ASTM A688/A688M-08

Standard Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes

ABSTRACT
This specification covers standard requirements for welded austenitic stainless steel feedforward heater tubes including those bent, if specified, into the form of U-tubes for application in tubular feed-water heaters. All finished straight tubing or straight tubing ready for U-bending shall be furnished in the solution-annealed condition. The steel shall conform to the required chemical composition for carbon, phosphorus, chromium, molybdenum, nitrogen, and copper. The material shall also conform to tensile properties such as tensile strength, yield strength, and elongation. The steel shall undergo mechanical tests such as tension test, hardness test, reverse bend test, flattening test, flange test, pressure test, hydrostatic test, and air underwater test. Nondestructive test (electric test) shall be performed and corrosion resisting properties shall be determined for each sample tube.
SCOPE
1.1 This specification covers welded austenitic stainless steel feedwater heater tubes including those bent, if specified, into the form of U-tubes for application in tubular feed-water heaters.  
1.2 The tubing sizes covered shall be 5/8 to 1 in. [15.9 to 25.4 mm] inclusive outside diameter, and average or minimum wall thicknesses of 0.028 in. [0.7 mm] and heavier.  
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

General Information

• Status: Historical
• Publication Date: 29-Feb-2008
• ICS: 23.040.10 - Iron and steel pipes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.10 - Stainless and Alloy Steel Tubular Products

Relations

• Replaces: ASTM A688/A688M-07 - Standard Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes
• Effective Date: 01-Mar-2008
• Replaced By: ASTM A688/A688M-10 - Standard Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes
• Effective Date: 01-May-2010
• Referred By: ASTM A1012-10(2021) - Standard Specification for Seamless and Welded Ferritic, Austenitic and Duplex Alloy Steel Condenser and Heat Exchanger Tubes With Integral Fins
• Effective Date: 01-Mar-2008
• Referred By: ASTM A1016/A1016M-18a - Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
• Effective Date: 01-Mar-2008

