AITECH provides specialized Non-Destructive Testing (NDT) services for the railway and urban metro systems, ensuring accurate technical assessment, early detection of defects, and safe operation of railway infrastructure.
Our services include:
We apply specialized ultrasonic inspection techniques to evaluate aluminothermic welds used for rail joints during construction and maintenance.
Fully compliant with BS EN 14730-1, which defines technical requirements and inspection methods for rail welds in railway track systems.
Detects defects such as longitudinal cracks, transverse cracks, lack of fusion, blowholes, shrinkage cavities, and other discontinuities affecting rail integrity.
Applied to surface inspection of welds and areas subject to high stress, including rails, wheel axles, and steel structural components.
Effectively identifies fine cracks, fatigue cracks, and open-to-surface defects.
Suitable for ferromagnetic components within the railway system.
Ideal for non-ferromagnetic materials such as aluminum alloys and stainless steel.
Detects very small surface-breaking defects such as micro-cracks, porosity, pinholes, and weld imperfections.
Applied on weld surfaces, rail components, rail plates, and turnout parts.
The PAUT technique is used to inspect wheel axles, drive axles, and rotating parts of metro trains.
Provides multi-angle ultrasonic imaging with high resolution.
Accurately evaluates defect depth, shape, and orientation.
Enables early detection of fatigue cracks, corrosion-related defects, and internal structural anomalies.
Eddy Current Testing is applied to detect surface and near-surface defects on conductive materials within the railway system.
Suitable for rails, rail fasteners, anchor bolts, and small structural components.
Enables fast, on-site inspection without removing coating, paint, or protective layers.
Eddy Current Testing (ECT) is a non-destructive testing method that uses electromagnetic induction to detect surface and near-surface defects in conductive materials. At AITECH, we employ AVIKO 4080 G2 machine to conduct 100% inspection of steel balls used in wind energy, precision machinery, and automotive industries.
An alternating current is applied to the probe to generate a magnetic field. When the probe is placed near a metallic surface, eddy currents are induced. Defects disrupt the current flow, resulting in a change in electrical impedance, which is recorded and analyzed.
Balls are demagnetized (<1 Gauss)
Testing room controlled at 18°C to 28°C, dust-free and free of direct sunlight
Clean surfaces are mandatory
Use certified Master Balls with artificial defects for sensitivity setup
Adjust frequency, phase angle, and gain for each ECT channel
Calibration check performed every 4 hours or per batch
Steel balls pass through AVIKO’s high-speed ECT sensors
Automatic classification:
Acceptable (OK)
Reworkable (repair and retest once)
Rejected (NG)
NG balls undergo Macro Test using hydrochloric acid
If cracks or metallurgical defects are found, balls are scrapped
AVIKO 4080 G2 – EN 15548 compliant
Multi-frequency ECT Sensors (150–3600 kHz, standard at 400 kHz)
2-core and 4-core ferrite probes available
EMT software allows phase angle and gain adjustments
SNT-TC-1A (2024 Edition) – Personnel qualification
EN 15549, EN 15548-1/2/3 – ECT system performance and compliance
P3C-WE-0014 – Bearing processing requirements
AITECH-NDT-WP-001 – Internal written practice for certification
Steel balls for wind turbine bearings
Components for precision machinery
Balls and parts in automotive and aerospace sectors
Round or spherical conductive parts
Technicians certified to Level II
Procedures approved and audited by Level III expert
Regular sensitivity validation and system calibration
Full reporting with defect data, images, and traceability
Address: 119/27 Bui Quang La, An Hoi Tay Ward, Ho Chi Minh City
Branch: 23, Street 27, Van Phuc Residential, Hiep Binh Ward, Ho Chi Minh City
Hotline: (+84) 98 139 8185 – 090 886 4479
Email: aitech@ndt.com.vn
Website: https://ndt.com.vn
Overview
API 579-1/ASME FFS-1 is a globally recognized standard that provides structured assessment procedures to evaluate the fitness-for-service (FFS) of in-service equipment in the oil & gas, petrochemical, and chemical industries. Jointly developed by the American Petroleum Institute (API) and ASME, this standard enables operators to determine whether pressure vessels, piping, and storage tanks can safely remain in operation, be rerated, or require repair or replacement.
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API 579-1/ASME FFS-1 covers a wide range of damage mechanisms and degradation modes, including:
General and local metal loss
Pitting corrosion
Brittle fracture
Crack-like flaws
Creep damage
Blisters and laminations
Weld misalignment and distortion
Fire and thermal damage
These assessments are applicable to components fabricated under ASME BPVC, ASME B31.3, API 650, API 620, and other internationally accepted design codes.
The standard outlines three assessment levels (Level 1, Level 2, and Level 3) based on the complexity and accuracy needed:
Level 1: Quick screening using conservative assumptions
Level 2: Intermediate assessment with simplified engineering calculations
Level 3: Detailed analysis using finite element analysis and fracture mechanics
FFS assessments help evaluate:
Present structural integrity
Remaining life estimation
Suitability for rerating
Risk-based inspection planning
These are essential for asset integrity management, avoiding unnecessary shutdowns, and optimizing maintenance costs.
At AITECH, we provide comprehensive FFS evaluations and rerating services in compliance with API 579-1/ASME FFS-1. Our certified engineers use advanced techniques and proprietary tools to ensure your equipment continues to operate safely and reliably.
AITECH also provides comprehensive inspection services for:
Helifuel System Inspection Services: Ensure the safety and compliance of helifuel systems in offshore platforms and helidecks.
Helideck Friction Testing Services: Evaluate and certify surface friction levels to meet CAP 437 standards and international safety requirements. AITECH provides Helideck inspection services in compliance with the CAP 437 international standard issued by the UK Civil Aviation Authority (UK CAA). This service ensures that helidecks on offshore platforms, FPSO vessels, and offshore structures meet the highest safety standards, allowing helicopters to land and take off safely in all weather conditions.
Helideck Surface and Friction Testing: Evaluate surface flatness, anti-slip properties, and friction coefficient.
Lighting Systems: Inspect perimeter lights, directional lights, and H marking lights according to standards.
Markings and Signage: Review all painted markings, H markings, touchdown positioning circles, and load-bearing information.
Load-Bearing and Structural Integrity: Assess the structural integrity and load-bearing capacity of the helideck.
Anti-Static Grounding System: Verify grounding systems to dissipate static electricity safely.
Surface Drainage Capability: Ensure rainwater and spilled fuel do not accumulate on the deck.
Safety Net and Firefighting Equipment: Evaluate safety nets, fire extinguishers, foam spray systems, and emergency equipment.
Helideck Micro GripTester for surface friction measurement
Surface flatness and slope measuring tools
Lighting system testing equipment
Earth resistance testing tools
Dimensional and clearance measuring device
Maximum flight safety for crew and platform personnel
Full compliance with international CAP 437 standards
Enhanced trust and credibility with partners and clients
Improved operational efficiency and reduced downtime
Expert consultation from experienced engineers
Lower insurance costs due to certified safety compliance
Regular inspections
Pre-operational inspections: After installation or upgrade
Post-incident or major repair inspections
Inspections after extreme weather events
AITECH Company
Address: 119/27 Bui Quang La Street, Ward 12, Go Vap District, Ho Chi Minh City, Vietnam
Hotline: (+84) 98 139 8185 / 090 886 4479
Email: maianhtai@ndt.com.vn
Website: https://ndt.com.vn
AITECH provides Acoustic Emission (AE) Testing Services for oil storage tanks, oil storage tanks. This is an advanced non-destructive testing (NDT) method that allows the early detection of potential damage such as leaks, corrosion,bottom plate of tank without dismantling or stopping operations. AE testing identifies the location, intensity, and growth trend of defects, ensuring safe operation and extending the service life of the equipment.
AITECH is internationally accredited with ILAC-MRA ISO 17025 for Acoustic Emission Testing, ensuring the accuracy and reliability of test results according to global standards.
Leak and Defect Detection: Accurately identify the location of leaks and defects inside tank walls, tank bottoms.
Corrosion Assessment: Monitor corrosion levels inside storage tanks over time, especially in high-pressure areas.
Real-Time Monitoring: Continuously collect AE data during operation to detect early warning signs of abnormalities and provide timely alerts.
Defect Growth Analysis: Predict the potential spread of defects based on analyzed data.
Comprehensive Condition Assessment: Provide a detailed report on the current state of the tank, suggesting maintenance or replacement solutions when necessary.
Acoustic Emission Sensors (AE Sensors)
AE Data Acquisition System
Advanced AE Data Analysis Software
Vallen Acoustic Equipment from Germany: Vallen AMSY-6, a state-of-the-art acoustic emission monitoring system that allows for precise analysis of abnormal sound sources within storage tanks, early detection of cracks, corrosion, or structural changes.
Early Detection of Potential Damage: Helps prevent major incidents before they happen.
No Need to Shut Down Operations: Minimizes downtime and optimizes operational efficiency.
