Gulf Energy Int.

We provide NDT services to assist with integrity appraisal at fabrication, in-service or decommissioning stage. Our range of NDT services cover standard NDT methods and the advanced techniques.

Non-destructive testing from GEI ensures the safe and efficient operation of your equipment and assets by detecting defects before they result in severe damage, and assures compliance with international standards.

MAGNETIC PARTICLE INSPECTION

Magnetic particle inspection - proven and reliable, MPI uses magnetic ﬁeld patterns to detect surface/near-surface ﬂaws in ferrous materials.

Magnetic particle testing works by magnetizing a ferromagnetic specimen using a magnet or special magnetizing equipment. If the specimen has discontinuity, the magnetic field flowing through the specimen is interrupted and leakage field occurs. Finely milled iron particles coated with a dye pigment are applied to the specimen. These are attracted to leakage fields and cluster to form an indication directly over the discontinuity. The indication is visually detected under proper lighting conditions.

The basic procedure that is followed to perform magnetic particle testing consists of the following:

Pre-cleaning of component
Introduction of Magnetic field
Application of magnetic media

Interpretation of magnetic particle indications our experienced and qualified NDT inspector.

DYE PENETRANT INSPECTION

Dye Penetrant Inspection, also known as Penetrant Testing (PT), Liquid Penetrant Inspection (LPI) or Fluorescent Penetrant Inspection (FPI).

Dye penetrant inspection – DPI is the fast, low-cost means of detecting surface-extruding ﬂaws such as cracks or porosity over large areas. Liquid penetrant is applied to the surface and left to soak, being drawn into any cracks by capillary action. Excess penetrant is then removed and a developer applied to draw out the penetrant from cracks, to enable a visual Inspection of any defects. Accurate interpretation is achieved by utilizing our seasoned NDT qualified Penetrant Testing Inspectors.

The types of defects that can be found with penetrant testing are:

Rolled Products: Penetrant identifies anomalies (cracks, seams or laminations)
Castings: cold shuts, hot tears, porosity, blow holes or shrinkage
Forgings: Illuminating cracks, laps or external bursts
Welds: To identify cracks, porosity, undercut, overlap, lack of fusion or lack of penetration

VISUAL INSPECTION

Visual Inspection, with or without visual aids, is the original and still highly effective method of NDE. Many defects can be detected by careful direct visual Inspection. Optical aids used include low power magnifiers, microscopes and telescopes. Borescope’s, endoscopes and other fiber-optic devices are used for Inspection of areas with restricted access. These devices can be used with television camera systems. High-speed visual Inspection may be used for tubular components.

EDDY CURRENT

Eddy current inspection - used to detect surface exuding defects such as fatigue without the need to remove protective coatings. More and more companies are opting to go in for Eddy current inspection due to inherent benefit of non-requirement of paint removal for inspection which is a drawback in the conventional NDT method of MPI. Eddy current eliminates the need of surface preparation and saves lot of time in paint removal and re- application of paint post inspection. Only at places indications received prove-up is done with MPI.

One of the major advantages of eddy current as an NDT tool is the variety of inspections and measurements that can be performed. In the proper circumstances, eddy currents can be used for:

Crack detection
Material thickness measurements
Coating thickness measurements
Conductivity measurements for:
- Material identification
- Heat damage detection
- Case depth determination
- Heat treatment monitoring

ULTRASONIC INSPECTION

Ultrasonic inspection – a quick and highly precise method for establishing the presence, extent and type of flaws in most materials. Ultrasonic Testing uses sound waves of short wavelength and high frequency to detect flaws or measure material thickness as an NDT method. Ultrasonic Testing is used to test welds, castings and wrought products such as rolled plate or forgings.

The detection and location of discontinuities is enabled by the interpretation of ultrasonic wave reflections generated by a transducer.

Information from ultrasonic Inspection can be presented in a number of formats:

A - Scan displays the amount of received ultrasonic energy as a function of time
B - Scan displays a profile view (cross-sectional) of a specimen
C-Scan displays a plan type view of the specimen & discontinuities

The relationship of flaw size, flaw distance and flaw reflectivity are complex and considerable skill is required to interpret the display.

RIG TOOLS & HANDLING TOOLS INSPECTION

Rig Tools & Handling Tool Inspection are carried out as per latest editions of API and OEM mentioned guidelines. Handling Tool inspections services include

MPI / Black and White contrast ink inspections
Ultrasonic Shear wave Inspections (optional)
On stressed and critical areas
Dimensional check (CAT III & CAT IV)
Individual documentation of inspection results

We have maintained detailed checklists & inspection reports for all the items which required Cat iii & Cat iv inspection as per the international standard.

WELLHEAD INSPECTION

On WELLHEAD INSPECTION we included following,

UT Wall Thickness Measurements on Well Head Casings
Magnetic Particle Inspection on Welds
Wall Thickness Evaluation
External flaw evaluation Through Magnetic particle Inspection

Acceptance and rejection will be based upon customer specifications or fitness for use criteria, as specified on the work order, or if not specified by the client, use the following API 5CT criteria.

Non Destructive Testing