ASTM A335 P22 Alloy Steel Solid Fin Tube for Air Cooled Heat Exchanger

Air cooled heat exchangers (ACHE) and fin fan coolers are essential for heat rejection in refineries, petrochemical plants, and power stations. Our ASTM A335 P22 solid fin tube is specifically engineered for high-temperature, high-pressure air cooler service where standard carbon steel fin tubes would fail. Manufactured from seamless A335 P22 chromium-molybdenum alloy steel (2.25Cr-1Mo) with integrally welded solid helical fins, this fin tube delivers exceptional heat transfer efficiency and structural integrity at metal temperatures up to 580°C. It offers outstanding resistance to creep, oxidation, and hydrogen attack, making it the preferred choice for hydrotreating, hydrocracking, and catalytic reforming air cooler bundles. Every tube is produced and tested in strict compliance with API 661 and ASME standards, ensuring reliable long-term performance, reduced maintenance, and lower lifecycle costs in the most demanding refinery and petrochemical service.

ASTM A335 P22 (2.25Cr-1Mo) offers superior creep resistance, oxidation resistance, and resistance to hydrogen attack at elevated temperatures. This material is the standard choice for air cooler bundles in hydrotreating, hydrocracking, catalytic reforming, and atmospheric/vacuum distillation units, operating reliably at metal temperatures up to 580°C.

• Zero contact resistance: Fins are integrally welded to the base tube using high frequency welding, eliminating the air gap found in serrated or wrapped fin designs
• Vibration resistance: Solid fin-to-tube bond withstands continuous fan-induced vibration without fin loosening or detachment
• High temperature integrity: Welded joint maintains full strength at elevated operating temperatures
• Erosion and corrosion resistance: Suitable for harsh refinery atmospheres and dusty environments
• Extended service life: Reduced maintenance and replacement frequency compared to mechanical fin tubes

Base tubes are manufactured from seamless A335 P22 pipe with fins applied by high frequency resistance welding (HFW), ensuring a homogeneous metallurgical bond with consistent fin pitch, height, and thickness. Each tube undergoes hydrostatic testing and dimensional inspection before shipment.

• Refinery air cooled heat exchangers and fin fan coolers
• Hydrotreating and hydrocracking unit air coolers
• Catalytic reforming and delayed coking unit coolers
• Petrochemical process air coolers
• Power plant air cooled condensers and dry cooling systems
• Compressor intercoolers and aftercoolers

YUHONG HOLDING GROUP CO., LTD is an ISO 9001:2015 certified manufacturer and exporter with over 30 years of special steel experience. Every fin tube batch includes mill test certificates, chemical composition analysis, and mechanical property reports.

Contact our engineering team for custom fin geometries, material combinations, and bundle design support. We provide complete documentation for international projects.