ASTM A179: Seamless cold-drawn mild steel tubing;
Suitable for tubular heat exchangers, condensers, and similar heat transfer equipment.
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Diameter Range
ASTM A179 for tubes with outside diameters between 3.2 -76.2 mm [NPS 1/8 - 3 in.].
Heat Treatment
Heat treated at 1200℉ [650℃] or above after final cold suction passage.
Appearance
The finished steel pipe shall not have scale. Slight oxidation is not considered a scale.
Dimensional Tolerances
| Dimensional Tolerances | ||
| List | Sort | Scope |
| Mass | DN≤38.1mm[NPS 11/2] | +12% |
| DN＞38.1mm[NPS 11/2] | +13% | |
| Diameter | DN≤38.1mm[NPS 11/2] | +20% |
| DN＞38.1mm[NPS 11/2] | +22% | |
| Lengths | DN＜50.8mm[NPS 2] | +5mm[NPS 3/16] |
| DN≥50.8mm[NPS 2] | +3mm[NPS 1/8] | |
| Straightness and Finish | Finished tubes shall be reasonably straight and have smooth ends free of burrs. | |
| Defect handling | Any discontinuity or irregularity found in the tube may be removed by grinding, provided that a smooth curved surface is maintained, and the wall thickness is not decreased to less than that permitted by this or the product specification. | |
ASTM A179 weight formula is:
M=(D-T)×T×C
M is the mass per unit length;
D is the specified outside diameter, expressed in millimeters (inches);
T is the specified wall thickness, expressed in millimeters (inches);
C is 0.0246615 for calculations in SI units and 10.69 for calculations in USC units.
If you want to know more about steel pipe weight tables and schedules, click here!
ASTM A179 Test
Chemical Components
Test Method: ASTM A450 Part 6.
| Chemical Components | |
| C (Carbon) | 0.06-0.18 |
| Mn (Manganese) | 0.27-0.63 |
| P (Phosphorus) | ≤0.035 |
| S (Sulfur) | ≤0.035 |
It is not permissible to supply alloy grades that explicitly call for the addition of any element other than those listed above.
Tensile Properties
Test Method: ASTM A450 Part 7.
| Tensile Requirements | ||
| List | classification | value |
| Tensile strength, min | KSI | 47 |
| MPa | 325 | |
| Yield strength, min | psi | 26 |
| MPa | 180 | |
| Elongation in 50mm (2 in ), min |
% | 35 |
Flattening Test
Test method: ASTM A450 Part 19.
Flaring Test
Test method: ASTM A450 Part 21.
Expanded Trivia: The flaring test is a test used to evaluate the plastic deformability and crack resistance of metallic materials, especially tubes when subjected to flaring processes. This test is commonly used to evaluate the quality and suitability of tubes, especially in applications where welding, flaring or other forms of processing are required.
Flange Test
Test Method: ASTM A450 Part 22. Alternative to Flare Test.
Expanded Trivia: Typically refers to an experiment used to evaluate the plastic deformability and crack resistance of sheet metal, pipe, or other materials during simulated flanged joints.
Hardness Test
Test Method: ASTM A450 Part 23. Hardness shall not exceed 72 HRBW.
HRBW: Specifically refers to Rockwell B Scale hardness tests performed on welded areas.
Hydraulic Pressure Test
Test method: ASTM A450 Part 24.
Non-destructive Electrical Test
Test method: ASTM A450, Part 26. Alternative to the hydraulic test.
ASTM A179 Marking
ASTM A179 shall be clearly marked with the manufacturer's name or brand name, specification number, grade, and purchaser's name and order number.
The marking need not include the year date of this specification.
For tubes less than 31.8 mm [1 1/4 in. ] in diameter and tubes under 1 m [3 ft] in length, the required information may be marked on a tag securely attached to the bundle or box in which the tubes are shipped.
ASTM A179 Relevant Standards
EN 10216-1
Application: Unalloyed steel pipes for pressure purposes with specified room temperature properties.
Main application: Widely used for pressure piping in the petroleum and chemical industries.
DIN 17175
Application: Seamless steel tubes for use at high temperatures.
Main applications: Boiler industry, heat exchangers.
BS 3059 Part 1
Application: Seamless and welded steel tubes for use at low temperatures.
Main applications: heat exchangers, condensers.
JIS G3461
Application: Carbon steel boiler and heat exchanger tubes.
Main applications: heat exchanger and boiler tubes.
ASME SA 179
Application: Almost identical to ASTM A179 for seamless cold-drawn mild steel heat exchanger and condenser tubes.
Primary application: Surface heat exchangers, condensers, etc.
ASTM A106
Application: Seamless carbon steel tubing for high-temperature service.
Main application: Pressure pipes for petroleum and chemical industries at high temperatures.
GB 6479
Application: High-pressure seamless steel pipe for chemical equipment and piping.
Main Application: High-pressure pipeline for the chemical industry.
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Post time: Mar-27-2024