APH (Air Pre-heater) Tube
Corten Steel Tube is a trusted manufacturer, exporter, and supplier of Air Pre Heater (APH) Tubes, fabricated using premium-grade raw materials from certified vendors. Our advanced manufacturing process ensures that these tubes meet both national and international quality standards. Available in various sizes, types, dimensions, and thicknesses, we also offer customized specifications tailored to meet your project needs at competitive prices.
Function of Air Pre Heaters:
APH (Air Pre-heater) Tubes are essential components in shell and tube heat exchangers known as air preheaters. These tubes are designed to preheat the air that is fed into boilers, furnaces, or kilns, improving the efficiency of fuel combustion. The primary function of an air preheater is to recover waste heat from the flue gases leaving the boiler, helping to enhance the overall thermal efficiency by reducing heat loss.
Types of Air Preheaters Tube
- Shell and Tube Type Single Pass Air Preheaters
- Shell and Tube Type Dual-Pass Air Preheaters
- Finned Tube Air Preheaters
APH Tube Materials
Air preheater (APH) tubes are commonly made from the following materials:
- Corten Steel: A low-alloy, high-strength weathering steel that includes anti-corrosion elements like copper and nickel, making it resistant to dew point corrosion and more durable than carbon steel in harsh conditions.
- Mild Steel: Used material for APH tubes, known for its versatility and strength.
- Carbon Steel: Used for its strength and durability in high-temperature applications.
- Stainless Steel: Chosen for its excellent corrosion resistance, especially in environments requiring long-lasting performance.
Quality Assurance
At Corten Steel Tube, we prioritize product quality through rigorous testing to ensure our APH Tubes meet or exceed industry standards. Testing includes:
- PMI (Positive Material Identification)
- Raw Material Testing
- Intergranular Corrosion Tests
- Pitting Resistance Tests
- Flaring/Flattening Tests
- Third-Party Inspections
We are also proud to be a Corten Steel ERW APH Tubes Dealer and Stockist of TATA Steel.
Looking for high-quality Air Pre Heater Tubes? Get a quote today for your specific requirements, including sizes, grades, and customized specifications.
Air Pre Heater Tubes Specification
| Thickness | 0-10mm |
|---|---|
| Length | 5-15 m |
| Material |  CORTEN STEEL |
| Features |  High Quality |
| Finishing | Polished |
Types of Air Preheaters Tube
Air Preheaters Tube
Cor-ten Steel APH Tube
Boiler APH Tube Material
Grades of ERW APH Tubes
- BS: 3059 (Pt-I & II)
- BS: 6323 (Pt-V)
- ASTM: A-178 / A-214 / A-333 / A-334
- IS: 1914 (Pt-IV)
- IS: 2416 (Pt-IV)
- IS: 11714 (Pt-III)
Corten Steel APH Tube Chemical Properties
| 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 |
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 | – | – |
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 |
Sizes of Air Preheater Tubes
| Size (Nominal Diameter) | Typical Wall Thickness | Common Applications |
|---|---|---|
| 1/2 inch | 1.5 mm to 3 mm | Small-scale air preheaters |
| 1 inch | 2 mm to 4 mm | Medium-sized industrial applications |
| 1.5 inch | 2.5 mm to 4.5 mm | Larger air preheaters for industrial use |
| 2 inch | 3 mm to 5 mm | High-capacity preheaters |
| 2.5 inch | 3.5 mm to 5.5 mm | Heavy-duty air preheaters |
| 3 inch | 4 mm to 6 mm | Large industrial systems |
| 4 inch | 4.5 mm to 7 mm | High-volume air preheaters |
| 6 inch | 5 mm to 8 mm | Large-scale and high-pressure systems |
| 8 inch | 6 mm to 10 mm | Heavy industrial applications |
Function of Corten (Core 10) APH Tubes in Boilers
- Energy Efficiency: By preheating the combustion air, Corten APH tubes reduce the amount of energy required to raise the air temperature to the desired level, improving the overall efficiency of the boiler system.
- Reduced Emissions: Corten APH tubes help lower flue gas temperatures, which in turn reduces the emission of pollutants, contributing to cleaner energy production.
- Fuel Savings: The improved efficiency of the boiler, driven by the use of Corten APH tubes, results in significant cost savings by lowering fuel consumption.
APH Tubes Pros & Cons
APH Tubes Pros:
- Maximized Heat Recovery: APH tubes use a two-pass design to capture the maximum amount of waste heat from flue gases, significantly improving the boiler’s efficiency.
- Increased Boiler Efficiency: By utilizing waste heat to preheat the air, APH tubes can boost boiler efficiency by 2% to 3%, leading to better fuel utilization.
- Fuel Preheating: The preheated fuel helps the boiler perform more efficiently, further reducing energy consumption.
- Shorter Payback Time: The improved efficiency results in quicker returns on investment due to reduced fuel costs.
APH Tubes Cons:
- Flue Gas Pressure Drop: The addition of APH equipment can cause a reduction in flue gas pressure, potentially requiring a larger induced draught fan to compensate for the pressure drop.
APH Tubes Application Industries
- Petrochemical Industry
- Chemical Industry
- Oil and Gas Industry
- Pulp and Paper Industry
- Power Plants
- Food Processing Industry
- Pharmaceutical Industry
- Energy Sector
- Aerospace Industry
- Onshore and Offshore Services
- Sugar Industry
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United Arab Emirates (UAE), India, Singapore, Australia, United Kingdom (UK), Canada, South Africa, Ireland, Indonesia, Malaysia, Philippines, USA.
Contact Our Expert Team Today
At Corten Steel Tube, we specialize in providing high-quality Air Pre Heater (APH) Tubes to your specific needs. Our team is ready to assist you with product selection, customization, and any queries you may have to ensure a smooth experience from start to finish.