Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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API661 Air Fan Cooled Dosh, Mol, TRCU For Russia, CRN For Canada
An air cooler comprises four fundamental elements:
Tube Bundles: The core heat transfer unit, consisting of finned tubes arranged in rows. These tubes are fabricated from materials like carbon steel, stainless steel, or duplex alloys (e.g., SA213-TP304, SA789-S31803). Fins (often aluminum) are mechanically bonded to the tubes (e.g., extruded, "L" wrap-on) to amplify the heat exchange surface area by 10–24 times, compensating for air’s low thermal conductivity.
Axial Fans: High-efficiency fans drive airflow across the tube bundles. They are categorized into forced draft (fans below the bundle) or induced draft (fans above the bundle), with the latter preventing hot air recirculation and enhancing thermal performance.
Structural Framework: A steel or alloy framework supports the tube bundles and fans, ensuring stability under operational stresses and environmental conditions (e.g., wind, vibration).
Headers and Louvers: Headers distribute fluid evenly into the tubes, while adjustable louvers regulate airflow to optimize cooling efficiency and adapt to seasonal temperature variations.
Applicable Codes & Standards
| Category | Standard/Certification | Description/Scope | Applicable Region/Country |
| ASME | U-Stamp with NB Certificate | Certification for pressure vessels and heat exchangers meeting ASME Boiler & Pressure Vessel Code. | Global (ASME-compliant regions) |
| API 661 | API 661 | Design, manufacturing, and testing requirements for air-cooler heat exchangers. | Global (Oil & Gas Industry) |
| Korea | KGS | Korean Gas Safety standards for pressure equipment. | South Korea |
| KOSHA | Korean Occupational Safety and Health Agency regulations. | South Korea | |
| KEMCO | Korea Energy Management Corporation energy efficiency requirements. | South Korea | |
| KESCO | Korea Environmental Storage Container standards. | South Korea | |
| Tec. | Technical compliance for specific industrial equipment. | South Korea | |
| Japan | KHK | High-Pressure Gas Safety Law (Japanese regulations for pressure vessels). | Japan |
| 2nd Class Pressure Vessel | Certification for medium-pressure vessels under Japanese law. | Japan | |
| CE Mark | PED Certification | Compliance with EU Pressure Equipment Directive (2014/68/EU). | European Union |
| UKCA | PESR 2016 | UK Pressure Equipment Safety Regulations post-Brexit. | United Kingdom |
| EN 1090-1 | Standards for structural steel and aluminum components. | United Kingdom/EU | |
| Worldwide Local Laws | DOSH | Department of Occupational Safety and Health (Malaysia). | Malaysia |
| MOL | Ministry of Labour (Taiwan) regulations for industrial safety. | Taiwan | |
| TRCU | Technical Regulations of the Customs Union (Russia/Eurasian Economic Union). | Russia/Eurasian Economic Union | |
| CRN | Canadian Registration Number for pressure equipment. | Canada |
Material Combinations
| Component | Material/Type | Details |
| Tube | SA179, SA214 | Seamless cold-drawn low-carbon steel tubes for heat exchangers. |
| SA213-TP304/304L/316/316L, 321 | Austenitic stainless steel tubes for high-temperature/pressure resistance. | |
| SA249-TP304/304L/316/316L, 321 | Welded stainless steel tubes for boilers and heat exchangers. | |
| SA789-S31803 | Duplex stainless steel tubes for corrosion resistance. | |
| Fin | AL (Aluminum) | Lightweight, high thermal conductivity fin material. |
| Fin Type | Extruded | Fins mechanically bonded to tubes via extrusion process. |
| "G" Embedded | Fins embedded in a helical groove on the tube surface. | |
| Knurled "L" | Fins with knurled surface for enhanced adhesion. | |
| "L" Wrap-on | Fins wrapped onto tubes in an "L" shape for secure attachment. | |
| Double "L" | Dual-layer "L" wrap-on fins for increased structural stability. |
