ASTM B891-12
(Specification)Standard Specification for Seamless and Welded Titanium and Titanium Alloy Condenser and Heat Exchanger Tubes with Enhanced Surface for Improved Heat Transfer
Standard Specification for Seamless and Welded Titanium and Titanium Alloy Condenser and Heat Exchanger Tubes with Enhanced Surface for Improved Heat Transfer
ABSTRACT
This specification covers seamless and welded titanium and titanium 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 of a specific size. Tubes shall be furnished with unenhanced ends in the annealed condition and shall be suitable for rolling-in operations. Each tube shall be subject to a nondestructive eddy current test, and either a pneumatic or hydrostatic test.
SCOPE
1.1 This specification covers seamless and welded titanium and titanium alloy tubing on which at least part of the external or internal surface has been enhanced by cold forming for improved heat transfer. The tubes are used in surface condensers, evaporators, heat exchangers, coils, and similar heat transfer apparatus in diameters up to and including 1 in. (25.4 mm). The base tube wall thickness is typically at least 0.049 in. average, but lighter gauge may be negotiated with the manufacturer.
1.2 Tubing purchased to this specification will typically be inserted through close-fitting holes in tubesheets, baffles, or support plates spaced along the tube length such as defined in the Tubular Exchanger Manufacturer’s Association (TEMA) Standard. The tube ends will also be expanded, and may then be welded. Tube may also be bent to form U-tubes or be coiled or otherwise formed, although tight radii may require unenhanced length for the bends.
1.3 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 The following precautionary statement pertains to the test method portion only: Section 8, 9, 10 and S1 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 limitations prior to use.
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Designation:B891 −12
Standard Specification for
Seamless and Welded Titanium and Titanium Alloy
Condenser and Heat Exchanger Tubes with Enhanced
1
Surface for Improved Heat Transfer
This standard is issued under the fixed designation B891; 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* 2. Referenced Documents
4
2
2.1 ASTM Standards:
1.1 Thisspecification coversseamlessandweldedtitanium
A1047/A1047MTestMethodforPneumaticLeakTestingof
and titanium alloy tubing on which at least part of the external
Tubing
or internal surface has been enhanced by cold forming for
B338Specification for Seamless and Welded Titanium and
improved heat transfer. The tubes are used in surface
TitaniumAlloy Tubes for Condensers and Heat Exchang-
condensers, evaporators, heat exchangers, coils, and similar
ers
heat transfer apparatus in diameters up to and including 1 in.
E426PracticeforElectromagnetic(Eddy-Current)Examina-
(25.4 mm). The base tube wall thickness is typically at least
tion of Seamless and Welded Tubular Products, Titanium,
0.049in.average,butlightergaugemaybenegotiatedwiththe
Austenitic Stainless Steel and Similar Alloys
manufacturer.
E1316Terminology for Nondestructive Examinations
1.2 Tubing purchased to this specification will typically be
3. Terminology
inserted through close-fitting holes in tubesheets, baffles, or
support plates spaced along the tube length such as defined in
3.1 Definitions of Terms Specific to This Standard:
the Tubular Exchanger Manufacturer’s Association (TEMA)
3.1.1 base tube, n—theseamlessorweldedtubeconforming
3
Standard. The tube ends will also be expanded, and may then
to Specification B338 prior to enhancing.
bewelded.TubemayalsobebenttoformU-tubesorbecoiled
3.1.2 finished tube, n—the tube following enhancement and
or otherwise formed, although tight radii may require unen-
any heat treatment, forming, or other processing specified.
hanced length for the bends.
3.1.3 enhanced tube or section, n—all or sections of tube
1.3 The values stated in inch-pound units are to be regarded
length that have been mechanically worked inside, outside, or
as standard. The values given in parentheses are mathematical
both, to produce increased surface area for improved heat
conversions to SI units that are provided for information only
transfer.
and are not considered standard.
3.1.4 finned section, n—sections of tube exterior length that
1.4 The following precautionary statement pertains to the have been mechanically worked to produce increased surface
test method portion only: Section 8, 9, 10 and S1 of this area for improved heat transfer; see Table 1 for nomenclature
specification: This standard does not purport to address all of of finning details.
the safety concerns, if any, associated with its use. It is the
3.1.5 ribbed section, n—sections of tube interior length that
responsibility of the user of this standard to establish appro-
have been mechanically worked to produce increased surface
priate safety and health practices and determine the applica-
area for improved heat transfer; see Table 1 for nomenclature
bility of regulatory limitations prior to use.
of ribbing details.
