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ASTM A179 Heat Exchanger Tubes
ASTM A179/A179M, ASME SA179/SA179M is the standard applicable to Seamless cold drawn low carbon steel heat exchanger and condenser tubes.
Seamless cold drawn low carbon steel heat exchanger and condenser tubes.
Application: apply to the heat exchangers, condensers and heat transfer equipment and similar pipe.
Production Standard, Grade, Steel No: ASTM A179/ASME SA179
GB6479 10, 20, 16Mn, 15MnV, 12CrMo, 15 CrMo, 12Cr2Mo, 12SiMoVNb
Delivery conditions: Annealed, Normalized, Normalized and Tempered
Mill test certificates will be issued according to EN10204 3
Size (mm):
Outer dimensions. 6.0mm – 114.0mm
Wall Thickness: 1mm – 15 mm
Length: max 12000mm
Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test, No-destructive Test, Hydrostatic Test.
Surface treatment:
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles.
Grade and Chemical Composition (%)
| Chemical Composition | C | Mn | P≤ | S≤ | Si≤ |
| 0.06-0.18 | 0.27-0.63 | 0.035 | 0.035 | 0.25 |
U-Bend Fabrication Tolerances:
| Item | Condition (when) | Tolercance |
|---|---|---|
| Nominal bend radius ≤ 2 x nominal OD | less than or equal to 12% | |
| Ovality | 2 x nominal OD < Nominal bend radius ≤ 4 x nominal OD | less than or equal to 10% |
| Nominal bend radius > 4 x nominal OD | less than or equal to 5% | |
| Nominal bend radius ≤ 2 x nominal OD | 0.75 x nominal wall | |
| Mimimum wall thickness | 2 x nominal OD < Nominal bend radius ≤ 4 x nominal OD | 0.8 x nominal wall |
| Nominal bend radius > 4 x nominal OD | 0.9 x nominal wall | |
| Nominal bend radius ≤ 8" (200mm) | +/-3/64"(1mm) | |
| Bending Radius | 8" (200mm) < Nominal bend radius ≤ 16" (400mm) | +/-1/16"(1mm) |
| Nominal bend radius >16" (400mm) | +/-5/64"(1mm) | |
| Disrance between legs | Max 1/16"(1.5mm) | |
| Wall thinning of bending area | Max 17% | |
| Difference between leg lengths at the ends | Leg length ≤ 16' (4.88m) | +1/8"(3mm) |
| Leg length > 16' (4.88m) | +3/16"(5mm) | |
| Deviation from plane of bend | ≤ 3/16"(1.5mm) | |
| Flattening on bend | ≤ 10% nominal diameter | |
| Straight leg length | ≤5m | +1/8"(3mm) |
| >5m | +3/16(5mm) | |
| Total tube length including radius | ≤6m | +3/16(5mm) |
| >6m | +5/16"(8mm) |
Wall thickness & Tolerance
Outside Diamter, mm |
Tolerance, % |
3.2≤OD＜38.1 |
+20/-0 |
38.1≤OD≤76.2 |
+22/-0 |
Description:
1. Standards: ASTM A179 (ASME SA179)
2. Products mainly used: apply to the heat exchangers, condensers and heat transfer equipment and similar pipe.
3. The main products of steel / steel grade: A 179
4. Specifications: diameter: 10.3 to 76.2 mm thickness: 1.2 to 12 mm Length: 6 m above, and, according to customer requirements, The supply of steel and other specifications of the pipe.
5. Chemical composition and mechanical properties
Cold drawn seamless carbon steel tube for heat exchanger and condenser
