Project Overview
Project Name: Automatic Fluorescent Magnetic Particle Inspection System for Steel Pipe Ends
Equipment Model: CDW-20000AT
Application: Steel Pipe End Crack Detection
Industry: Steel Pipe Manufacturing / Oil & Gas NDT Inspection
Customer Background
A steel pipe manufacturer required an advanced non-destructive testing solution for inspecting critical areas of steel pipes.
During steel pipe manufacturing, the pipe end area is a key inspection zone because stress concentration, machining, heat treatment, and forming processes may cause surface or near-surface defects.
To ensure product quality and reliability, the customer needed an automatic magnetic particle inspection system capable of detecting small cracks on both internal and external surfaces of steel pipe ends.
Customer Requirements
The customer required a reliable steel pipe end inspection system with the following capabilities:
Inspection Range
- Pipe outer diameter: 60–180 mm
- Pipe length: 9–13 m
- Wall thickness: 4.83–25 mm
- Inspection area: 0–350 mm from both pipe ends
Defect Detection Requirements
The system should be able to detect:
- Surface cracks;
- Near-surface defects;
- Fatigue cracks;
- Defects caused by forging, machining, and heat treatment processes.
Production Requirements
The customer also required:
- Automatic loading and unloading;
- High inspection efficiency;
- Stable inspection sensitivity;
- Continuous operation capability for industrial production.
Project Challenges
1. Detecting Different Crack Directions
Steel pipe end defects may appear in different directions. A single magnetization method cannot guarantee complete inspection coverage.
Therefore, the inspection system needed to provide multiple magnetic fields for comprehensive crack detection.
2. Handling Long Steel Pipes
With pipe lengths up to 13 meters, the system required a stable transportation and positioning mechanism to ensure accurate inspection.
3. Improving Inspection Efficiency
Manual inspection methods can be time-consuming and inconsistent.
The customer needed an automated solution to reduce labor requirements while improving inspection reliability.
4. Ensuring Clear Fluorescent Inspection Results
Fluorescent magnetic particle inspection requires a controlled inspection environment to achieve clear magnetic indications.
Our Solution
Based on the customer’s requirements, NK NDT designed and manufactured a customized:
CDW-20000AT Automatic Fluorescent Magnetic Particle Inspection System
The system integrates:
- Automatic pipe loading and unloading;
- Dual-direction magnetization;
- Fluorescent magnetic particle application;
- UV inspection system;
- Automatic demagnetization.
The complete solution provides efficient and reliable inspection for steel pipe end areas.
System Configuration
1. Automatic Loading and Transportation System
The system is equipped with:
- Loading rack;
- Step-by-step transportation mechanism;
- Positioning system;
- Finished product and rejected product collection system.
The automated material handling process improves production efficiency and reduces manual operation.
2. Dual Magnetization System
The steel pipe MPI machine uses two independent magnetization systems:
Circumferential Magnetization
Used for detecting longitudinal defects along the pipe surface.
Longitudinal Magnetization
Used for detecting circumferential cracks.
By combining two magnetization directions, the system provides comprehensive inspection coverage of steel pipe ends.
3. Fluorescent Magnetic Particle Inspection System
The inspection system includes:
- Automatic magnetic suspension spraying system;
- Magnetic particle circulation and filtration system;
- LED UV black light system;
- Enclosed dark inspection chamber.
The optimized inspection environment ensures clear magnetic particle indications and improves defect detection accuracy.
4. Automatic Demagnetization System
After inspection, the system performs automatic demagnetization to reduce residual magnetism and meet subsequent processing requirements.
Key Features and Advantages
Comprehensive Crack Detection Capability
The combination of circumferential and longitudinal magnetization enables detection of various surface and near-surface cracks.
Fully Automated Inspection Process
The complete workflow includes:
Steel pipe loading → Positioning → Magnetization → Fluorescent inspection → Demagnetization → Unloading
This reduces manual operation and improves inspection consistency.
High Inspection Sensitivity
Under standard inspection conditions, the system can effectively detect small defects on internal, external, and near-surface areas of steel pipe ends.
Designed for Industrial Production
The robust structure and industrial control system allow stable operation in demanding manufacturing environments.
Project Results
After implementing the automatic magnetic particle inspection system, the customer achieved:
Improved Inspection Efficiency
The automated inspection process increased production efficiency and reduced inspection time.
Enhanced Quality Control
Reliable crack detection helped the customer improve steel pipe quality assurance and reduce potential product risks.
Reduced Labor Requirements
Automatic transportation and inspection functions minimized manual workload.
Stable Production Performance
The system provided a long-term NDT solution for steel pipe manufacturing applications.
Applications
This steel pipe end inspection system is suitable for:
- Oil and gas pipes;
- OCTG (Oil Country Tubular Goods);
- Seamless steel pipes;
- Drill pipes;
- Pressure equipment pipes;
- Industrial steel pipe manufacturing.
About NEWK NDT
NK NDT is a professional manufacturer of non-destructive testing equipment, providing customized inspection solutions for global industries.
Our products include:
- Magnetic Particle Inspection (MPI) Systems;
- Fluorescent Penetrant Inspection (FPI) Lines;
- Industrial Ultrasonic Cleaning Systems;
- Demagnetization Equipment;
- Customized NDT Automation Solutions.
With advanced technology and engineering experience, NK NDT helps manufacturers improve inspection efficiency, product reliability, and quality control.