Domestic WeiZhan vortex flowmeter undergoes technological iteration and upgrades, offering tailored measurement solutions for large-diameter flue gas and coal gas under complex operating conditions.

In the metallurgical and coal‑chemical industries, flow measurement for large‑diameter blast furnace gas and coke oven gas pipelines commonly faces challenges such as high costs associated with shutdowns and maintenance, frequent instrument clogging, long‑term metering inaccuracies, and substantial energy consumption due to pipeline pressure drops. The Weizhan Vortex Flowmeter, independently developed by Tangshan Fengrun District Zhanwang Automation Equipment Co., Ltd., features an optimized design tailored to address the measurement needs of large‑diameter gas streams and is now in stable operation at numerous enterprises.

Figure 1: Complete unit of the Weizhanba flowmeter

Core Product Advantages

1. The anti‑clogging structure has been optimized to accommodate dusty, contaminated gases. The probe features an aerodynamic, bullet‑shaped design, with low‑pressure tapping ports positioned at the upstream edge of the flow’s vortex region. Continuous media flushing at the tapping ports helps mitigate the accumulation and blockage caused by tar and particulates. For long‑term operation with converter gas, coke oven raw gas, and high‑temperature flue gases, this design can reduce the frequency of manual purging and maintenance.

Figure 2 Schematic diagram of the probe’s fluidic principle

2. The Weizhan BA flowmeter features a seamless, one-piece molded structure, eliminating multi‑piece assembly to reduce the likelihood of cavity leakage. This ensures long‑term measurement stability, enabling reliable energy consumption monitoring and accurate energy recovery metering. Leveraging proprietary technology, it can assess the impact of scale buildup on pipe walls, mitigating data deviations caused by media adhesion and changes in flow path that plague conventional flowmeters. It also provides auxiliary correction for measurement data, guaranteeing precise flow measurement and stable operation even under complex and harsh gas‑process conditions.

3. Large-diameter products enable pressurized installation without shutting down production. Designed for pipelines with diameters ranging from DN100 to DN6000, they allow equipment installation via on-site pressurized tapping, eliminating the need to shut down and purge flammable or toxic gas lines. This minimizes production losses associated with downtime. Additionally, the system exhibits low pressure drop, helping to reduce the energy consumption of associated fans, and incorporates buffer‑type modifications. Compared with imported equipment of the same specifications, it offers a notable cost‑effectiveness advantage.

·Application Scenarios

1. DN2500 converter flue gas pipeline

Operating conditions: 250°C high‑temperature flue gas under negative pressure; the pipeline system is so large that shutdown and retrofit are not feasible. Onsite results: Pressurized, in‑service installation was carried out, ensuring stable measurement of the recovered converter off‑gas flow rate, assisting operators in monitoring network pressure fluctuations, and mitigating risks associated with abnormal flow or pressure.

Figure 3: On-site installation of the DN2500 flue gas pipeline—Scene 1 Figure 4: On-site installation of the DN2500 flue gas pipeline—Scene 2

2. DN1600 gas main pipe

Operating conditions: low-pressure coal gas at 40°C, pipe diameter DN1600, metering accuracy class 1.5; it can replace the original instruments that are prone to blockage, exhibits a low probability of clogging under continuous operation, and delivers stable metering data, thereby providing reliable data support for coal‑gas recovery and production cost accounting within the plant.

Figure 5: On-site installation of a DN1600 gas pipeline, view 1 Figure 6: On-site installation of a DN1600 gas pipeline, view 2

DN150 nitrogen pipeline

Operating conditions: The DN150 nitrogen pipeline of the raw-materials workshop’s purging system operates at a working pressure of 1.6 MPa, with a standard‑state temperature of 20°C and a process‑medium temperature of 40°C; the throttling element is made of 316 stainless steel. The flowmeter has a measurement range of 100 to 6,000 Nm³/h, significantly enhancing the stability and data consistency of nitrogen‑flow measurements under purging‑system operating conditions.

Figure 7: On-site view of DN150 nitrogen pipeline, No. 1

Figure 8: On-site view of DN150 nitrogen pipeline, No. 2

Tangshan Fengrun District Zhanwang Automation Equipment Co., Ltd. boasts a comprehensive R&D, manufacturing, and installation service system. Its flagship brand, Weizhan Bar Flow Meters, specializes in large‑diameter gas and complex‑condition fluid measurement, serving a wide range of industries including steel, coking, and chemical processing. Our company offers end‑to‑end services—on‑site condition assessment, customized solutions, on‑site installation, technical guidance, and after‑sales maintenance—and can tailor exclusive metering solutions to suit varying pipe diameters, temperatures, pressures, and medium characteristics.

Looking ahead, Automation will continue to deepen its presence in the industrial large‑diameter metering market, aligning closely with the dual‑carbon strategy of peaking carbon emissions and achieving carbon neutrality. By offering domestically produced instruments that deliver high cost‑effectiveness, robust stability, and minimal maintenance requirements, it will serve as a viable domestic alternative to imported metering equipment. This will provide precise and reliable metrological support for energy consumption monitoring and carbon‑footprint accounting in the heavy‑industry sector, helping enterprises achieve energy savings, reduced resource consumption, safe production, and refined management upgrades, while also driving low‑carbon transformation and smart‑manufacturing advancement across the heavy‑industry value chain.

Note: The product performance and application results presented in this document are based on field measurements conducted under specific customer‑site operating conditions. Due to variations in pipeline media, temperature, pressure, and on‑site installation constraints, actual performance may differ across different applications. The information provided herein is intended solely as a reference for product selection and does not constitute a warranty of product performance.