Corten Steel APH Tube Supplier
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APH Preheater Tubes, Air Heater Tubes, Corten Steel ERW APH Tubes Supplier, APH ERW Tubes, AIR PREHEATER BOILER TUBES, Heat Exchanger Tube
What is Corten Steel APH Tubes?
Corten steel, known for its weathering properties, forms a protective patina on its surface that enhances its resistance to corrosion. Corten steel APH (Air Preheater) tubes are specifically designed for use in industrial settings where high durability is required. These tubes are utilized in air preheating systems, where they preheat the air entering furnaces for fuel combustion.
APH tubes made from Corten steel are particularly valuable in applications involving high temperatures and corrosive environments. They help to improve the efficiency of combustion by preheating the air, thus optimizing fuel use. Additionally, Corten steel APH tubes assist in extracting waste gases from flue systems, playing a crucial role in managing emissions from boilers.
The use of Corten steel in APH tubes ensures that they withstand harsh operating conditions, including exposure to high temperatures and corrosive substances. This makes them suitable for industrial applications where longevity and reliability are critical.
Overall, Corten steel APH tubes offer a robust solution for air preheating and flue gas management, combining the benefits of weather-resistant steel with the specific needs of industrial processes.
Corten Steel APH Tube Specification
| Length | 5 – 15m |
|---|---|
| Thickness | 1 – 10mm |
| Finish | Polished |
| Specification | ASTM A423 |
| ASTM A519 Tubing Tolerance | Cold drawn pipe: +/-0.1mm
Cold rolled pipe: +/-0.05mm |
| Shape | Round |
| Application | in boilers to heat the air before using it |
Chemical Properties of Corten Steel Air Preheaters Tube
| Si % max. |
C % max. |
Mn % | Z% | S % max. |
P % | N % max. |
Cr % | V% | Cu % | Ni% | Mo% | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| According to EN 10027-1 & CR 10260 | ||||||||||||
| S235J2W | 0.40 | 0.13 | 0.20-0.60 | – | 0.03 | 0.04 | – | 0.40-0.80 | – | 0.25-0.55 | 0.65 | – |
| S235J0W | 0.40 | 0.13 | 0.20-0.60 | – | 0.04 | 0.04 | 0.01 | 0.40-0.80 | – | 0.25-0.55 | 0.65 | – |
| S355J2WP | 0.75 | 0.12 | 1.00 | – | 0.03 | 0.06-0.15 | – | 0.30-1.25 | – | 0.25-0.55 | 0.65 | – |
| S355J0W | 0.75 | 0.12 | 1.00 | – | 0.04 | 0.06-0.15 | 0.01 | 0.30-1.25 | – | 0.25-0.55 | 0.65 | – |
| S355J2W | 0.50 | 0.16 | 0.50-1.50 | 0.15 | 0.03 | 0.03 | – | 0.40-0.80 | – | 0.25-0.55 | 0.65 | 0.30 |
| S355J0W | 0.50 | 0.16 | 0.50-1.50 | 0.15 | 0.04 | 0.04 | 0.01 | 0.40-0.80 | – | 0.25-0.55 | 0.65 | 0.30 |
| S355K2W | 0.50 | 0.16 | 0.50-1.50 | 0.15 | 0.03 | 0.03 | – | 0.40-0.80 | – | 0.25-0.55 | 0.65 | 0.30 |
| According to ASTM & ASME Specn. | ||||||||||||
| A 588 Gr. B | 0.15- 0.50 |
0.20 | 0.75-1.35 | 0.05 | 0.04 | – | 0.40-0.70 | 0.01- 0.10 |
0.20-0.40 | |||
| A 588 Gr. A | 0.3- 0.65 |
0.19 | 0.80-1.25 | 0.05 | 0.04 | – | 0.40-0.65 | 0.02- 0.10 |
0.25-0.40 | |||
| A 588 Gr. C | 0.15- 0.40 |
0.15 | 0.80-1.35 | 0.05 | 0.04 | – | 0.30-0.50 | 0.01- 0.10 |
0.20-0.50 | |||
| A 242 Type-1 | – | 0.15 | 1.00 | 0.05 | 0.15 | 0.20 min. | ||||||