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: A688/A688M – 08
Standard Specification for
1
Welded Austenitic Stainless Steel Feedwater Heater Tubes
This standard is issued under the fixed designationA688/A688M; 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* SAE J1086 Practice for Numbering Metals and Alloys
4
2 (UNS)
1.1 This specification covers welded austenitic stainless
steel feedwater heater tubes including those bent, if specified,
3. Terminology
into the form of U-tubes for application in tubular feed-water
3.1 Definitions Of Terms—For definitions of terms used in
heaters.
this specification, refer to Terminology A941.
5
1.2 The tubing sizes covered shall be ⁄8 to 1 in. [15.9 to
25.4 mm] inclusive outside diameter, and average or minimum
4. Ordering Information
wall thicknesses of 0.028 in. [0.7 mm] and heavier.
4.1 It is the responsibility of the purchaser to specify all
1.3 The values stated in either inch-pound units or SI units
requirements that are necessary for material under this speci-
are to be regarded separately as standard. Within the text, the
fication.Suchrequirementsmayinclude,butarenotlimitedto,
SI units are shown in brackets. The values stated in each
the following:
system are not exact equivalents; therefore, each system shall
4.1.1 Quantity (length or number of pieces),
beusedindependentlyoftheother.Combiningvaluesfromthe
4.1.2 Material description,
two systems may result in nonconformance with the specifi-
4.1.3 Dimensions—Outside diameter, wall thickness (mini-
cation.
mum or average wall), and length,
2. Referenced Documents 4.1.4 Grade (chemical composition) (Table 1),
3 4.1.5 U-bend requirements, if order specifies bending,
2.1 ASTM Standards:
U-bend schedules or drawings shall accompany the order,
A262 Practices for Detecting Susceptibility to Intergranular
4.1.6 Optional requirements—Purchaser shall specify if an-
Attack in Austenitic Stainless Steels
nealing of the U-bends is required or whether tubes are to be
A480/A480M Specification for General Requirements for
hydrotested or air tested (see 11.6)
Flat-Rolled Stainless and Heat-Resisting Steel Plate,
4.1.7 Supplementary requirements—Purchaser shall
Sheet, and Strip
specify on the purchase order if material is to be eddy current
A941 Terminology Relating to Steel, Stainless Steel, Re-
tested in accordance with Supplementary Requirements S1 or
lated Alloys, and Ferroalloys
S2,andifspecialtestreportsarerequiredunderSupplementary
A1016/A1016M Specification for General Requirements
Requirement S3, and,
for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stain-
4.1.8 Any special requirements.
less Steel Tubes
E527 Practice for Numbering Metals and Alloys in the
5. General Requirements
Unified Numbering System (UNS)
5.1 Material furnished to this specification shall conform to
2.2 Other Standard:
the applicable requirements of the latest published edition of
Specification A1016/A1016M unless otherwise provided
herein.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
6. Materials and Manufacture
A01.10 on Stainless and Alloy Steel Tubular Products.
6.1 The tube shall be made from flat-rolled steel by an
Current edition approved March 1, 2008. Published March 2008. Originally
approved in 1973. Last previous edition approved in 2007 as A688/A688M–07.
automatic welding process with no addition of filler metal.
DOI: 10.1520/A0688_A0688M-08.
6.2 Subsequent to welding and prior to final heat treatment,
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
the tubes shall be cold worked either in both the weld and base
cation SA-688 in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4
Standards volume information, refer to the standard’s Document Summary page on Available from Society of Automotive Engineers (SAE), 400 Commonwealth
the ASTM website. Dr., Warrendale, PA 15096-0001, http://www.sae.org.
*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 ----------------------
A688/A688M – 08
TABLE 1 Chemical Requirements
Grade. TP 304 TP 304L TP 304LN TP 316 TP 316L TP 316LN TP XM-29 TP 304N TP 316N . . . . . . . . . . . .
UNS S30400 S30403 S30453 S31600 S31603 S31653 S24000 S30451 S31651 N08367 N08926 S31254 S32654
Element
A
Designa
...

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:A688/A688M–07 Designation: A 688/A 688M – 08
Standard Specification for
1
Welded Austenitic Stainless Steel Feedwater Heater Tubes
ThisstandardisissuedunderthefixeddesignationA688/A688M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope*
2
1.1 This specification covers welded austenitic stainless steel feedwater heater tubes including those bent, if specified, into the
form of U-tubes for application in tubular feed-water heaters.
5
1.2 The tubing sizes covered shall be ⁄8 to 1 in. [15.9 to 25.4 mm] inclusive outside diameter, and average or minimum wall
thicknesses of 0.028 in. [0.7 mm] and heavier.
1.3 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in nonconformance with the specification.
2. Referenced Documents
3
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and
Strip
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel
Tubes
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 Other Standard:
4
SAE J1086 Practice for Numbering Metals and Alloys (UNS)
3. Terminology
3.1 Definitions Of Terms—For definitions of terms used in this specification, refer to Terminology A941.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material under this specification.
Such requirements may include, but are not limited to, the following:
4.1.1 Quantity (length or number of pieces),
4.1.2 Material description,
4.1.3 Dimensions—Outside diameter, wall thickness (minimum or average wall), and length,
4.1.4 Grade (chemical composition) (Table 1),
4.1.5 U-bend requirements, if order specifies bending, U-bend schedules or drawings shall accompany the order,
4.1.6 Optional requirements—Purchaser shall specify if annealing of the U-bends is required or whether tubes are to be
hydrotested or air tested (see 11.6)
4.1.7 Supplementary requirements—Purchaser shall specify on the purchase order if material is to be eddy current tested in
accordancewithSupplementaryRequirementsS1orS2,andifspecialtestreportsarerequiredunderSupplementaryRequirement
S3, and,
4.1.8 Any special requirements.
1
ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.10
on Stainless and Alloy Steel Tubular Products.
Current edition approved Nov.March 1, 2007.2008. Published December 2007.March 2008. Originally approved in 1973. Last previous edition approved in 20042007 as
A688/A688M–047.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-688 in Section II of that Code.
3
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,[e-mail] Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.
*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 ----------------------
A 688/A 688M – 08
TABLE 1 Chemical Requirements
Grade. TP 304 TP 304L TP 304LN TP 316 TP 316L TP 316LN TP XM-29 TP 304N TP 316N . . . . . . . . . . . .
UNS S30400 S30403 S30453 S31600 S31603 S31653 S24000 S30451 S31651 N08367 N08926 S31254 S32654
Element
A
Designation .
Composition, %
Carbon, max 0.08 0.035 0.035 0.08 0.035 0.035 0.060 0.08 0.08 0.030 0.020 0.020 0.020
B
Manganese, max 2.00 2.00 2.00 2.00 2.00 2.00 11.50– 2.00 2.00 2.00 2.00 1.00 2.0–4.0
14.50
Phosphorus, max 0.040 0.040 0.040 0.040 0.040
...