Cost-Effective Maintenance: Early detection allows for efficient planning of routine maintenance.
Enhanced Safety in Operation: Prevents fire hazards and severe damage to oil storage tanks.
Compliance with International Standards: AE testing complies with ASTM, ASME, and API standards.
Detailed and Reliable Inspection Reports: Provides comprehensive analytical data and illustrated reports.
Utilization of Vallen Acoustic Equipment from Germany: Advanced monitoring system enhances the precision and reliability of inspection results.
Collaboration with API 653 and ASNT Level 3 AE Experts: Comprehensive evaluation of tank integrity with detailed analysis and optimal technical solutions.
Periodic Inspection: Every 12–24 months.
AITECH Company
Address: 119/27 Bui Quang La Street, Ward 12, Go Vap District, Ho Chi Minh City, Vietnam
Hotline: (+84) 98 139 8185 / 090 886 4479
Email:maianhtai@ndt.com.vn
Website:https://ndt.com.vn
AITECH offers advanced Magnetic Flux Leakage (MFL) services to inspect and map corrosion on tank floors for aboveground storage tanks (AST). This non-destructive testing method detects metal loss and pitting, making it ideal for tanks storing fuels, chemicals, or crude oil.
High-speed scanning over large floor areas.
Accurate detection of corrosion depth and location.
Outputs include 2D/3D digital corrosion maps.
Fully compliant with international standards such as API 653 and EEMUA 159.
Routine inspection of petroleum and chemical storage tanks.
Turnaround and maintenance programs.
Applicable codes: API 653, EEMUA 159
Equipment: Silverwing Floormap3D, Eddyfi MFL, Truflux, MFE and other modern tools.
PEOPLE CONCERNED
Every people beginning in the method wishing taking the certification level 1 or every people with experience in the UT method and who want taking the certification level 2 or Level 3 in accordance with SNT-TC-1A: 2016
OBJECTIVE
■ To prepare at specific training of industrial sector in the method.
■ To know the field of application of the method and the limits.
■ To assimilate the theorical knowledge necessary to a control.
■ To have sufficient technical knowledge and skills to be qualified to set up and calibrate equipment and
■ To be able to interpret and evaluate results with respect to applicable codes, standards, and specifications.
PRACTICAL
Picture 1: UT equipment
■ Theorical training given in classroom with book and multimedia and in laboratory for the field works.
■ Each student has an equipped for practical work.
■ Each student has differient type of flaw specimen for practical work.
Phased array is an advanced method of ultrasonic testing and can be used for a multitude of different inspection tasks. Present day structural assessment, flaw analysis, fitness-for-service assessment and engineering critical assessments require flaw data in a more accurate and precise way with regard to their location, shape and size. Phased array ultrasonic technology with its associated flaw evaluation software can provide flaw data accurately and precisely for the fracture mechanics based acceptance standard.
This techniqueis used to detect flaws that cannot be easily found with conventional nondestructive testing methods such as radiography and manual ultrasonic testing. Intertekspecialises in the use of phased array in the oil and gas, power generation and chemical industries, especially for the construction of new piping, pipelines, vessels and structural welded members providing Total Quality Assurance. We also use the technique in petrochemical plants, when quick and accurate inspections are necessary due to time constraints during outages.
A phased array probe is made up of multiple small ultrasonic transducers, each of which can be pulsed individually. By varying the timing of the pulse of each individual transducer, the ultrasonic beam can be ‘steered’ to a specific angle and focal distance – i.e. the beam can be swept through the examined object.
Applications for phased array:
Flaws that phased array can detect: Weld flaws such as lack of fusion, slag inclusions, porosity, inside diameter / outside diameter (I.D./O.D.) cracks, centreline cracks and incomplete penetration erosion or corrosion – pitting, material loss and root erosion inherent discontinuities in forged or casting materials such as laminations, forging bursts, cold shuts, hot tears and inclusions environmentally or process induced damage such as MIC, HIC, thermal fatigue cracking, caustic cracking and stress corrosion cracking.
Phased array has several advantages in comparison to other non-destructive techniques. It allows for faster examinations compared to manual ultrasonic testing. Information can be displayed in multiple display formats (for example, A, B, C and D scans), which help in more accurate interpretation of flaws. The data can also be captured and stored so it can be reviewed by the inspector and used for future reference and inspections. A further benefit of phased array is safety. There is no radiation or environmental hazards compared to radiography. With phased array there is no need to shut down operations due to radiation exposure so there is less wasted man hours and increased production.