| A 588 Gr. K | 0.25- 0.50 |
0.17 | 0.50-1.20 | Cb-0.005 -0.05 |
0.05 | 0.04 | – | 0.40-0.70 | – | 0.30-0.50 | ||
| A 242 Type-2 | – | 0.20 | 1.50 | 0.05 | 0.04 | 0.20 min. | ||||||
| According to IS STD. | ||||||||||||
| IRSM-41 | 0.30- 0.50 |
0.10 | 0.25-0.45 | – | 0.03 | 0.075-0.14 | – | 0.35-0.49 | 0.05 | 0.30-0.60 | 0.28- 0.49 |
0.05 |
Boiler APH Tube Mechanical Properties
| Metric | Imperial | |
|---|---|---|
| Ultimate Tensile Strength | 483 MPa | 70,000psi |
| Density | 7.75 g/cc | 0.28 lb/in3 |
| Yield Tensile Strength | 345 MPa | 50,000psi |
Air Preheater Tubes Trade Name
| Trade Name | Grade | UNS # | Heater Tubes(Seamless) | Heater Tubes( Heater / Condenser ) (without Filler Metal) | Heater Tubes( General Service ) (Seamless/Welded) |
| 304 | TP304 | S30400 | A213 / SA213 | A249 / SA249 | A269 |
| 304L | TP304L | S30403 | A213 / SA213 | A249 / SA249 | A269 |
| 304H | TP304H | S30409 | A213 / SA213 | A249 / SA249 | —– |
| 316 | TP316 | S31600 | A213 / SA213 | A249 / SA249 | A269 |
| 316L | TP316L | S31603 | A213 / SA213 | A249 / SA249 | A269 |
| 316H | TP316H | S31609 | A213 / SA213 | A249 / SA249 | —– |
| 321 | TP321 | S32100 | A213 / SA213 | A249 / SA249 | A269 |
| 321H | TP321H | S32109 | A213 / SA213 | A249 / SA249 | —– |
| 347 | TP347 | S34700 | A213 / SA213 | A249 / SA249 | A269 |
| 347H | TP347H | S34709 | A213 / SA213 | A249 / SA249 | —– |
| 317L | TP317L | S31703 | A213 / SA213 | A249 / SA249 | —– |
APH Tube Material Equivalent
| Material # | ASTM | SEW 087 | EN 10155 | UNI | NFA 35-502 | BS 4360 | JIS G3114 |
|---|---|---|---|---|---|---|---|
| 1.8967 | – | – | S355K2G2W | – | – | – | – |
| 1.8945 | – | E 36 WA 3 | S355J0WP | WR 50 A | Fe 510 C1K1 | – | – |
| 1.8961 | – | WTSt 37-3 | S235J2W | Fe 360 DK 1 | E 24 W 4 | – | – |
| 1.8959 | A 588 – A 242 Gr. 1 | – | S355J0W | Fe 510 C2K1 | E 36 WB 3 | WR 50 B | SMA 50 AW |
| 1.8946 | A 242 Type 1 | – | S355J2WP | Fe 510 D1K1 | E 36 WA 4 | – | – |
| 1.8965 | – | – | S355J2G2W | – | – | – | SMA 50 CP |
| 1.8963 | A 588 Gr. A | WTSt 52-3 | S355J2G1W | Fe 510 D2K1 | – | WR 50 C | to |
| 1.8966 | A 709 Gr. 50 W | – | S355K2G1W | – | E 36 WB 4 | – | – |
Dimension chart of Corten Steel APH Tube
| Od/THK | 1 | 6 | 0.9 | 1.22 | 1.5 | 1.42 | 1.85 | 1.63 | 2.03 | 2.64 | 2.34 | 3.25 | 2.95 | 3.66 | 4.65 | 4.06 | 5.5 |
| 19.05 | 0.445 | 0.403 | 0.536 | 0.649 | 0.617 | 0.785 | 0.700 | 0.852 | 0.964 | ||||||||
| 15.88 | 0.367 | 0.332 | 0.441 | 0.532 | 0.506 | 0.573 | |||||||||||
| 22.2 | 0.523 | 0.473 | 0.631 | 0.766 | 0.728 | 0.928 | 0.827 | 1.010 | 1.145 | ||||||||
| 25.4 | 0.602 | 0.544 | 0.728 | 0.884 | 0.842 | 1.074 | 0.956 | 1.250 | 1.585 | 1.244 | 1.749 | ||||||
| 23.42 | 0.553 | 0.500 | 0.668 | 0.811 | 0.770 | 0.984 | 0.876 | 1.095 | 1.482 | 1.216 | 1.633 | ||||||
| 28.58 | 0.680 | 0.614 | 0.823 | 1.002 | 0.951 | 1.220 | 1.083 | 1.329 | 1.689 | 1.422 | 1.865 | ||||||
| 33.7 | 0.806 | 0.728 | 0.977 | 1.191 | 1.130 | 1.453 | 1.289 | 1.585 | 2.022 | 1.810 | 2.441 | 2.237 | 2.711 | ||||
| 31.75 | 0.758 | 0.685 | 0.919 | 1.119 | 1.062 | 1.364 | 1.211 | 1.488 | 1.895 | 1.697 | 2.284 | 2.095 | |||||
