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

Craft	Cold rolled and Cold drawn
Standards	ASTM, ASME and API
Length	Min 3 Meters, Max18 Meters, or according to customer’s requirement
Thickness	3-12mm
Schedules	SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules
Type	Seamless / ERW / Welded / Fabricated
Tolerance	Cold drawn pipe: +/-0.1mm Cold rolled pipe: +/-0.05mm
Additional Testing	NACE MR0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.
Form	Round, Hydraulic Etc
Origin	European, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material)
End	Plain End, Beveled End, Treaded
Specialized in	Large Diameter ASTM A192 Pipe
Size	1/2” NB to 36” NB

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)

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.)

Corten Steel APH Tubes Properties (Mechanical)

Od/THK	0.9	1	1.22	1.42	1.5	1.63	1.85	2.03	2.34	2.64	2.95	3.25	3.66	4.06	4.65	5.5	6
15.88	0.332	0.367	0.441	0.506	0.532	0.573
19.05	0.403	0.445	0.536	0.617	0.649	0.700	0.785	0.852	0.964
22.2	0.473	0.523	0.631	0.728	0.766	0.827	0.928	1.010	1.145
23.42	0.500	0.553	0.668	0.770	0.811	0.876	0.984	1.095	1.216	1.482	1.633
25.4	0.544	0.602	0.728	0.842	0.884	0.956	1.074	1.250	1.244	1.585	1.749
28.58	0.614	0.680	0.823	0.951	1.002	1.083	1.220	1.329	1.422	1.689	1.865
31.75	0.685	0.758	0.919	1.062	1.119	1.211	1.364	1.488	1.697	1.895	2.095	2.284
33.7	0.728	0.806	0.977	1.130	1.191	1.289	1.453	1.585	1.810	2.022	2.237	2.441	2.711
34.93	0.756	0.837	1.015	1.174	1.237	1.339	1.510	1.648	1.882	2.104	2.328	2.541	2.824
38.1	0.826	0.915	1.110	1.285	1.354	1.466	1.654	1.806	2.064	2.309	2.557	2.793	3.109	3.408
40		0.962	1.167	1.351	1.424	1.542	1.741	1.901	2.173	2.432	2.695	2.946	3.280	3.599
41.28		0.993	1.205	1.396	1.472	1.594	1.799	1.965	2.247	2.516	2.789	3.048	3.396	3.727
44.45		1.072	1.301	1.507	1.589	1.721	1.944	2.124	2.430	2.722	3.019	3.302	3.682	4.044	4.564
49			1.438	1.666	1.757	1.904	2.151	2.351	2.693	3.018	3.350	3.667	4.092	4.500
50.8		1.228	1.492	1.729	1.824	1.977	2.233	2.442	2.797	3.136	3.481	3.811	3.255	4.680	5.292	6.144
57.15					2.059	2.232	2.523	2.759	3.163	3.549	3.943	4.320	4.828	5.316	6.020	7.006
60.3						2.358	2.667	2.917	3.345	3.754	4.172	4.573	5.112	5.631
63.5					2.294	2.487	2.813	3.077	3.529	3.962	4.405	4.829	5.401	5.951	6.749	7.867	8.508
65						2.547	2.881	3.152	3.616	4.060	4.514	4.949	5.537	6.102
69.85					2.528	2.742	3.102	3.395	3.896	3.376	4.867	5.338	5.974	6.587	7.477	8.728	9.448
76.2					2.763	2.998	3.392	3.713	4.262	4.789	5.329	5.847	6.548	7.223	8.205	9.590	10.387
81.2					2.948	3.199	3.620	3.963	4.551	5.115	5.693	6.248	6.999	7.724	8.778	10.268	11.127
82.5					2.996	3.251	3.680	4.029	4.626	5.199	5.787	6.352	7.116	7.854	8.928	10.444	11.320
88.9					3.223	3.508	3.972	4.349	4.995	5.616	6.253	6.865	7.694	8.495	9.661	11.312	12.267
101.3						4.019	4.551	4.985	5.728	6.443	7.177	7.883	8.840	9.766	11.118	13.035	14.146
114.3						4.529	5.130	5.621	6.461	7.270	8.101	8.901	9.986	11.038	12.574	14.757	16.025

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)

Applications

• 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

Pimpri-Chinchwad, Chandigarh, Kuwait City, Ulsan, Ankara, Geoje-si, Hanoi, Noida, Secunderabad, Sharjah, Los Angeles, Ahmedabad, Caracas, Al Khobar, Mexico City, Jaipur, New York, Tehran, Gimhae-si, Muscat, Jakarta, Montreal, Perth, Chiyoda, Madrid, Pune, Baroda, Nagpur, Ludhiana, Surat, Melbourne, Lagos, Bengaluru, Kuala Lumpur, Algiers, Ernakulam, Haryana, Courbevoie, London, Dammam, Brisbane, Thane, Aberdeen, Hong Kong, Doha, Houston, Ahvaz, Bogota, Bangalore, Cochin, Anand, Nadiad, ankleshwar, Bharuch, vapi, Valsad, Medak, Godavari, Mumbai, Dallas, Santiago, Bangkok, New Delhi, Ranchi, Hyderabad, Lahore, Indore, Jeddah, Singapore, Kanpur, Moscow, Coimbatore, Seoul, Navi Mumbai, Granada, Chennai, Sydney, Istanbul, Colombo, Faridabad, Dubai, Howrah, Toronto, Rajkot, Karachi, Milan, Bhopal, Nashik, Cairo, Riyadh, Edmonton, Rio de Janeiro, Kolkata, La Victoria, Vung Tau, Gurgaon, Ho Chi Minh City, Thiruvananthapuram, Visakhapatnam, Petaling Jaya, Atyrau, Vadodara, Jamshedpur, Abu Dhabi, Al Jubail, Manama, Busan, Calgary, Port-of-Spain.

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.