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{"title":"ASME SA213 T22 Serrated Fin With Tube For Heat Exchanger And Air Cooler","imgUrl":"https:\/\/img.ismap.com\/nimg\/72\/88\/db67cf176ce75cc0a29742f45a8f-200x200-1\/asme_sa213_t22_serrated_fin_with_tube_for_heat_exchanger_and_air_cooler.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"ASME SA213","Certification":"ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008","Place of Origin":"China"}}
{"title":"Studded Tube , ASTM A213 T9 \/ ASME SA213 T11 with 11Cr (SS 409) Studded Fin Tube","imgUrl":"https:\/\/img.ismap.com\/nimg\/00\/5e\/193bf5e1420e2ad6d787493b5761-200x200-1\/studded_tube_2c_astm_a213_t9_2f_asme_sa213_t11_with_11cr_28ss_409_29_studded_fin_tube_2csteam_reforming_furnace.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"Studded Fin Tube , Pin Tube, Oil Furnace Tube , Steam Furnace Tube, Reforming Tube","Certification":"ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008","Place of Origin":"China, Korea"}}
{"title":"ASTM A179 Carbon Steel Seamless Tube with Aluminum ASTM B221 6063 (1060),","imgUrl":"https:\/\/img.ismap.com\/nimg\/7b\/14\/2f89f1fc083fb0d86fc1c8c6a7b5-200x200-1\/astm_a179_carbon_steel_seamless_tube_with_aluminum_astm_b221_6063_281060_29_2c_extruded_fin_tube.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"Extruded Fin Tube","Certification":"ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008","Place of Origin":"China, Korea"}}
{"title":"ASME SA210 Gr.A1 Seamless Tube with Aluminum Al1060 Embedded G type Fin tube","imgUrl":"https:\/\/img.ismap.com\/nimg\/42\/83\/722d4f6a846d5b7ec435ca0956f1-200x200-1\/asme_sa210_gr_a1_seamless_tube_with_aluminum_al1060_embedded_g_type_fin_tube.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"A179, A192, SA210 Gr A1\/C, A106 Gr B, TP304\/304L,TP316\/TP316L\/316Ti, A789 S31803\/S2205 Copper:UNS12200\/UNS14200\/UNS70600, CuNi70\/30,CuNi 90\/10","Certification":"ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008","Place of Origin":"China"}}
{"title":"Welded Helical Serrated Fin Tubes HFW Fin Tube For Per Heating Application","imgUrl":"https:\/\/img.ismap.com\/nimg\/e9\/39\/0f0159470fee4c18f8581ab23fed-200x200-1\/welded_helical_serrated_fin_tubes_hfw_fin_tube_for_per_heating_application.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"HFW fin Tube , Serrated Fin Tube","Certification":"ISO , PED, API , CE","Place of Origin":"CHINA"}}
{"title":"ASME SA179 , ASTM A179 Carbon Steel Low Finned Tube, for Air Cooler, cooling","imgUrl":"https:\/\/img.ismap.com\/nimg\/e1\/4f\/b53764af2b239d868febd1d5d10a-200x200-1\/asme_sa179_2c_astm_a179_carbon_steel_low_finned_tube_2c_for_air_cooler_2c_cooling_tower_application.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"Low Fin Tube, Low Finned Tube","Certification":"ABS, GL, DNV, NK, PED, AD2000, CCS, ISO 9001-2008","Place of Origin":"CHINA"}}
{"title":"ASTM A179\/ ASME SA179 Carbon Steel Seamless Tube with Aluminum 1060\uff0c Air Cooler,","imgUrl":"https:\/\/img.ismap.com\/nimg\/38\/23\/670b6953aaff63cf0fbfa25b3c77-200x200-1\/astm_a179_2f_asme_sa179_carbon_steel_seamless_tube_with_aluminum_1060_ef_bc_8c_air_cooler_2c_extruded_fin_tube_2cembedded_g_fin_tu.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"A179 , A192, A210 Gr.A1, C , ASTM A213 T11, T22, T5, T9","Certification":"ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008","Place of Origin":"China"}}
Core Tube Material - SA312 T22 (Clarification & Correction):
SA312: This ASME specification covers seamless and welded austenitic stainless steel pipes intended for high-temperature and general corrosive service.
T22: This is NOT a grade typically listed under SA312. SA312 grades are like TP304, TP316, TP321, etc. (stainless steels).
"T22" Confusion: T22 refers to a low-alloy steel (2.25% Chromium - 1% Molybdenum). It is a very common material for high-temperature service, but falls under specifications like:
ASME SA213 T22: For seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes.
ASME SA335 P22: For seamless ferritic alloy-steel pipe for high-temperature service.
Conclusion: The core tube material is almost certainly SA213 T22 (if it's a tube) or SA335 P22 (if it's a pipe). It's a low-alloy steel known for good high-temperature strength, creep resistance, and oxidation resistance up to about 1050°F (565°C). It is not stainless steel.
Fin Type - Serrated Fins:
Structure: Serrated fins start as a continuous helical fin (like an "L" or "LL" footed fin) wound onto the base tube. At regular intervals along the height of the fin, small sections are cut out or "notched" perpendicular to the fin's length.
Key Visual Feature: Instead of being a smooth, continuous strip, the fin has a series of small, regular gaps or indentations along its edge, creating a "serrated" appearance (like a saw blade).
Purpose of Serrations:
Enhanced Heat Transfer: The serrations disrupt the boundary layer formation of the fluid (usually gas like air or flue gas) flowing over the fins. This creates turbulence, breaking up the laminar sub-layer and significantly improving heat transfer efficiency compared to plain fins.
Reduced Weight & Material: The removed material slightly reduces the overall weight and cost compared to an equivalent solid fin.
Trade-offs:
Slightly Higher Pressure Drop: The increased turbulence also increases the resistance to fluid flow (pressure drop) across the tube bundle.
Potential for Fouling: The notches can sometimes be more prone to trapping particulates in dirty gas streams compared to plain fins, though less so than studded fins.
Combined Description - SA213 T22 Tube with Serrated Fins:
Core: A seamless tube manufactured to ASME SA213 T22 specifications, made of 2.25Cr-1Mo low-alloy steel.
Fin: A helical fin mechanically bonded (usually tension-wound and footed) to the outer surface of the tube. This fin features regular notches cut perpendicularly along its height, creating the serrated edge profile.
SA213 T22 Serrated Fin Tube Application:
Power Plants Heat Recovery Steam Generators (HRSGs): Economizers, Evaporators, Superheaters, Reheaters, Maximizes heat capture from exhaust gas. Air Heaters (Ljungström/Rothemühle), Coal/Gas-Fired Boilers Economizer sections (preheating feedwater)
Petrochemicals/Refineries: Process Heaters/Furnaces, Thermal Oxidizers/Incinerators Waste heat boilers
Industrial Boilers Waste Heat Boilers Recovering heat from kilns, gas turbines, or chemical processes
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