| 34.93 | 0.837 | 0.756 | 1.015 | 1.237 | 1.174 | 1.510 | 1.339 | 1.648 | 2.104 | 1.882 | 2.541 | 2.328 | 2.824 | ||||
| 40 | 0.962 | 1.167 | 1.424 | 1.351 | 1.741 | 1.542 | 1.901 | 2.432 | 2.173 | 2.946 | 2.695 | 3.280 | 3.599 | ||||
| 38.1 | 0.915 | 0.826 | 1.110 | 1.354 | 1.285 | 1.654 | 1.466 | 1.806 | 2.309 | 2.064 | 2.793 | 2.557 | 3.109 | 3.408 | |||
| 41.28 | 0.993 | 1.205 | 1.472 | 1.396 | 1.799 | 1.594 | 1.965 | 2.516 | 2.247 | 3.048 | 2.789 | 3.396 | 3.727 | ||||
| 49 | 1.438 | 1.757 | 1.666 | 2.151 | 1.904 | 2.351 | 3.018 | 2.693 | 3.667 | 3.350 | 4.092 | 4.500 | |||||
| 44.45 | 1.072 | 1.301 | 1.589 | 1.507 | 1.944 | 1.721 | 2.124 | 2.722 | 2.430 | 3.302 | 3.019 | 3.682 | 4.564 | 4.044 | |||
| 50.8 | 1.228 | 1.492 | 1.824 | 1.729 | 2.233 | 1.977 | 2.442 | 3.136 | 2.797 | 3.811 | 3.481 | 3.255 | 5.292 | 4.680 | 6.144 | ||
| 60.3 | 2.667 | 2.358 | 2.917 | 3.754 | 3.345 | 4.573 | 4.172 | 5.112 | 5.631 | ||||||||
| 63.5 | 8.508 | 2.294 | 2.813 | 2.487 | 3.077 | 3.962 | 3.529 | 4.829 | 4.405 | 5.401 | 6.749 | 5.951 | 7.867 | ||||
| 57.15 | 2.059 | 2.523 | 2.232 | 2.759 | 3.549 | 3.163 | 4.320 | 3.943 | 4.828 | 6.020 | 5.316 | 7.006 | |||||
| 65 | 2.881 | 2.547 | 3.152 | 4.060 | 3.616 | 4.949 | 4.514 | 5.537 | 6.102 | ||||||||
| 69.85 | 9.448 | 2.528 | 3.102 | 2.742 | 3.395 | 3.376 | 3.896 | 5.338 | 4.867 | 5.974 | 7.477 | 6.587 | 8.728 | ||||
| 81.2 | 11.127 | 2.948 | 3.620 | 3.199 | 3.963 | 5.115 | 4.551 | 6.248 | 5.693 | 6.999 | 8.778 | 7.724 | 10.268 | ||||
| 76.2 | 10.387 | 2.763 | 3.392 | 2.998 | 3.713 | 4.789 | 4.262 | 5.847 | 5.329 | 6.548 | 8.205 | 7.223 | 9.590 | ||||
| 82.5 | 11.320 | 2.996 | 3.680 | 3.251 | 4.029 | 5.199 | 4.626 | 6.352 | 5.787 | 7.116 | 8.928 | 7.854 | 10.444 | ||||
| 101.3 | 14.146 | 4.551 | 4.019 | 4.985 | 6.443 | 5.728 | 7.883 | 7.177 | 8.840 | 11.118 | 9.766 | 13.035 | |||||
| 88.9 | 12.267 | 3.223 | 3.972 | 3.508 | 4.349 | 5.616 | 4.995 | 6.865 | 6.253 | 7.694 | 9.661 | 8.495 | 11.312 | ||||
| 114.3 | 16.025 | 5.130 | 4.529 | 5.621 | 7.270 | 6.461 | 8.901 | 8.101 | 9.986 | 12.574 | 11.038 | 14.757 |
APH in Boiler Applications
- Chemical Industry
- Sugar Industry
- Power Industry
- Power Generation
- Electronic Industry
- Steel Industry
- Cooling Tower
- Super Heater
- Paper Industry
- Air Heaters
- Heat Exchanger
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FAQs
Air Preheaters (APH) are Shell and Tube Heat Exchangers designed to heat air before it enters boilers or furnaces. They extract heat from flue gas exiting the boiler, improving efficiency and fuel economy by pre-warming the incoming air.
APH tubes in boilers are typically available in sizes with an outer diameter ranging from 19.05 mm to 114.3 mm and a wall thickness between 0.71 mm and 6.0 mm. These tubes undergo straightening and 100% Eddy current testing to ensure quality. They are used in various applications, including MS ERW boiler tubes, heat exchangers, superheaters, and air pre-heaters.
The full form of APH in a boiler is Air Pre-Heater. It is used to preheat the combustion air before it enters the furnace or boiler, thereby improving efficiency and reducing flue gas temperature.
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