APH Tube Corten Steel Supplier

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APH Tube Corten Steel Supplier

An APH tube, or Air Pre Heater tube, is a crucial component used in air preheaters, which are heat exchangers in industrial applications like boilers, furnaces, and kilns. The primary purpose of an air preheater is to preheat the combustion air using the waste heat from flue gases exiting the boiler or furnace. This preheating of the combustion air helps in improving the overall thermal efficiency of the system, as it reduces the amount of usable heat lost in the flue gas.

Air Pre Heater Tubes are essential elements within air preheaters, and they are designed to efficiently transfer heat from the hot flue gases to the incoming cold air.

These tubes are typically manufactured using high-quality materials and advanced equipment to ensure their performance and longevity. They come in various shapes, sizes, and specifications to meet the specific requirements of different industrial applications.

The primary function of an Air Pre Heater (APH) is to harness the waste heat present in flue gases as they exit a boiler. A key component in this process is the Air Pre Heater Tube, which plays a vital role in ensuring that the APH system operates effectively.

These tubes must adhere to specific requirements, encompassing factors such as elongation, hardness, yield strength, and tensile strength. Meeting these criteria is essential to guarantee the performance and durability of the APH system.

APH Tubes are available with welded or seamless ends, in hot-rolled or cold-drawn shapes. The choice of APH ERW tubes depends on the boiler’s design, which is influenced by factors like fuel type, operating temperatures, pressures, and steam volume requirements.

Air Pre Heater ERW Tubes find extensive use in a variety of industries, including power plants and process industries such as chemicals, sugar, power generation, steel manufacturing, cooling towers, superheaters, paper production, and air heating systems. Their reliability and efficiency are vital in these applications.

Ensuring that our products not only meet but exceed industry standards for quality is our top priority. Our APH Tubes undergo rigorous testing, including third-party inspections, PMI testing, raw material analysis, intergranular corrosion tests, pitting resistance assessments, and mechanical tests like flaring and flattening. This commitment to quality ensures that our products are reliable and perform optimally.

Types of Air Preheaters:

  • Shell and Tube Type Single Pass Air Pre-Heaters: Efficiently pre-heat combustion air in a single pass, optimizing energy transfer.
  • Shell and Tube Type Dual-Pass Air Pre-Heaters: Enhance heat exchange by allowing air to make two passes, further improving energy efficiency.
  • Finned Tube Air Pre-Heaters: Employ the use of finned tubes to maximize heat transfer capabilities, making them ideal for applications with stringent efficiency requirements.

In the world of industrial heating and energy efficiency, Air Preheaters (APH) play a pivotal role in optimizing performance. Here’s how they work and why they are indispensable:

In APH units, typically designed with a shell and tube architecture, a remarkable transformation takes place. Flue gases, carrying valuable exhaust heat, come into indirect contact with incoming air, leading to efficient heat exchange.

Anatomy of an Air Preheater:

  • The core of an air preheater is a shell containing an array of tubes arranged in a square or triangular configuration. These tubes are expertly welded to a tube plate, ensuring a robust structure.
  • Depending on the application’s specific requirements and ease of maintenance, the arrangement can alternate between allowing flue gases and air to traverse either the shell side or tube side.

Maximizing Heating Surface Area:

  • At Thermodyne Boilers, we understand the importance of maximizing heating surface area without compromising space. Our finned tube air preheaters are meticulously designed to increase efficiency by optimizing heat transfer capabilities.

Custom-Built Solutions:

  • At Thermodyne Engineering Systems, we recognize that each project is unique. That’s why we offer custom air preheaters tailored to our customers’ precise specifications.

1 and 2 Pass Designs:

  • Our Air Preheaters come in both 1 and 2 pass designs, ensuring maximum heat extraction from flue gases. This flexibility is crucial in enhancing energy efficiency.

Versatile Fuel Compatibility:

  • We manufacture air pre-heaters designed to meet diverse fuel requirements, including wood, coal, husk, bagasse, petcoke, light oil, and heavy oil. This adaptability ensures our solutions align with your specific energy sources.

Benefits of Air Preheater Tubes:

  • Extract Maximum Waste Heat: A two-pass design allows us to harness the maximum waste heat from flue gases leaving the boiler, contributing to higher efficiency.
  • Improved Boiler Efficiency: By capturing waste heat from the expelled flue gases, boiler efficiency sees a remarkable boost, often ranging from 2% to 3%.
  • Fuel Warming: Air preheaters also warm the incoming fuel, further enhancing the boiler’s overall effectiveness.
  • Faster Payback: The advantages of enhanced efficiency often translate into quicker payback periods, making them a wise investment.

In conclusion, Air Preheaters are the unsung heroes of energy efficiency, transforming waste heat into valuable resources. With custom solutions and a commitment to optimization, Thermodyne Boilers stands as a reliable partner in the journey towards energy savings and environmental responsibility.

