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Accesen Work has been resumed on February 11th
02 Mar 2020
The NB/T 11748-2024 "Plate Air Cooler" industry standard, co-drafted by Shanghai Accessen, has been officially released. Approved by the National Energy Administration and administered by the Heat Exchanger Subcommittee of the China Standardization Committee for Boilers and Pressure Vessels, this inaugural standard will take effect on June 25, 2025. It establishes comprehensive specifications for the entire lifecycle of plate air cooler manufacturing and inspection, marking a critical milestone for industry standardization.
As a high-efficiency heat exchange device for steam/water and gas/gas applications, plate air coolers integrate features of plate heat exchangers and air-cooled exchangers. They transfer heat through direct/indirect air-to-fluid contact, excelling in high-temperature and heat recovery applications. Utilizing fully-welded plate bundles as thermal transfer units, these systems offer compact design, superior heat transfer efficiency, and low pressure drop—delivering critical performance in heat recovery from flue gases across refining, chemical, power, and metallurgical industries.
Rising market demand and expanding applications necessitate unified industry standards. Led by the Heat Exchanger Subcommittee, the standard was developed with participation from China Special Equipment Inspection Institute, Sinopec, Xi'an Jiaotong University, Chengda Engineering, PetroChina, and Harbin Air Conditioning. Leveraging over two decades of expertise in plate air preheater R&D and manufacturing, Shanghai Accessen contributed pivotal technical insights to the drafting process. As a veteran participant in national standard formulation, Accessen provided critical technical validation through its portfolio: plate heat exchangers, A-BLOC four-side accessible welded exchangers, and AWK fully-welded air heat exchangers.
The NB/T 11748-2024 standard specifies: Design pressure limit: ≤4.0 MPa, Temperature range: Material-dependent. It governs the entire equipment lifecycle through rigorous requirements for:
l Material Selection: Performance metrics for metallic/non-metallic materials
l Design: Thermal and mechanical design methodologies
l Manufacturing: Welding procedures and plate bundle assembly protocols
l Inspection & Acceptance: NDT, pressure testing, leak testing, operational validation
l Performance Evaluation: Energy efficiency metrics and noise assessment methodologies
The standard further provides fault diagnosis guidelines and corrective measures to ensure long-term operational reliability.
Sinopec Yangzi Petrochemical DeNOx Project for Reformers
Zhejiang Xinna Materials Waste Heat Recovery from Hot Air Dryers
Shandong Soybean Protein Production Waste Heat Recovery
Accessen's contribution to this standard provides definitive technical guidance for industry advancement. Its plate air preheaters have delivered significant economic and environmental benefits in over 20 projects, including:
l DeNOx systems for CO converters at Sinopec Yangzi Aromatic Plant
l Silica flash dryer waste heat recovery at Zhejiang Xinna
l Natural gas heater heat recovery in Shandong soybean protein production
These implementations empower clients to achieve cost reduction, efficiency gains, and emission cuts in clean energy transitions.
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ACCESSEN is a heat exchange solution provider specializing in the research, development, manufacture, sales, and service of heat exchange equipment. With an annual capacity of over 30,000 sets, is one of the largest heat exchanger manufacturers. Specialize in the HVAC, Refrigeration, Power, Metallurgy, Chemical, Food, Electronics, Marine and Environmental protection markets, your on-demand heat transfer solutions provider.