3.1.6 plain ends, n—tube ends that have not been enhanced
toallowfortubeexpansionforwhichpropertiesareessentially
1
This specification is under the jurisdiction of ASTM Committee B10 on
identical to the base tube.
Reactive and Refractory Metals and Alloys and is the direct responsibility of
3.1.7 land, n—section of finished tube where the exterior
Subcommittee B10.01 on Titanium.
Current edition approved March 1, 2012. Published March 2012. Originally
and the interior surfaces have not been enhanced, to provide
approved in 1998. Last previous edition approved in 2004 as B891–(2004). DOI:
10.1520/B0891-12.
2 4
For ASME Boiler and Pressure Vessel Code applications, see related Specifi- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
cation SB-_____ in Section II of that Code. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Available from Tubular Exchanger Manufacturers Association, Inc. 25 North Standards volume information, refer to the standard’s Document Summary page on
Broadway Tarrytown, NY 10591, www.tema.org. 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
1
---------------------- Page: 1 ----------------------
B891−12
TABLE 1 ENHANCED TUBE NOMENCLATURE
3.2.1 as-enhanced tube, n—tube which is supplied with no
D O
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B891–98(Reapproved2004) Designation: B891 – 12
Standard Specification for
Seamless and Welded Titanium and Titanium Alloy
Condenser and Heat Exchanger Tubes With Integral
FinsSeamless and Welded Titanium and Titanium Alloy
Condenser and Heat Exchanger Tubes with Enhanced
1
Surface for Improved Heat Transfer
This standard is issued under the fixed designation B891; 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*
2
1.1 This specification covers seamless and welded titanium and titanium alloy tubing on which the external or internal surface,
orboth,hasbeenmodifiedbyacoldformingprocesstoproduceanintegralenhancedsurfaceforimprovedheattransfer.Thetubes
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).
1.2The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.
1.3The following precautionary statement pertains to the test method portion only: Section covers seamless and welded titanium
and titanium alloy tubing on which at least part of the external or internal surface has been enhanced by cold forming for improved
heat transfer. The tubes are used in surface condensers, evaporators, heat exchangers, coils, and similar heat transfer apparatus in
diametersuptoandincluding1in.(25.4mm).Thebasetubewallthicknessistypicallyatleast0.049in.average,butlightergauge
may be negotiated with the manufacturer.
1.2 Tubing purchased to this specification will typically be inserted through close-fitting holes in tubesheets, baffles, or support
3
plates spaced along the tube length such as defined in the Tubular Exchanger Manufacturer’sAssociation (TEMA) Standard. The
tubeendswillalsobeexpanded,andmaythenbewelded.TubemayalsobebenttoformU-tubesorbecoiledorotherwiseformed,
although tight radii may require unenhanced length for the bends.
1.3 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 The following precautionary statement pertains to the test method portion only: Section 8, 9of this specification:,10and
S1 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 limitations prior to use.
2. Referenced Documents
4
2.1 ASTM Standards: ASTM Standards:
A1047/A1047M Test Method for Pneumatic Leak Testing of Tubing
B338 Specification for Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers
E426 Practice for Electromagnetic (Eddy-Current) Examination of Seamless andWeldedTubular Products,Austenitic Stainless
Steel and Similar Alloys
E1316 Terminology for Nondestructive Examinations
1
This specification is under the jurisdiction of ASTM Committee B10 on Reactive and Refractory Metals and Alloys and is the direct responsibility of Subcommittee
B10.01 on Titanium.
´1
Current edition approved May 1, 2004. Published May 2004. Originally approved in 1998. Last previous edition approved in 1998 as B891–98 . DOI:
10.1520/B0891-98R04.
Current edition approved March 1, 2012. Published March 2012. Originally approved in 1998. Last previous edition approved in 2004 as B891 – (2004). DOI:
10.1520/B0891-12.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SB-_____ in Section II of that Code.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
3
Available from Tubular Exchanger Manufacturers Association, Inc. 25 North Broadway Tarrytown, NY 10591, www.tema.org.
4
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
*A Summary of Changes section appea
...
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