ASTM A179 Carbon Steel Heat Exchanger Tubes for Boiler
| Standard | ASTM A179, ASTM A192 |
| Material | Carbon Steel |
| Size | WT: 1-15mm; OD: 6-168mm; Length: max 32000mm |
| Applications | For Boilers,Superheaters, Heat-Exchangers, High-pressure Boilers, Steam Boilers Cold Condensers and High-Pressure Services, High-Temperature Services for Boiler Constructions |
| Manufacture | Tubes are manufactured by seamless process and both hot finished and cold finished are applicable. |
| Heat treatment | Hot finished tubes need not be heat treated. Cold Finished tubes are heat treated after the final cold finishing pass at a temperature of 1200℉(650℃) or higher |
| Test | Tension Test, Flaring Test, Flange Test, Reverse Test, Hardness Test, Hydrostatic or Nondestructive Electric Test etc |
Chemical Composition
| C | Mn | P | S | Si |
| 0.06-0.18 | 0.27-0.63 | ≤0.035 | ≤0.035 | ≤0.25 |
Mechanical Properties
| Tensile Streghth, min ksi [Mpa] | Yield Point, min ksi [Mpa] | Elongation, % |
| 47[325] | 26[180] | ≥35% |
Hardness
| Brinell Hardness | Rockwell Hardness Number |
| WT≥0.200in(5.1mm) | WT<0.200in(5.1mm) |
| 137HRB | 77HRB |
Tolerance for OD and WT(SA-450/SA-450M)
| OD in(mm) | + | - | WT in(mm) | + | - |
| <1''(25.4) | 0.10 | 0.10 | ≤1.1/2''(38.1) | 20% | 0 |
| 1''~1.1''(25.4~38.1) | 0.15 | 0.15 | >1.1/2''(38.2) | 22% | 0 |
| >1.1/2''~<2''(38.1~50.8 | 0.20 | 0.20 | | | |
| 2''~<2.1/2''(50.8~63.5) | 0.25 | 0.25 | | | |
| 2.1/2''~<3''(63.5~76.2) | 0.30 | 0.30 | | | |
| 3''~<4''(76.2~101.6) | 0.38 | 0.38 | | | |
| 4''~<7.1/2''(101.6~190.5) | 0.38 | 0.64 | | | |
| >7.1/2~9''(190.5~228.6) | 0.38 | 1.14 | | |
ASTM A450/A 450M Sepcification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes
ASTM A520 Specification for Supplementary Requirements for Seamless and Electric-Resistance-Welded Carbon Steel Tubular Products for High-Temperature Service Conforming to ISO Recommendations for Boiler Construction.
QUALITY CONTROL:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
PACKING:
Each tube in a plastic bag, then put tubes in a seaworthy woven bag ,each unit weight 400kg-500kg/bundle.
With strong wood structure box packing by containers loading and shipping.
Or as customer's requirement.
20 ft container - GP: 5.8m (Length) * 2.13m (Width) * 2.18m (Height) ------ Max Gross Weight: 25MT/container.
40 ft container - GP: 11.8m (Length) * 2.13m (Width) * 2.18m (Height) ------ Max Gross Weight: 27MT/container.
40 ft container - HG: 11.8m (Length) * 2.13m (Width) * 2.72m (Height) ------ Max Gross Weight: 27MT/container.
Port Shanghai
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples of carbon seamless steel tube ? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
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