ASTM A213 T9 studded tubes, also referred to as studded fin tubes, are high-performance heat transfer components designed for demanding waste heat recovery applications. Manufactured from ASTM A213 T9 seamless alloy steel tubing, these tubes are equipped with uniformly welded steel studs on the outer surface to significantly increase the effective heat transfer area while maintaining excellent mechanical strength under elevated temperatures.

The addition of welded studs promotes turbulence in the gas stream, improves heat exchange efficiency, and minimizes fouling compared with plain tubes. These characteristics make ASTM A213 T9 studded tubes an excellent solution for waste heat boilers operating in high-temperature, high-pressure, and corrosive industrial environments.

Our studded tubes are manufactured using automated resistance welding equipment to ensure consistent stud spacing, strong weld integrity, in addition to reliable long-term performance. Every production batch is subjected to rigorous inspection procedures to meet customer specifications and applicable international standards.

Features

Manufactured from ASTM A213 T9 seamless alloy steel tubes
Excellent high-temperature strength and creep resistance
Increased external heat transfer surface through welded studs
Improved gas-side heat transfer efficiency
Reduced fouling and easier cleaning compared with plain tubes
Uniform stud welding for reliable mechanical performance
Suitable for high-pressure and high-temperature service
Custom dimensions and stud configurations available

Typical Applications

ASTM A213 T9 studded tubes are widely used in heat recovery systems where enhanced heat transfer and long service life are required, including:

Waste Heat Boilers (WHB)
Sulfur Recovery Units (SRU)
Petrochemical processing plants
Oil refineries
Power generation plants
Steel and metallurgical industries
Cement production facilities
Chemical processing equipment
Heat recovery steam generators (HRSG)
Industrial exhaust gas heat exchangers

Dimension Range

Dimensions can be customized according to customer drawings and equipment design requirements.

Item	Specification Range
Tube Standard	ASTM A213
Base Tube Material	T9 (9Cr-1Mo Alloy Steel)
Tube Type	Seamless Tube
Outside Diameter	25.4 mm - 88.9 mm
Wall Thickness	2.5 mm - 12 mm
Tube Length	3000 mm - 18000 mm
Stud Diameter	8 mm - 20 mm
Stud Height	10 mm - 25 mm
Stud Pitch	Customized according to design requirements
Stud Material	Carbon Steel, Alloy Steel, Stainless Steel Available
Manufacturing Standard	ASTM / ASME / EN Available

Chemical Composition of ASTM A213 T9

Element	Requirement (%)
Carbon (C)	≤0.15
Manganese (Mn)	0.30-0.60
Phosphorus (P)	≤0.025
Sulfur (S)	≤0.025
Silicon (Si)	0.25-1.00
Chromium (Cr)	8.00-10.00
Molybdenum (Mo)	0.90-1.10
Iron (Fe)	Balance

Mechanical Properties

Item	Requirement
Tensile Strength	≥415 MPa
Yield Strength	≥205 MPa
Elongation	≥30%

Ratings & Review

Overall Rating

4.7

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

67%

4 stars

33%

3 stars

2 stars

1 stars

All Reviews

Kenneth Tan

Singapore Feb 25.2026

Helpful (3)

With our humidity and year-round high temps, corrosion resistance and heat transfer are always a concern. These tubes have been performing nicely.

Pieter

South Africa Dec 17.2025

Helpful (4)

With high firebox temps and some sour gas in the mix, regular carbon tubes don't last. These have been solid.

Rashid

United Arab Emirates Dec 10.2025

Helpful (2)

Good oxidation resistance, matches well with the T9. No scaling or thinning noticed.

Tags:

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube