Active Standard ASTM A254 / A254M | Developed by Subcommittee: A01.09
Book of Standards Volume: 01.01
Historical (view previous versions of standard)
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.
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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.
1.2 UnitsóThis 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
E30 Test Methods for Chemical Analysis of Steel, Cast Iron, Open-Hearth Iron, and Wrought Iron
E59 Practice for Sampling Steel and Iron for Determination of Chemical Composition
Society of Automotive Engineers StandardJ533 Flares for Tubing
ICS Number Code 23.040.15 (Non-ferrous metal pipes)
UNSPSC Code 31351212(Copper welded or brazed tube assemblies)