ASTM A254/A254M-12(2019)

Standard Specification for Copper-Brazed Steel Tubing

ABSTRACT
This specification covers double-wall, copper brazed steel tubing suitable for general engineering uses, particularly in the automotive, refrigeration, and stove industries for fuel lines, brake lines, oil lines, heating and cooling units, and the like. The tubing shall be made by rolling steel strip into the form of tubing and subsequently copper brazing in a reducing atmosphere. The steel shall conform to the prescribed chemical composition and shall be subjected to heat analysis and product analysis. Tension, flattening, expansion, bending, and pressure proof tests shall be made in accordance with the specification.
SCOPE
1.1 This specification covers double-wall, copper-brazed steel tubing suitable for general engineering uses, particularly in the automotive, refrigeration, and stove industries for fuel lines, brake lines, oil lines, heating and cooling units, and the like. The tubing is available in either of two types, single strip or double strip as shown in Fig. 1.
FIG. 1 Brazed Tubing, Double-Wall, 360-deg Brazed Construction  
1.2 Units—This specification is expressed in both inch-pounds units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. In this specification hard or rationalized conversions apply to diameters, lengths, and tensile properties. Soft conversion applies to other SI measurements.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Aug-2019
• ICS: 23.040.15 - Non-ferrous metal pipes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.09 - Carbon Steel Tubular Products

Relations

• Refers: ASTM A370-15 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Nov-2015
• Refers: ASTM A370-17 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jan-2017
• Refers: ASTM A370-17a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-Nov-2017
• Refers: ASTM A370-19 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jul-2019

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: A254/A254M −12 (Reapproved 2019)
Standard Specification for
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Copper-Brazed Steel Tubing
This standard is issued under the fixed designationA254/A254M; 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 E30Test Methods for ChemicalAnalysis of Steel, Cast Iron,
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Open-Hearth Iron, and Wrought Iron (Withdrawn 1995)
1.1 This specification covers double-wall, copper-brazed
E59Practice for Sampling Steel and Iron for Determination
steel tubing suitable for general engineering uses, particularly
3
of Chemical Composition (Withdrawn 1996)
in the automotive, refrigeration, and stove industries for fuel
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2.2 Society of Automotive Engineers Standard:
lines, brake lines, oil lines, heating and cooling units, and the
J533Flares for Tubing
like. The tubing is available in either of two types, single strip
or double strip as shown in Fig. 1.
3. Ordering Information
1.2 Units—This specification is expressed in both inch-
3.1 Orders for material under this specification should
pounds units and in SI units; however, unless the purchase
include the following, as required to describe the desired
order or contract specifies the applicable M specification
material adequately:
designation (SI units), the inch-pound units shall apply. The
3.1.1 Quantity (feet, metres or number of pieces),
values stated in either inch-pound units or SI units are to be
3.1.2 Name of material (copper-brazed steel tubing),
regardedseparatelyasstandard.Withinthetext,theSIunitsare
3.1.3 Type,singlestripordoublestrip,wherenecessary(see
showninbrackets.Thevaluesstatedineachsystemmaynotbe
Fig. 1) (normally the type is not specified),
exact equivalents; therefore, each system shall be used inde-
3.1.4 Size (outside diameter and wall thickness; normally
pendentlyoftheother.Combiningvaluesfromthetwosystems
inside diameter should not be specified),
may result in non-conformance with the standard. In this
3.1.5 Length (specific or random),
specification hard or rationalized conversions apply to
3.1.6 Inside surface cleanliness where required (see Section
diameters, lengths, and tensile properties. Soft conversion
8),
applies to other SI measurements.
3.1.7 External coating, where required (see Section 7 and
1.3 This international standard was developed in accor-
Supplementary Requirement S2), and
dance with internationally recognized principles on standard-
3.1.8 Special or supplementary requirements or exceptions
ization established in the Decision on Principles for the
to specification.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Manufacture
Barriers to Trade (TBT) Committee.
4.1 The steel may be made by any commercially accepted
steelmaking process.
2. Referenced Documents
4.2 Ifaspecifictypeofmeltingisrequiredbythepurchaser,
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2.1 ASTM Standards:
it shall be as stated on the purchase order.
A370Test Methods and Definitions for Mechanical Testing
4.3 The primary melting may incorporate separate degas-
of Steel Products
sing or refining and may be followed by secondary melting,
A751Test Methods, Practices, and Terminology for Chemi-
such as electroslag remelting or vacuum-arc remelting. If
cal Analysis of Steel Products
secondary melting is employed, the heat shall be defined as all
of the ingots remelted from a single primary heat.
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This specification is under the jurisdiction ofASTM Committee A01 on Steel,
4.4 Steel may be cast in ingots or may be strand cast.When
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
steel of different grades is sequentially strand cast, identifica-
A01.09 on Carbon Steel Tubular Products.
tion of the resultant transition material is required. The
Current edition approved Sept. 1, 2019. Published September 2019. Originally
approved in 1944. Last previous edition approved in 2012 as A254/A254M–12.
DOI: 10.1520/A0254_A0254M-12R19.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or The last approved version of this historical standard is referenced on
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM www.astm.org.
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the ASTM website. PA 15096-0001, http://www.sae.org.
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