Alloy Steel Stud Tube Manufacturer
Alloy steel stud finned tube is one of the preferred materials for steel-welded studded tubes used in petrochemical tubular heaters, highly valued for its high-temperature resistance, high-pressure strength, and superior corrosion resistance, which significantly enhance the thermal efficiency and service life of heat exchange equipment.
Datang’s alloy studded tubes guarantee zero leakage in base tubes and high-strength bonds for every individual stud. We offer fully customized solutions—tailoring base tube specifications, stud shapes, and dimensions to precisely match your specific operating conditions.
Alloy Steel Studded Pipe Key Material Grades Comparison
| ASTM Grade | Nominal Composition | Operating Temp. Range | Primary Applications |
| P11 | 1.25 Cr – 0.5 Mo | Up to 550 C° (1022 F°) | Low-alloy steam piping, convection sections, superheaters |
| P22 | 2.25 Cr – 1 Mo | Up to 580 C° (1076 F°) | High-temperature refinery heaters, cracking furnaces |
| P5 | 5 Cr – 0.5 Mo | Up to 650 C° (1202 F°) | Hydrogen-rich processing units, sulfur-containing environments |
| P9 | 9 Cr – 1 Mo | Up to 650 C° (1202 F°) | Cokers, vacuum distillation, severe corrosive media |
| P91 | 9 Cr – 1 Mo – V – Nb | Up to 650 C°+ (1202 F°) | Ultra-supercritical boilers, high-pressure steam headers |
Datang strictly complies with the relevant technical standards for steel welded stud tubes used in petrochemical tubular furnaces for the quality control of alloy steel stud tubes. The process involves comprehensive raw material inspections for both base tubes and studs (heads), as well as rigorous evaluations of welding processes and weld quality during production.
Post-welding requirements include strict heat treatment and hardness testing, along with pressure and leak testing on finished products. Furthermore, tensile tests, flattening tests, flaring tests, and metallographic examinations are performed to ensure the load-bearing capacity, sealing performance, and heat treatment efficacy of the stud tubes.
Studded Pipe / Finned Tube
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Alloy Steel PipeCommonly used materials for alloy steel tubes include A335 P1/P5/P9/P11, A213 T9/T11/T22, and 15CrMoG.
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Stud HeadStud Materials:Carbon steel (such as ASTM A510 1005–1010) or stainless steel (such as AISI 304, 316, 321, 347, etc.) is typically used.
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Plastic Pipe Cap for Steel PipeThe primary purpose is to protect the tube/pipe ends from dust, moisture, and impact damage during manufacturing, transportation, storage, and installation, as well as to safeguard the threads or bevels.
State-of-the-art Production Equipment
The production of stud tubes primarily relies on highly automated resistance-welded stud tube production lines. Utilizing dual-head synchronous resistance/arc welding technology, a single line can achieve a daily output of 50,000 to 100,000 studs (approximately 150 to 300 meters of finished tubing). The welding process features highly concentrated energy and a minimal heat-affected zone (HAZ), enabling 100% full-cross-section metallurgical bonding between the studs and the base tube. With joint strength exceeding that of the parent material, it ensures exceptional heat transfer performance and structural reliability under high-temperature and high-pressure conditions. This not only guarantees the quality of the stud tubes but also meets tight delivery schedules for clients.
Customizable Alloy Steel Studded Pipe
We can customize the material, specification and length according to your requirements.Solve your problems anytime and anywhere. Customize welded studded tubes and equipment according to your needs. Provide free technical guidance. Welcome to customize with drawings, so that you can purchase without worries.
Stud Finned Tube Package
To ensure safety during long-distance ocean freight, our exported stud tubes utilize a high-standard export-grade packaging solution: each tube end is fitted with a dedicated plastic protective cap on the inside to safeguard precision bevels, while the exterior is securely strapped using moisture-proof paper and high-strength steel bands. The outer packaging can be equipped with either sturdy fumigation-free wooden cases or customized wooden crates, providing comprehensive protection against collisions and moisture while fully complying with international phytosanitary standards. Additionally, clear and standardized waterproof shipping marks are printed on the exterior, ensuring a seamless and worry-free receiving experience for our global clients.
High Frequency Welded Spiral Fin Tube Quality Checks
Each of our stud finned tube is subjected to stringent quality checks.Inspection and Tests Performed:
1.Chemical Composition inspection。
2.Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test).
3.Surface and Dimension Test.
4.No-destructive Test.
5.Hydrostatic Test.
Studded Pipes Application
Stud head specifications range from φ12 to 25 mm in diameter and 25 to 38 mm in height, with a minimum spacing of 16 mm. The material selection for studded fin tubes follows the same principles as for finned tubes.
When the fuel contains a high ash content, studded tubes are preferred because they are easier to clean due to accumulated ash.
Studded Tubes enhance heat transfer through the flue gas, withstand temperatures of 400-600°C, and are suitable for dusty flue gas environments.
Studded tubes made of corrosion-resistant materials are used for heat exchange in acidic and alkaline media. The density of the studs is adjusted according to the severity of the corrosiveness.
Studded fin tubes improve the heat utilization rate of low-temperature flue gas. Marine power systems utilize their vibration resistance to adapt to turbulent environments.
Related Product
Studded Pin Pipes FAQs
A: Stud finned tube production line 3.
A: We can provide stud finned tube samples for free.
A: After you confirm welded studded tube sample details, the samples will be ready for delivery in 3-7days,and will be sent to you via express and arrive in 3-5days.
A: Studded tube can be customized, we can make the new thermoforming or extruding mode based on your drawings and we can sign a confidentiality agreement about your patented product, pls contact us for any further information.
A: Always a pre-production sample,before mass production;always final inspection before shipment.
Inspection & Guarantee Certificate is supplied with shipment, and the Third Party Inspection is available.