Magnetic Flux Leakage (MFL) Probe

Magnetic Flux Leakage (MFL) Probe

Brand: TheSonic India
Product Name: Magnetic Flux Leakage (MFL) Probe
Product Category: Electromagnetic Tube Inspection Probes
Inspection Method: MFL / Magnetic Flux Leakage Testing
Application: Ferromagnetic tube inspection, carbon steel tube inspection, boiler tubes, heat exchanger tubes, fin-fan tubes, air cooler tubes, and process tubes
Email: i@thesonic.com

Product Overview

TheSonic India Magnetic Flux Leakage (MFL) Probe is used for non-destructive inspection of ferromagnetic materials where corrosion, pitting, erosion, wall thinning, and metal loss defects need to be detected efficiently. MFL is commonly used for carbon steel tube inspection and other magnetizable component inspection applications.

During MFL inspection, the probe magnetizes the tube wall or inspected component. In sound areas, the magnetic flux remains mostly contained within the material. When the probe passes over corrosion, pitting, wall loss, erosion, thinning, cracks, or geometry changes, the magnetic field is disturbed and part of the magnetic flux leaks out of the material. Sensors inside the probe detect this leakage field and convert it into inspection signals for evaluation.

The MFL Probe is suitable for fast screening and condition assessment of ferromagnetic tubes where inspection productivity, sensitivity to metal loss, and practical field performance are important. The probe can be customized based on tube ID, wall thickness, tube material, magnetizer design, sensor arrangement, cable length, connector type, and inspection instrument compatibility.

Working Principle / Technology Overview

Magnetic Flux Leakage testing works by magnetizing a ferromagnetic material to a controlled level. The magnetic field travels through the material. In areas where the tube wall is uniform, the magnetic flux path remains stable. When there is a defect such as corrosion, pitting, erosion, thinning, wear, or metal loss, the magnetic flux is disturbed and leaks outside the material.

The MFL probe detects this leakage field using magnetic sensing elements. Depending on the probe design, the sensing arrangement may include Hall-effect sensors, magnetic sensors, pickup coils, or other suitable magnetic field detection elements. The signal amplitude, phase, shape, and position are analyzed to identify the presence and severity of indications.

In tube inspection, the probe is moved through the tube internal diameter. The magnetic circuit, magnet strength, sensor spacing, probe diameter, inspection speed, tube wall thickness, and material properties all influence the inspection response. Proper calibration and reference standards are required for reliable interpretation.

Technology Advantages

·       Fast inspection method for ferromagnetic tubes

·       No liquid couplant required for standard MFL inspection

·       Suitable for carbon steel and other magnetizable materials

·       Sensitive to volumetric metal loss and corrosion damage

·       Useful for detecting ID and OD wall loss, subject to probe design and calibration

·       Suitable for tube screening and maintenance inspection

·       Practical for field inspection and shutdown projects

·       Supports high-speed data collection depending on instrument and probe configuration

·       Useful for prioritizing tubes for repair, plugging, replacement, or further evaluation

Key Features

·       Designed for Magnetic Flux Leakage inspection of ferromagnetic tubes

·       Suitable for carbon steel tube inspection applications

·       Useful for detecting corrosion, pitting, erosion, wall loss, thinning, and metal loss defects

·       Can support ID and OD metal loss detection, subject to calibration and probe configuration

·       Suitable for boiler tubes, heat exchanger tubes, fin-fan tubes, air cooler tubes, and process tubes

·       Probe diameter can be selected based on tube ID and required inspection coverage

·       Sensor arrangement can be customized based on inspection requirement

·       Magnetizer strength and magnetic circuit design can be selected based on tube wall thickness and material

·       Cable length and connector type can be supplied as per instrument compatibility

·       Available in standard or customized probe configurations

·       Compatible with suitable MFL instruments, subject to interface confirmation

·       Suitable for field inspection, shutdown inspection, maintenance inspection, and tube condition assessment

Detailed Product Description

The Magnetic Flux Leakage (MFL) Probe from TheSonic India is designed for inspection of ferromagnetic tubes and components where metal loss detection is required. The probe creates a magnetic field in the material and monitors leakage fields generated by discontinuities, corrosion, or wall thickness changes.

MFL is widely used for carbon steel tube inspection because ferromagnetic materials can be magnetized effectively. When the probe passes over areas affected by corrosion, pitting, erosion, wall thinning, or mechanical wear, the magnetic flux leakage pattern changes. These signal changes are recorded by the inspection instrument and evaluated against calibration references.

For tube inspection, the MFL probe design must be matched to the tube internal diameter, wall thickness, material, inspection speed, sensor arrangement, and instrument interface. A properly selected probe helps improve signal stability, defect detectability, and inspection repeatability.

TheSonic India MFL Probes can be manufactured in different sizes and customized configurations based on customer inspection requirements. Probe design may include customized magnetizer geometry, sensor spacing, sensor quantity, cable length, connector type, and mechanical body configuration based on the application.

Inspection Capability

Magnetic Flux Leakage (MFL) Probes can support detection and evaluation of:

·       Internal corrosion

·       External corrosion

·       General metal loss

·       Localized wall thinning

·       Pitting corrosion

·       Erosion damage

·       Tube wall loss

·       Fretting-related metal loss

·       Wear at support areas

·       Boiler tube degradation

·       Fin-fan and air cooler tube wall loss

·       Crack-like indications depending on orientation, magnetization direction, sensor design, and inspection setup

Final inspection capability depends on tube material, tube diameter, wall thickness, magnetization level, sensor type, probe speed, calibration reference, tube cleanliness, instrument setup, and approved inspection procedure.

