface shall be as agreed upon
As fabricated —
O60 0.040 min
between the manufacturer, or supplier, and purchaser.
O50 0.040 max
5.1.4 How furnished: straight or coils.
5.1.5 Quantity.
5.1.6 Certification, if required (see Section 19).
TABLE 3 Mechanical Property Requirements of Designated
5.1.7 Mill test report, if required (see Section 20).
Tempers
Temper Tensile Strength, Yield Strength, Elongation in 2 in.,
6. Materials and Manufacture
A B
Designation Min, ksi (Mpa) ksi (Mpa) min %
6.1 Material:
As-fabricated 36 (245) 30 (205) min —
O60 30 (205) 6 (40) min 40
6.1.1 The material of manufacture shall be cast billet, bar,
O50 30 (205) 9–15 (60–105) 40
tube, or so forth of Copper UNS No. C12200 and shall be of
A
ksi = 1000 psi.
such purity and soundness as to be suitable for processing into
B
Yield strength to be determined at 0.5 % extension under load.
the tubular product described herein.
6.2 Manufacture:
6.2.1 The tube shall be manufactured by such hot- and
11. Performance Requirements
cold-working processes needed to produce a homogenous,
11.1 Expansion Test:
uniform wrought structure in the finished product.
11.1.1 Specimens of annealed product shall withstand the
6.2.2 The internal enhancement shall be produced by cold
expansionshowninTable4whenexpandedinaccordancewith
forming.
Test Method B 153.
6.2.2.1 When annealed temper is required, the tube shall be
11.1.2 The expanded tube shall show no cracking or rupture
annealed subsequent to the final cold-forming operation.
visible to the unaided eye.
7. Chemical Composition
12. Other Requirements
7.1 Thematerialshallconformtotherequirementsspecified
12.1 Nondestructive Examination for Defects:
in Table 1 as to chemical composition.
12.1.1 Each tube shall be subjected to an eddy-current test.
7.2 These specification limits do not preclude the possible
12.1.2 Electromagnetic (Eddy-Current) Test:
presence of other unnamed elements. By agreement between
12.1.2.1 Tubes shall be tested normally in the fabricated
the manufacturer, or supplier, and the purchaser, analysis may
temper; however, they may be tested in the annealed temper at
be required and limits established for elements not specified.
the option of the manufacturer.
12.1.2.2 The testing shall follow the procedures specified in
8. Temper
Practice E 243. Unless otherwise agreed upon between the
8.1 As-Fabricated Temper—The tube is in the cold-worked
manufacturer, or supplier, and the purchaser, the manufacturer
condition produced by the enhancing operation.
shall have the option of calibrating the test equipment using
8.2 O (Annealed) Temper—The temper of annealed tube
either notches or drilled holes. If agreement cannot be reached,
shall be designated as O50 (light-anneal) or O60 (soft-anneal)
drilled holes shall be used. Notch depth standards rounded to
(see Table 2). Tempers are defined in Practice B 601.
the nearest 0.001 in. (0.025 mm) shall be 22 % of the nominal
bottomwallthickness.Drilled-holestandardsshallbe0.025-in.
NOTE 1—By agreement between the purchaser and manufacturer,
productinspecialtempersmaybesuppliedwithpropertiesasagreedupon (0.635-mm) diameter for tubes up to and including ⁄4-in.
between the purchaser and the manufacturer.
specified diameter and 0.031-in. (0.785-mm) diameter for
tubes over ⁄4-in. specified diameter.
9. Grain Size of Annealed Tempers
12.1.2.3 Tubes that do not actuate the signaling device on
9.1 Samples of annealed temper tubes shall be examined at
theeddy-currenttestershallbeconsideredasconformingtothe
a magnification of 75 diameters. The grain size shall be
requirements of this test.
determined in the wall beneath the ridges. The microstructure
12.1.2.4 Tubes, rejected for irrelevant signals because of
shallshowcompleterecrystallizationandshallhaveanaverage
moisture, soil, and like effects, may be reconditioned and
grain size within the limits specified in Table 2, when tested in
retested.
accordance with Test Method E 112.
12.1.2.5 Tubes that are reconditioned and retested (see
12.1.2.4) shall be considered to conform to the requirements of
10. Mechanical Properties
this specification, if they do not cause output signals beyond
10.1 As-fabricated and O (annealed) temper tube shall
the acceptable limits.
conform to the mechanical properties specified in Table 3.
TABLE 4 Expansion of Annealed Product
TABLE 1 Chemical Requirements, UNS C12200
Outside Diameter, Expansion of Outside Diameter, %
Element Composition, wt % in. (mm)
Copper (including silver) 99.9, min ⁄4 (19.0) and under 30
Phosphorus 0.015–0.040 Over ⁄4 (19.0) 20
B903–00
TABLE 6 Average Diameter Tolerances
12.1.2.6 Eddy-current discontinuities will be identified on
coils in excess of 200 ft (6096 cm) in length for subsequent Tolerance, Plus and Minus,
Specified Diameter, in. (mm)
in. (mm)
removal by the purchaser.
0.125 to 0.625 (3 to 16), incl 0.002 (0.050)
12.1.2.7 At the customer’s discretion, the permissible num-
Over 0.625 to 1.000 (16 to 25), incl 0.0025 (0.063)
ber of identified eddy-current discontinuities may be specified.
