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{"title":"Studded Tube , ASTM A213 T9 \/ ASME SA213 T11 with 11Cr (SS 409) Studded Fin Tube","imgUrl":"https:\/\/img.chinax.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.chinax.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.chinax.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.chinax.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.chinax.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.chinax.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"}}
Grade T9 is a low-alloy steel containing ~9% chromium and ~1% molybdenum, providing improved oxidation and corrosion resistance at elevated temperatures compared to carbon steel.
Conforms to ASTM A213, which covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes.
2. Studded Design
Studs (pins or projections) are resistance-welded to the tube's outer surface to improve heat transfer in gas-to-liquid or gas-to-steam applications.
Common stud materials include carbon steel, stainless steel, or alloy steel depending on service conditions.
3. Standards & Specifications
ASTM A213: Covers seamless tubes for high-temperature service.
ASME SA213: Equivalent ASME Boiler and Pressure Vessel Code version.
Stud welding standards: Typically follows AWS C1.1 for resistance welding.
4. Benefits of Studded Tubes
Enhanced heat transfer due to increased surface area.
Reduced fouling & improved gas flow in flue gas applications.
Better durability in high-temperature corrosive environments.
5. Manufacturing & Testing
Seamless tube fabrication (mandrel-rolled or extruded).
Stud welding performed under controlled conditions.
Nondestructive testing (NDT) such as hydrostatic, ultrasonic, or eddy current testing.
Chemical & mechanical testing per ASTM A213 requirements.
ASTM A213 T9 Studded Tube Application
The ASTM A213 T9 studded tube is specifically designed for high-temperature, high-pressure environments where enhanced heat transfer and resistance to oxidation/corrosion are critical. Below are some key applications where this tube excels:
1. Waste Heat Recovery Boilers (WHRB)
Used in HRSGs (Heat Recovery Steam Generators) in power plants and refineries to recover heat from exhaust gases (e.g., gas turbine flue gas).
Why T9?
Resists sulfidation & oxidation in flue gas environments (up to ~1,100°F / 593°C).
Studs increase heat absorption efficiency from hot gases.
2. Coal-Fired & Biomass Boilers
Convection pass & economizer sections where flue gas temperatures are high (~800–1,200°F / 427–649°C).
Why Studded?
Prevents ash fouling by disrupting gas flow.
Improves heat pickup in low-temperature zones.
3. Fluidized Bed Boilers (CFB & BFB)
Used in circulating fluidized bed (CFB) and bubbling fluidized bed (BFB) boilers.
Why T9?
Resists erosion-corrosion from abrasive bed materials.
Molybdenum content helps with creep resistance under cyclic loads.
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...
