ASTM B924-02(2006)
(Specification)Standard Specification for Seamless and Welded Nickel Alloy Condenser and Heat Exchanger Tubes With Integral Fins
Standard Specification for Seamless and Welded Nickel Alloy Condenser and Heat Exchanger Tubes With Integral Fins
ABSTRACT
This specification covers seamless and welded nickel alloy tubing with either or both external and internal surfaces have been modified by cold forming. The cold forming process produces an enhanced surface for improved heat transfer in the tubing that makes these ideal for use in surface condensers, evaporators, heat exchangers and other similar heat transfer apparatus. The material properties and manufacturing conditions of the seamless and welded materials should conform accordingly.
SCOPE
1.1 This specification describes seamless and welded nickel alloy tubing on which the external or internal surface, or both, has been modified by a cold forming process to produce an integral enhanced surface, for improved heat transfer. The tubes are used in surface condensers, evaporators, heat exchangers and similar heat transfer apparatus in unfinned end diameters up to and including 1 in. (25.4 mm).
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following precautionary statement pertains to the test method portion only: Section 10 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory requirements prior to use.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B924 – 02 (Reapproved 2006)
Standard Specification for
Seamless and Welded Nickel Alloy Condenser and Heat
Exchanger Tubes With Integral Fins
This standard is issued under the fixed designation B924; 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 (UNS N06600, N06601, N06603, N06690, N06693,
2 N06025, N06045, and N06696), Nickel-Chromium-
1.1 This specification describes seamless and welded
Cobalt-Molybdenum Alloy (UNS N06617), and Nickel-
nickel alloy tubing on which the external or internal surface, or
Iron-Chromium-Tungsten Alloy (UNS N06674) Seamless
both, has been modified by a cold forming process to produce
Pipe and Tube
an integral enhanced surface, for improved heat transfer. The
B407 Specification for Nickel-Iron-ChromiumAlloy Seam-
tubes are used in surface condensers, evaporators, heat ex-
less Pipe and Tube
changers and similar heat transfer apparatus in unfinned end
B423 Specification for Nickel-Iron-Chromium-
diameters up to and including 1 in. (25.4 mm).
Molybdenum-Copper Alloy (UNS N08825, N08221, and
1.2 The values stated in inch-pound units are to be regarded
N06845) Seamless Pipe and Tube
as standard. The values given in parentheses are mathematical
B444 Specification for Nickel-Chromium-Molybdenum-
conversions to SI units that are provided for information only
Columbium Alloys (UNS N06625 and UNS N06852) and
and are not considered standard.
Nickel-Chromium-Molybdenum-Silicon Alloy (UNS
1.3 The following precautionary statement pertains to the
N06219) Pipe and Tube
test method portion only: Section 10 of this specification. This
B468 Specification for Welded UNS N08020 Alloy Tubes
standard does not purport to address all of the safety concerns,
B515 Specification for Welded UNS N08120, UNS
if any, associated with its use. It is the responsibility of the user
N08800, UNS N08810, and UNS N08811 Alloy Tubes
of this standard to become familiar with all hazards including
B516 Specification for Welded Nickel-Chromium-Iron Al-
those identified in the appropriate Material Safety Data Sheet
loy (UNS N06600, UNS N06603, UNS N06025, and UNS
(MSDS) for this product/material as provided by the manufac-
N06045) Tubes
turer, to establish appropriate safety and health practices, and
B622 Specification for Seamless Nickel and Nickel-Cobalt
determine the applicability of regulatory requirements prior to
Alloy Pipe and Tube
use.
B626 Specification for Welded Nickel and Nickel-Cobalt
2. Referenced Documents
Alloy Tube
B674 Specification for UNS N08925, UNS N08354, and
2.1 ASTM Standards:
UNS N08926 Welded Tube
A941 Terminology Relating to Steel, Stainless Steel, Re-
B676 Specification for UNS N08367 Welded Tube
lated Alloys, and Ferroalloys
B677 Specification for UNS N08925, UNS N08354, and
B163 Specification for Seamless Nickel and Nickel Alloy
UNS N08926 Seamless Pipe and Tube
(UNS N06845) Condenser and Heat-Exchanger Tubes
B690 Specification for Iron-Nickel-Chromium-
B167 Specification for Nickel-Chromium-Iron Alloys
Molybdenum Alloys (UNS N08366 and UNS N08367)
Seamless Pipe and Tube
B704 Specification forWelded UNS N06625, UNS N06219
This specification is under the jurisdiction of ASTM Committee B02 on
and UNS N08825 Alloy Tubes
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys. B729 Specification for Seamless UNS N08020, UNS
Current edition approved Dec. 1, 2006. Published December 2006. Originally
N08026, and UNS N08024 Nickel-Alloy Pipe and Tube
approved in 2002. Last previous edition approved in 2002 as B924 - 02. DOI:
B751 Specification for General Requirements for Nickel
10.1520/B0924-02R06.
and Nickel Alloy Welded Tube
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SB-924 in Section II of that Code.
B829 Specification for General Requirements for Nickel
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and Nickel Alloys Seamless Pipe and Tube
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B924 – 02 (2006)
B899 Terminology Relating to Non-ferrous Metals and
Alloys
E426 Practice for Electromagnetic (Eddy-Current) Exami-
nation of Seamless and Welded Tubular Products, Auste-
nitic Stainless Steel and Similar Alloys
E571 Practice for Electromagnetic (Eddy-Current) Exami-
nation of Nickel and Nickel Alloy Tubular Products
3. Terminology
3.1 For definition of general terms used in this specification,
FIG. 2 Outside and Inside Enhancement
refer to Terminologies A941 and B899.
3.2 Definitions of Terms Specific to this Document (Integral
Fin Tube Nomenclature):
4.1.9 Nondestructive tests,
D = outside diameter of unenhanced section
4.1.10 Customer inspection,
D = inside diameter of unenhanced section
i
4.1.11 Mill test report, and
d = root diameter of enhanced section outside of tube
r
4.1.12 Certification.
d = outside diameter of enhanced section
o
d = inside diameter of enhanced section
i
5. General Requirements
W = wall thickness of unenhanced section
W = wall thickness of enhanced section 5.1 Seamless material furnished under this specification
f
F = height of fin—enhanced section outside of tube shall conform to the requirements of Specification B829,
h
F = mean fin thickness—enhanced section outside of tube unless otherwise provided herein.
m
P = mean rib pitch—enhanced section inside of tube
5.2 Welded material furnished under this specification shall
R = height of rib—enhanced section inside of tube conform to the applicable requirements of Specification B751,
h
H = rib helix angle—enhanced section inside of tube
unless otherwise provided herein.
a
T = transition taper 5.3 Enhanced (integrally finned) sections of the tube shall
t
be produced by cold forming the tubing in such a manner that
4. Ordering Information
exterior fins, wall under the fin and inside ribs (when specified)
4.1 It is the responsibility of the purchaser to specify all are homogeneous.
requirements that are necessary for material ordered under this 5.4 Tubes described by this specification shall be furnished
specification. Such requirements may include, but are not with unenhanced (plain) ends.
limited to, the following: 5.5 Enhanced sections of the tube are normally supplied in
4.1.1 ASTM designation and year of issue (this specifica- the “as finned” temper (cold worked condition produced by the
tion), enhancing operation). The unenhanced sections of the tube
4.1.2 ASTM designation and year of issue (plain tube shall be in the annealed condition and shall be suitable for
specification), rolling-in operations.
4.1.3 Welded or seamless,
4.1.4 Alloy grade and UNS designation, 6. Materials and Manufacture
4.1.5 Dimensions; plain tube outside diameter, plain tube
6.1 The integrally enhanced (finned) tubes shall be manu-
wall thickness (ave. or min. specified), length and location of
factured from seamless, welded, or welded/cold worked plain
unenhancedsurfacesandthetotaltubelength.Configurationof
tubes that conform to one of the following ASTM specifica-
enhanced surfaces (fins per unit length, fin height, wall
tions: B163, B167, B407, B423, B444, B468, B515, B516,
thicknessunderfin,ribpitch,ribheight,etc.)shallbeasagreed
B622, B626, B674, B676, B677, B690, B704, and B729.
upon between the manufacturer and purchaser. (Refer to Figs.
1 and 2).
7. Temper
4.1.6 Temper (as-finned or stress relief annealed),
7.1 The tube after enhancing shall normally be supplied in
4.1.7 Quantity,
the as-finned temper. When specified by the purchaser, for
4.1.8 Packaging,
bending, coiling or other fabricating operations, enhanced
portions of the tube may be stress relief annealed or solution
annealed.
7.2 Heat treatment of enhanced sections and bend areas, or
both, shall be in accordance with the governing plain tube
specification.
8. Chemical Composition
8.1 The tubing specified shall conform to the chemical
requirements prescribed in the governing plain tube specifica-
FIG. 1 Outside Enhancement Only tion.
B924 – 02 (2006)
9. Tensile Requirements detection of any leakage either by placing the tube under water
or by using the pressure differential method as follows:
9.1 The tube prior to the finning operation, and unenhanced
10.1.2.1 Air Underwater Pressure Test—Each tube shall be
portions of the finned tube, shall conform to the requirements
tested in accordance with Specification B751 except using test
for tensile properties prescribed in the governing plain tube
pressure specified in 10.1.2.
specification.
10.1.2.2 Pressure Differential Test—Procedure and accep-
tance criteria shall be agreed upon between the manufacturer
10. Test Requirements
and purchaser.
10.1 After enhancing operations, subject each tube to a
10.1.3 Hydrostatic Test—When examined with this method,
nondestructive electromagnetic test, and either a pneumatic or
each tube shall be tested to an internal hydrostatic test pressure
hydrostatic test as specified in the purchase order. Tubes shall
of 1000 psi (6.9 MPa) provided that the fiber stress, calculated
normally be tested in the as-fabricated condition but, at the
in accordance with the following equation, does not exceed the
option of the manufacturer or purchaser, may be tested in the
allowable fiber stress, S, indicated as follows:
stress relief annealed condition.
P 5 2SW / d (1)
10.1.1 Eddy Current Test—Eddy current inspect the tube in f r
accordance with Practice E426 or E571, by passing it through
where:
anencirclingcoildesignedtotesttheentirecrosssectionofthe
P = hydrostatic test pressure, psi (MPa),
tube.
S = allowable fiber stress, for material in the condition
10.1.1.1 The reference standard used to adjust the sensitiv-
(temper) furnished as specified in the product speci
...
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