Instrumentation & Flowmeters

Electromagnetic flowmeters are sophisticated measurement instruments designed based on Faraday's law of electromagnetic induction. They are classified into split-type (capable of measuring conductive liquids, two-phase flows, and high-viscosity or corrosive fluids like acids and salts) and integrated-type (dedicated to conductive fluid volume measurement) models, with nominal diameters spanning from DN15 to DN3000.

Applications:Due to their unique measurement advantages, these devices are widely utilized across the chemical, papermaking, food, textile, metallurgical, environmental protection, and water supply and drainage industries. When integrated with computer systems, they enable intelligent control of entire flow systems.

Manufacturing & Welding Hurdles:

• Complex Component Architecture: The flowmeter consists of a magnetic circuit system, measuring tube, electrodes, lining, converter, and the housing (shell). The housing is the core welding component.
• High Seam Density: A single housing unit requires the welding of 8 ring (circumferential) seams and 1 longitudinal seam. This creates a massive workload with numerous welding points.
• Stringent Consistency Requirements: Because these units are core components, they demand extremely high consistency in welding quality and efficiency to match the sealing and performance requirements of the instrument.
• Manual Production Limitations: Traditional manual welding is slow and prone to human error, such as uneven weld formation, missed welds, or welding deviations.
• Assembly and Precision Risks: Variations in workpiece assembly require a system capable of capturing the precise seam position and automatically compensating for errors to ensure structural integrity and pressure resistance.

• Efficiency Surge: Real-world implementation has shown a welding efficiency increase of over 60% for small-bore housing production.
• Professional Standard Formation: Automated processes ensure that internal and external weld beads are uniform, dense, and meet the strict sealing requirements for flowmeters.
• Compliance with Safety Specs: The resulting weld structural strength and sealing fully comply with safety technical specifications for pressure equipment housings.
• Reduced Labor Dependency: Manufacturers have successfully transitioned from relying on high-skilled veteran welders to using general staff, drastically lowering recruitment and training costs.
• Standardized Production: Automated parameter control has eliminated manual defects like "welding deviation" or "lack of penetration," ensuring a higher factory pass rate.