Typical Applications

·       Carbon steel tube inspection

·       Ferromagnetic heat exchanger tube inspection

·       Boiler tube inspection

·       Fin-fan tube inspection

·       Air cooler tube inspection

·       Process tube inspection

·       Tube wall loss assessment

·       Corrosion and erosion detection

·       Pitting detection

·       Maintenance and shutdown inspection

·       Tube screening and condition assessment

·       Industrial reliability and integrity inspection

·       Follow-up inspection planning for tubes requiring confirmation by other NDT methods

Suitable Materials

MFL Probes are generally suitable for ferromagnetic materials that can be magnetized effectively. Typical applications may include:

·       Carbon steel tubes

·       Low alloy steel tubes

·       Ferromagnetic boiler tubes

·       Ferromagnetic heat exchanger tubes

·       Ferromagnetic fin-fan tubes

·       Ferromagnetic air cooler tubes

·       Ferromagnetic process tubes

·       Other magnetizable materials, subject to application review

For non-ferromagnetic materials such as austenitic stainless steel, copper alloy, brass, titanium, and Inconel tubes, Eddy Current Testing (ECT) probes are generally more suitable. For ferromagnetic tube applications requiring remote-field wall loss assessment, RFET may also be considered. For near-ID fin-fan tube defects, NFT may be suitable depending on the inspection objective.

MFL Probe Configuration Options

TheSonic India Magnetic Flux Leakage Probes can be supplied in different configurations based on customer requirement. Available design options may include:

·       Standard MFL probe configuration

·       Flexible MFL probe configuration, where tube path requires flexibility

·       Axial magnetization or circumferential magnetization design, subject to inspection objective

·       Multi-sensor MFL probe arrangement

·       Hall sensor or magnetic sensor-based configurations, subject to design requirement

·       Customized probe diameter based on tube ID

·       Customized magnetizer strength and pole arrangement

·       Customized cable length

·       Customized connector type

·       Probe design for boiler, fin-fan, air cooler, and heat exchanger tube applications

·       Project-specific probe design based on calibration standard and inspection requirement

Technical Information

Probe Selection Considerations

Correct MFL probe selection is important for reliable inspection performance. The following details are normally required:

·       Tube outside diameter

·       Tube inside diameter

·       Tube wall thickness

·       Tube material

·       Tube length

·       Tube type: boiler tube, fin-fan tube, air cooler tube, heat exchanger tube, or process tube

·       Straight tube or bend tube configuration

·       Required inspection coverage

·       Target defect type: corrosion, pitting, erosion, metal loss, thinning, or cracking

·       Defect location concern: ID, OD, or both

·       Inspection instrument model

·       Required connector type

·       Cable length requirement

·       Probe flexibility requirement, if any

·       Sensor configuration requirement, if available

·       Magnetization requirement, if available

·       Calibration tube / reference standard details

·       Site inspection condition

·       Required quantity

Compatibility and Customization

TheSonic India Magnetic Flux Leakage Probes can be customized for different ferromagnetic tube sizes, inspection instruments, tube applications, and project requirements. Probe compatibility can be confirmed based on instrument connector, channel configuration, tube ID, wall thickness, material, magnetizer design, sensor arrangement, cable requirement, and approved inspection procedure.

These probes can be supplied for suitable MFL inspection systems used in industrial tube inspection, subject to technical confirmation and interface review.

Recommended Industries

·       Oil & Gas

·       Refineries

·       Petrochemical Plants

·       Power Plants

·       Fertilizer Plants

·       Chemical Process Plants

·       Boiler Maintenance

·       Heat Exchanger Maintenance

·       Fin-Fan Tube Inspection

·       Air Cooler Maintenance

·       Process Equipment Inspection

·       NDT Service Companies

·       Inspection and Quality Control Laboratories

Why Choose TheSonic India Magnetic Flux Leakage Probes?

TheSonic India Magnetic Flux Leakage Probes are designed for reliable inspection of ferromagnetic tubes where corrosion, pitting, erosion, thinning, and metal loss detection are important. These probes support practical field inspection, customized sizing, application-specific sensor arrangements, and compatibility with suitable MFL inspection systems.

They are suitable for customers requiring dependable MFL probe solutions for boiler tube inspection, fin-fan tube inspection, air cooler tube inspection, carbon steel tube inspection, shutdown inspection, and industrial tube condition assessment.

Inventory / Quotation Short Description

Magnetic Flux Leakage (MFL) Probe for ferromagnetic tube inspection, suitable for carbon steel boiler tubes, heat exchanger tubes, fin-fan tubes, air cooler tubes, and process tubes. Designed for corrosion, pitting, erosion, wall loss, thinning, and metal loss detection. Probe size, sensor arrangement, cable length, connector type, and compatibility shall be as per final technical configuration.

Contact Note

For technical details, probe compatibility confirmation, product customization, commercial quotation, or bulk supply requirements, please contact TheSonic India.

Email: i@thesonic.com
Brand: TheSonic India