PARTICIPANTS
■ Technician
■ NDT technician Engineer
■ Supervising engineer....
COURSE OBJECTIVES
■ Understanding the principle and application of Eddy Current Testing
■ Understanding the advantages and disadvantages of the method and choose the appropriate technique for testing
■ Having sufficient knowledge and competence to carry out standardization of test equipment in accordance with required standards.
■ Being able to interpret and evaluate test results according to regulations, standards and technical requirements.
■ Being able to report testing results according to proper testing procedure
PRACTICE
Practicing Eddy Current Testing method by using Eddy Current Testing Equipments and a viriety of flaw speciment systems.
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Eddy Current Testing for Tube.
Eddy Current Testing is based on ASME V, VIII, B31.1 và AWS D 1.1:
What is Visual Testing?
Visual testing is a Non-Destructive Testing method by which reflected or transmitted light from a test object is imaged with a light sensitive device.
What are the responsibilities of a individual who is certified to Visual Testing?
An individual certified to Visua Level 2 has demonstrated competence to perform NDT according to Visual Testing procedures. Within the scope of the competence defined on the certificate, Level 2 personnel may be authorised by the employer to:
OBJECTIVE
PRACTICAL
PARTICIPANTS
■ Technician
■ NDT technician Engineer
■ Supervising engineer....
COURSE OBJECTIVES
■ Understanding the principle and application of Magnetic Flux Leakage
■ Understanding the advantages and disadvantages of the method and choose the appropriate technique for testing
■ Having sufficient knowledge and competence to carry out standardization of test equipment in accordance with required standards.
■ Being able to interpret and evaluate test results according to regulations, standards and technical requirements.
■ Being able to report testing results according to proper testing procedure
This qualification adds reliability and confidence to the Magnetic Flux Leakage (MFL) inspections of Above Ground Storage Tanks (AST’s), and provides assurance to asset owners that technicians are of a demonstrated competence.
It provides the first SNT-TC-1A MFL training course for the inspection of AST’s. It provides an independently verified combined Level 1 and 2 qualification for SNT certification against a published Written Practice.
The 80 hour Level I/Level 2 course and examinations cover the General Theory of MFL, the Specific Theory of controlling codes and specifications and practical application using modern MFL equipment. It is aligned with syllabus published by ASNT standard Topical Outlines for Qualification of NDT personnel ANSI/ASNT CP- 105:2016 and the qualification, examinations and certification are based on the ASNT recommended practice SNT-TC-1A as documented in a specific and detailed written practice provided as part of the course.
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PARTICIPANTS
■ Technician
■ NDT technician Engineer
■ Supervising engineer....
COURSE OBJECTIVES
■ Understanding the principle and application of magnetic particle testing
■ Understanding the advantages and disadvantages of the method and choose the appropriate technique for testing
■ Having sufficient knowledge and competence to carry out standardization of test equipment in accordance with required standards.
■ Being able to interpret and evaluate test results according to regulations, standards and technical requirements.
■ Being able to report test results according to proper test procedure
PRACTICE
Practicing magnetic particle testing method by using a Yoke, Coil and a viriety of flaw speciment systems.
Magnetic Particle Testing for welding.
Magnetic Particle Testing is based on ASME V, VIII, B31.1 và AWS D 1.1:
It is commonly used to detect defects in castings, forgings and weldments. AITECH works with all industry sectors including aerospace, power generation, petrochemical and oil and gas, and we can provide dye penetrant inspection on-site at our customer.
Our techniques for dye penetrant inspection include:
Applicable standard:
Visual testing provides a means of detecting and examining a variety of surface discontinuities. It is also the most widely used method for detecting and examining for surface discontinuities associated with various structural failure mechanisms. Even when other nondestructive tests are performed, visual tests often provide a useful supplement. For example, when the eddy current testing of process tubing is performed, visual testing is often performed to verify and more closely examine the surface condition. This verification process can impact the evaluation process associated with other nondestructive test methods being used. The following discontinuities may be detected by a simple visual test: surface discontinuities, cracks, misalignment, warping, corrosion, wear and physical damage.
Applicable standard:
AITECH JOINT STOCK COMPANY
THE RELIABILITY OF NON-DESTRUCTIVE TESTING
Headquarter:119/27 Bui Quang La Street, An Hoi Tay Ward, Ho Chi Minh city.
Brach: No. 23, Street 27, Van Phuc Residential, Hiep Binh Ward , Ho Chi Minh City
Phone: (+84) 908 886 827, 0981398185
Email:maianhtai@ndt.com.vn