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:A 688/A 688M–07 Designation: A688/A688M – 08
Standard Specification for
1
Welded Austenitic Stainless Steel Feedwater Heater Tubes
This standard is issued under the fixed designationA688/A688M; 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
1.1 This specification covers welded austenitic stainless steel feedwater heater tubes including those bent, if specified, into the
form of U-tubes for application in tubular feed-water heaters.
5
1.2 The tubing sizes covered shall be ⁄8 to 1 in. [15.9 to 25.4 mm] inclusive outside diameter, and average or minimum wall
thicknesses of 0.028 in. [0.7 mm] and heavier.
1.3 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in nonconformance with the specification.
2. Referenced Documents
3
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A480/A480M SpecificationforGeneralRequirementsforFlat-RolledStainlessandHeat-ResistingSteelPlate,Sheet,andStrip
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel
Tubes
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 Other Standard:
4
SAE J1086 Practice for Numbering Metals and Alloys (UNS)
3. Terminology
3.1 Definitions Of Terms—For definitions of terms used in this specification, refer to Terminology A 941A941.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material under this specification.
Such requirements may include, but are not limited to, the following:
4.1.1 Quantity (length or number of pieces),
4.1.2 Material description,
4.1.3 Dimensions—Outside diameter, wall thickness (minimum or average wall), and length,
4.1.4 Grade (chemical composition) (Table 1),
4.1.5 U-bend requirements, if order specifies bending, U-bend schedules or drawings shall accompany the order,
4.1.6 Optional requirements—Purchaser shall specify if annealing of the U-bends is required or whether tubes are to be
hydrotested or air tested (see 11.6)
4.1.7 Supplementary requirements—Purchaser shall specify on the purchase order if material is to be eddy current tested in
accordancewithSupplementaryRequirementsS1orS2,andifspecialtestreportsarerequiredunderSupplementaryRequirement
S3, and,
4.1.8 Any special requirements.
1
ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.10
on Stainless and Alloy Steel Tubular Products.
Current edition approved Nov. 1, 2007. Published December 2007. Originally approved in 1973. Last previous edition approved in 2004 as A 688/A 688M–04.
Current edition approved March 1, 2008. Published March 2008. Originally approved in 1973. Last previous edition approved in 2007 as A688/A688M–07. DOI:
10.1520/A0688_A0688M-08.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-688 in Section II of that Code.
3
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,[e-mail] Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.
*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 ----------------------
A688/A688M – 08
TABLE 1 Chemical Requirements
Grade. TP 304 TP 304L TP 304LN TP 316 TP 316L TP 316LN TP XM-29 TP 304N TP 316N . . . . . . . . . . . .
UNS S30400 S30403 S30453 S31600 S31603 S31653 S24000 S30451 S31651 N08367 N08926 S31254 S32654
Element
A
Designation .
Composition, %
Carbon, max 0.08 0.035 0.035 0.08 0.035 0.035 0.060 0.08 0.08 0.
...