12.2 Cleanness Requirements:
12.2.1 The tube shall be capable of meeting the following TABLE 7 Coil Length Tolerances (Specific Lengths)
cleanness requirement:
Shortest
Tube Permissible Maximum
12.2.1.1 The inside of the tube with closed ends shall be
Outside Nominal Length, % Permissible Tolerance
sufficientlycleansothatwhentheinteriorofthetubeiswashed
Diameter, Length, of Nominal Weight of Ends, All Plus,
with a suitable solvent, such as redistilled chloroform or
in. (mm) ft (m) Length % of Lot Weight ft (m)
redistilled trichloroethylene, the residue remaining upon
All sizes Up to 100 100 0 1 (0.3)
evaporation of the solvent shall not exceed 0.0035 g/ft (0.038 (30.5), incl.
g/m ) of interior surface. See 15.4 for the test method.
All sizes Over 100 40 20 . . .
12.2.1.2 The term “capable of” in the context of this
(30.5)
requirement shall mean that the testing and reporting of
individual lots need not be performed by the producer of the
product, if capability of the manufacturing process to meet this TABLE 8 Length Tolerances for Straight Lengths
requirement has previously been established; however, subse-
NOTE 1—Tolerances are all plus; if all minus tolerances are desired, use
quent testing by either the producer or purchaser should
the same values; if tolerances of plus and minus are desired, halve the
establish that the product does not meet this requirement, the
values given.
product shall be subject to either rejection, or recall or both.
Length Tolerance, in. (mm)
Up to 6 in. (152 mm), incl. ⁄16 (1.6)
13. Dimensions, Mass, and Permissible Variations 1
Over 6 in. (152 mm) to 2 ft (610 m), incl. ⁄16 (1.6)
Over 2 ft (610 m) to 6 ft (1.83 m), incl. ⁄32 (2.38)
13.1 The standard method for specifying tube diameters and
Over 6 ft (1.83 m) to 14 ft (4.27 m) ⁄4 (6.3)
walls shall be decimal fractions of an inch. 1
Over 14 ft (1.83 m) ⁄2 (12.7)
13.2 Tolerances on a given tube are permitted to be speci-
fied with respect to any two but not all three of the following:
outside diameter, inside diameter, and bottom wall thickness.
13.7.1 The roundness tolerance for material in straight
13.3 For the purposes of determining conformance with the
lengths shall be 1.5 % of the OD expressed to the nearest 0.001
dimensional requirements in this specification, any measured
in. (0.025 mm).
value outside the specified limiting values for any dimension
13.7.2 The roundness tolerance for material in coils shall be
shall be cause for rejection.
6.5 % of the OD expressed to the nearest 0.001 in. (0.025 mm).
13.4 Bottom Wall Thickness Tolerances—Bottom wall
13.8 Squareness of Cut—For tube in straight lengths, the
thickness tolerances shall conform to the tolerances listed in
departure from squareness of the end of any tube shall not
Table 5.
exceed the following:
13.5 Diameter Tolerances—The average diameter toler-
Specified Outside Diameter in. (mm) Tolerance
ances in Table 6 shall apply to both coils and straight lengths
of product.
Up to 0.625 (15.9), incl. 0.010 in. (0.25 mm)
13.6 Lengths:
Over 0.625 (15.9) 0.016 in./in. (0.406 mm/mm)
13.6.1 For coil lengths, see Table 7 of this specification. If
13.9 Straightness—For tubes in any as fabricated temper,
coils are produced to a specified nominal weight, no coil shall
the straightness tolerance shall be in accordance with Table 9.
weigh less than 40 % of the nominal weight, and no more than
20 % of the coils in a lot shall weigh less than 65 % of nominal
14. Specimen Preparation
weight unless otherwise agreed upon between the manufac-
14.1 Chemical Analysis:
turer, or supplier, and purchaser.
14.1.1 Sample preparation shall be in accordance with
13.6.2 The tolerances for tubes furnished in straight lengths
Practice E 255.
shall be in accordance with Table 8.
14.1.2 Analytical specimen preparation shall be the respon-
13.7 Roundness:
sibility of the reporting laboratory.
TABLE 5 Bottom Wall Tolerance
TABLE 9 Straightness Tolerance for Tubes
Tolerance (Plus and Minus)
Bottom Wall Thickness, in. (mm)
Outside Diameter, in. (mm) Length, Maximum Curvature (Depth of Arc),
ft (m) in. (mm)
0.125 to 0.625 Over 0.625 to 1.000
(3 to 16), incl (16 to 25), incl Over 3 (0.914) to 6 (1.83), incl. ⁄16 (4.8)
Up to 0.017 (0.43), incl. 0.001 (0.025) 0.0015 (0.038) Over 6 (1.83) to 8 (2.44), incl. ⁄16 (7.9)
Over 0.017 to 0.024 (0.43 to 0.61), 0.002 (0.050) 0.002 (0.050) Over 8 (2.44) to 10 (3.05), incl. ⁄2 (13)
incl Over 10 (3.05) ⁄2 (13) in any 10-ft (3.05-m) section
B903–00
14.2 Tensile Tests—Because some internal-enhancement avoided to prevent charring of the residue. The container shall
configurations may cause breakage of the specimen in the then be dried in an oven at 100 to 110°C for 10 min, cooled in
grips, specimen ends may be flattened and tested using wedge a desiccator, and weighed. A blank determination shall be run
or sheet metal grips. with the same volume of solvent and the gain in weight for the
14.3 Grain-Size—The test specimen shall be prepared in blank shall be subtracted from the weight of the residue
accordance with Test Method E 3 and shall be a radial sample. The corr
...