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NDT Techniques

JFIMS routinely perform a broad range of techniques, because in non-destructive testing, there is no single technique which is universally applicable and offers all the answers. Each technique has its advantages and disadvantages, so the choice of technique is a subject in itself. JFIMS can analyse your inspection requirements and tailor an inspection regime to offer you the best solution and value for money.

• X-ray and gamma ray radiography
• Ultrasonic Testing
• TOFD
• Ultrasonic Imaging
• IRIS
• Dye Penetrant
• Magnetic Particle
• Eddy Current
• Corrosion & Erosion Mapping

Radiographic Inspection

Radiography is a versatile tool for the inspection of a wide variety of items. JFIMS has 16 fully-equipped bays for 'shop' inspections and equipment for 'field' radiography using x ray for applications requiring high definition or gamma ray techniques where high energy is required, e.g. screening thick wall material.

All gamma radiography is performed using the low emission Saferad system which provides high sensitivity at reduced risk and is more 'site friendly' in terms of permits and work area restrictions.

Applications include the 'as built' quality control and in-service condition assessment of welds, forgings & castings.

Using 'profile' radiography it is possible to perform 'double wall/single image' assessment of through wall condition to establish the presence and extent of metal loss through corrosion or internal lining breakdown and fouling.

We offer a full range of conventional code compliant ultrasonic testing services using both analogue and digital flaw detection equipment.

The techniques used include normal compression wave testing for wall thickness measurement, angled shear and compression wave testing for volumetric testing such as weld inspection and more sophisticated Lamb and Creep Wave methods for near surface defect detection and the assessment of structural damage such as micro-cracking.

TOFD

JFIMS has a considerable amount of experience in the use of Time of Flight Diffraction in a wide variety of applications across many industrial sectors. This ranges from very sophisticated applications involving the detection, sizing and characterisaton of micro-structural anomalies on metallurgically and geometrically complex components to routine weld quality testing and backwall profiling on process pipework, pressure vessels and storage spheres.

IRIS

We offer Internal Rotary Inspection System testing for heat exchanger tubes and other pipes where there is access. JFIMS has two semi-automated computer driven systems for on-site testing work.

Ultrasonic Imaging

We offer a comprehensive range of advanced ultrasonic imaging techniques applicable to simple tasks like wall thickness measurement and weld inspection through to highly complex tasks such as the assessment of micro-structural damage. These include manually, mechanically or robotically deployed contact, gap scan, immersion & jet probe techniques.

Dye Penetrant and Magnetic Particle Inspection

We offer in-house and on-site inspection using colour contrast and ultraviolet techniques.

Corrosion and Erosion Mapping

Corrosion and erosion costs industry millions every year; in various form which are as complex and diverse as the mechanisms at play. JFIMS exploits a variety of techniques to map corrosion in plant vessels and pipework including:
These include -

• Automated ultrasonic corrosion mapping
• High resolution ultrasonic through wall imaging
• TOFD back wall profiling
• Ultrasonic OD/ID surface wave inspection
• Low emission radiography
• DPI, MP & EC surface micro-crack detection
• Remote field eddy current
• Remote visual inspection
• IRIS & eddy current tube inspection

Most of these techniques are inherently safe and non-invasive - so can be used 'on stream' with minimal preparation or disruption. Some can be remotely deployed and so reduce 'access' requirements.

Combinations

Very often these complementary techniques are used in combination to ensure adequate coverage.

© 2008 James Fisher Inspection and Measurement Services