APH Tube Specification

Thickness 0-10mm
Length 5-15 m
Features High Quality
Finishing Polished

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 —–

Corten Steel APH Tubes Properties (Chemical & Mechanical)

Specification Type Grade Chemical Composition% Mechanical Properties Remarks Impect /Hardness
Yield Strength Tensile Strength % Elongatione
Min. Max. Min. Max..
C Mn. P S SI
Min. Max. Min. Max. Min. Max. Min. Max. PSI MPa PSI MPa PSI MPa PSI MPa
IS: 2416 Pt-IV ERW 310 0.08 0.25 0.35 1.4 0.05 0.05 0.35 152 304 402 (100-RM / 9.81) /C, C=2.20 , RM=Measured T.S
360 0.08 0.25 0.35 1.4 0.05 0.05 0.35 177 353 451
440 0.08 0.25 0.35 1.4 0.05 0.05 0.35 201 402 500
IS :11714 Pt-III ERW 0.06 0.18 0.27 0.63 0.048 0.058 72 HRB(Max.)
IS : 1914 Pt-IV ERW 320 0.08 0.25 0.35 1.4 0.05 0.05 0.35 176 320 480 (100-RM / 9.81) /C, C=2.20 , RM=Measured T.S
360 0.08 0.25 0.35 1.4 0.05 0.05 0.35 198 360 500
440 0.08 0.25 0.35 1.4 0.05 0.05 0.35 242 440 580
BS:3059 Pt-I ERW 320 0.16 0.3 0.7 0.04 0.04 0.35 195 320 480 25
BS:3059 Pt-II ERW 360 0.17 0.4 0.8 0.035 0.035 0.1 0.35 235 360 500 24
440 0.12 0.18 0.9 1.2 0.035 0.035 0.1 0.35 245 480 580 21
BS:6323 Pt-V ERW ERW-1 0.13 0.6 0.05 0.05 200 300 D/a< 20 D/a >20
ERW-2 0.16 0.7 0.05 0.05 250 340 10 20
ERW-3 0.2 0.9 0.05 0.05 0.35 300 400 8 15
7 12
ASTM-A-178 ERW A 0.06 0.18 0.27 0.63 0.035 0.035 26,000 180 47,000 325 35
C 0.35 0.8 0.035 0.035 37,000 255 60,000 415 30
ASTM-A-214 ERW 0.18 0.27 0.63 0.035 0.035 72 HRB(Max.)
ASTM A333 & A334 ERW 1 0.3 0.4 1.06 0.025 0.025 30,000 205 55,000 380 35 18 J ,
85 HRB (Max.)
6 0.3 0.29 1.06 0.025 0.025 0.1 35,000 240 60,000 415 30 18 J ,
90 HRB (Max.)

Air Preheater Tubes stock range

40 0.9621.1671.3511.4241.5421.7411.9012.1732.4322.6952.9463.2803.599   
41.28 0.9931.2051.3961.4721.5941.7991.9652.2472.5162.7893.0483.3963.727   
44.45 1.0721.3011.5071.5891.7211.9442.1242.4302.7223.0193.3023.6824.0444.564  
49  1.4381.6661.7571.9042.1512.3512.6933.0183.3503.6674.0924.500   
50.8 1.2281.4921.7291.8241.9772.2332.4422.7973.1363.4813.8113.2554.6805.2926.144 
57.15    2.0592.2322.5232.7593.1633.5493.9434.3204.8285.3166.0207.006 
60.3     2.3582.6672.9173.3453.7544.1724.5735.1125.631   
63.5    2.2942.4872.8133.0773.5293.9624.4054.8295.4015.9516.7497.8678.508
65     2.5472.8813.1523.6164.0604.5144.9495.5376.102   
69.85    2.5282.7423.1023.3953.8963.3764.8675.3385.9746.5877.4778.7289.448
76.2    2.7632.9983.3923.7134.2624.7895.3295.8476.5487.2238.2059.59010.387
81.2    2.9483.1993.6203.9634.5515.1155.6936.2486.9997.7248.77810.26811.127
82.5    2.9963.2513.6804.0294.6265.1995.7876.3527.1167.8548.92810.44411.320
88.9    3.2233.5083.9724.3494.9955.6166.2536.8657.6948.4959.66111.31212.267
101.3     4.0194.5514.9855.7286.4437.1777.8838.8409.76611.11813.03514.146
114.3     4.5295.1305.6216.4617.2708.1018.9019.98611.03812.57414.75716.025

Grades of ERW Air PreHeater 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)


  • Chemical Industry
  • Sugar Industry
  • Power Industry
  • Power Generation
  • Electronic Industry
  • Steel Industry
  • Cooling Tower
  • Super Heater
  • Paper Industry
  • Air Heaters
  • Heat Exchanger

Supply and Exporter of APH Tubes in Cities like

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Supply and Exporter of APH Tube in Countries like

Taiwan, Mexico, Iran, Namibia, Afghanistan, Netherlands, Nepal, Ireland, Libya, Morocco, Iran, Switzerland, Finland, Slovakia, Pakistan, Australia, Serbia, Angola, China, Philippines, Czech Republic, Belgium, Estonia, Costa Rica, Croatia, Sweden, Venezuela, Colombia, India, Belarus, Jordan, Azerbaijan, Mongolia, Vietnam, Ghana, Iraq, Algeria, Puerto Rico, New Zealand, Singapore, Indonesia, Ukraine, Israel, Mexico, Hong Kong, Bhutan, Germany, Brazil, Plan, Yemen, Malasiya, USA, Cambodia, Laos, Uganda, Tanzania, Sudan, Democratic Republic of Congo, zambia, Ethiopia, Brunei, Madagascar, Niger, Mali, Bangladesh, Bolivia, United States, Ecuador, Lebanon, Italy, South Korea, Denmark, Norway, Sri Lanka, Zimbabwe, Japan, Yemen, Oman, Portugal, Lithuania, Canada, Macau, Bahrain, Austria, Bulgaria, Spain, Kenya, United Kingdom, United Arab Emirates, Kazakhstan, Egypt, Saudi Arabia, Gambia, Argentina, Romania, Tibet, France, Chile, Gabon, South Africa, Trinidad & Tobago,Tunisia, Turkey, Nigeria, Peru, Russia, Chile, Nigeria, Hungary, Qatar, Greece, Malaysia, Kuwait, Poland, Thailand, Poland.

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