ASTM A213 T22 (K21590) Alloy Steel Seamless Cold Drawn Studded Fin Tube

ASTM A213 T22(K21590) Seamless Studded Fin Tube

1.Product Overview

ASTM A213 T22 (corresponding to European EN standard 1.7380) is a chromium-molybdenum low-alloy heat-resistant steel. The Studded Fin Tube is a high-efficiency heat transfer component made by welding stud-like fins on the surface of seamless cold-drawn T22 tubes. Its defining characteristics are the Cr-Mo element composition (providing excellent high-temperature strength, oxidation resistance and creep resistance) and the studded fin structure (greatly increasing the external heat transfer area). It fills the demand for high-efficiency heat exchange in high-temperature and high-pressure harsh conditions, and is a core component in energy and petrochemical heat transfer equipment.

ASTM A213 T22 Studded Fin Tube is a high-temperature-resistant, efficiency-enhanced tubular product, specifically designed for high-heat-flux heat exchange scenarios, commonly used in superheaters, reheaters and waste heat recovery equipment.

2.Chemical Composition(%)

3.Mechanical Properties

4. Equivalent Material of T22

5.T22 Studded Fin Tube vs. Similar Products

T22 vs. T11 Studded Fin Tube: T11 is a low Cr-Mo steel (Cr~1.25%, Mo~0.5%), while T22 has higher Cr/Mo content—its high-temperature strength and creep resistance are better, suitable for working conditions up to 593℃; T11 is more cost-effective, applicable to lower-temperature heat exchange scenarios.

T22 vs. TP304 Studded Fin Tube: T22 fin tubes have far superior high-temperature strength (especially above 500℃) than TP304 stainless steel fin tubes, but weaker corrosion resistance; it is suitable for high-temperature oxidative fluid heat exchange, while TP304 is for medium-temperature corrosive media.

6. Applications of ASTM A213 T22 Studded Fin Tube

1.Power industry: Studded fin tubes for superheaters/reheaters of power plant boilers (adapting to steam temperatures ≤593℃);

2.Petrochemical industry: Heat exchanger tubes for cracking furnaces and hydrocrackers (coping with high-temperature process fluid heat transfer);

3.Waste heat recovery system: Core tubes of high-temperature exhaust gas waste heat recovery devices (enhancing heat utilization via studded fins);

4.Industrial boiler: Reinforced heat transfer components of high-temperature flue gas heat exchangers (improving flue gas-working medium heat exchange efficiency).