Specialist Inspection Services

Providing specialised inspection services for a global market Oil, gas, aerospace and utilities

NDT Global Services Limited is a specialist Non-Destructive Testing and Inspection company operating nationally and globally, providing innovative engineering and services for a multitude of industries including oil, gas, chemical and offshore. Services include: the inspection of pipelines, storage tanks, offshore and marine environments, boilers/ heat exchangers; the decommissioning, rehabilitation, installation and modification of pipelines. We utilise techniques and methods such as Guided Wave Testing (GWT) (LRUT), Phased Array corrosion mapping (PAUT), QSR (Corrosion under supports) API 570 evaluation/inspection.

NDT Global Services Ltd has built a reputation for innovation and solution based logistical thinking, inspection and engineering excellence, and the provision of its own experience and trusted inspection engineers for high quality and precision projects.

NDT Global Services specialises in Guided Wave Testing (GWT). Our Level 1, Level 2 and Level 3 engineers have extensive experience providing rapid data analysis, operating worldwide in varying environmental climates. Guided Wave Testing using the Wavemaker Pipe Screening System uses ultrasonic guided waves, sent along the length of pipe, to non-destructively test pipes for defects and other irregularities by detecting changes in the cross sections of the pipe. It is a non-invasive inspection technique permitting for the inspection of a vast range of lines whilst they remain operational. Little preparation of the line is required. The test can range up to 50m in either direction from the test location, up to 100m of line can be inspected in one test. Pipe sizes from 3/4” to 84” can be tested using the GWT method. API inspection of in-service metallic piping systems can be incorporated into any NDT Global Services inspection projects. Our team of engineers are Rope Access qualified IRATA level 1-3 to fulfill any project requirement.

Phased Array Corrosion Mapping technology is an advanced method of volumetric inspection using ultrasonic testing principles. In addition to multi-directional imaging of inaccessible backwall corrosion (or other wall thickness reductions such as abrasion or erosion), other applications for PAUT include highly detailed weld inspection, crack detection and visualisation of anomalous material inclusions.

Innovative electronic ‘beam steering’ enables the production of a fully active volumetric ultrasonic beam which allows for significantly increased sensitivity along with rapid data collection and detailed defect resolution. The Corrosion Mapping inspection method utilises an array of ultrasonic elements incorporated within an X-Y-axis scanner enabling precisely position-encoded circumferential and axial data collection from an asset.

The high-resolution imaging obtained using PAUT is achieved by utilising an effective 50mm wide ultrasonic beam collecting A-scan data across a matrix resolved to 0.5mm increments in both the X and Y directions. By combining the vast array of ultrasonic data collected from a single pass, 100% coverage of the inspection area is ensured. The high sensitivity of the phased array beam allows for detection of deflected and/or diffracted signals which ultimately allows for in-depth defect characterisation by imaging the true morphology of the damage mechanisms.

The Quantitative Short Rang system is designed to semi-automatically scan predefined sections of straight pipelines for corrosion under pipe supports. At each location along the pipe QSR1 automatically measures the pipe diameter, distance between Transmitter and Receiver, top Path wall thickness, bottom path wall thickness and the bottom path minimal wall thickness. QSR is capable of measuring the size of corrosion to the depths of up to half of the pipe wall thickness.

  • Inspects pipes on simple supports for touch point corrosion
  • Uses an innovative method for processing multimode signals that are sent around the circumference of the pipe
  • Scans along the top of the pipe under its own power
  • Uses motorised wheels to navigate the pipe
  • Measures quantitatively down to half wall loss and qualitatively for greater wall losses
  • Has axial resolution of 30mm
  • Adapts to inspect pipes of 8 to 16 inch diameter and ¼ to ½ inch wall thickness
  • Inspects through thin coatings and needs no couplant

NDT Global Services offers API 570 assessment inspections for pipeline systems. NDT Global Services Inspectors have assessed and certified pipelines ranging from large diameter lines to smaller diameter lines in both offshore oil and gas Petrochemical plants and refineries. API 570 assessment includes; inspection, rating, repair, and alteration procedures for metallic and fiberglass reinforced plastic (FRP) piping systems and their associated pressure relieving devices that have been placed in service. The purpose of API 570 is to specify the in-service inspection and condition-monitoring program that is needed to determine the integrity of piping. The review of the pipelines using this method of inspection should provide reasonably accurate and timely assessments to determine if any changes in the condition of piping could possibly compromise continued safe operation.

  • API 570 visual inspection
  • Calculations
  • Recommendations
  • Detailed report

Our inspectors are also API 653 and EEMUA159 certified for tank storage inspections.

NDT Global Services offer specialist pipeline and mapping services. The Pipeline Current Mapper (PCM) determines the location and measurement of pipelines and analyses areas of corrosion using electromagnetic detection devices. Our inspectors are able to locate the pipeline, even in heavily congested areas such as conduits, and then provides the operator with a measurement of depth current strength and signal direction applied by the transmitter to quickly pinpoint corrosion related problems. Real time mapping analysis (PDA or PC) using Radiodetection Survey software to provide faster analysis of mapped information, all information is immediately uploaded and linked with GPS into our database plotting locations and depths of pipelines.

Capabilities

  • Tracing of buried pipelines and utilities
  • Non invasive
  • Majority of buried pipeline leaks occur due to coating breakdown (External corrosion)
  • Accurate detection of weaknesses and holidays in oil and gas pipeline coatings
  • Accurate to within 1m of defect
  • Many miles can be inspected from one connection
  • Cross country or urban areas
  • Use of GPR (Ground penetrating Radar)
  • Accurate mapping and plotting of GPS co-ordinance
  • Establish centerline depth
  • Troubleshoot coating defects.

Our techniques are specifically designed to minimise intrusive inspections wherever possible. Unlike other companies our primary inspection method is Guided Wave Testing (GWT). Guided Wave Testing using the Wavemaker Pipe Screening System uses ultrasonic guided waves, sent along the length of pipe, to non-destructively test pipes for defects and other irregularities by detecting changes in the cross sections of the pipe.

Capabilities

  • Guided Wave Testing (GWT)
  • General and Close Visual Inspection
  • Ultrasonic Weld Inspection
  • Magnetic Particle Inspection
  • Phased Array and Time of Flight Diffraction
  • Liquid Penetrant Inspection
  • Hardness Testing
  • Eddy Current Inspection
  • Positive Material Identification
  • Ultrasonic Thickness Measurement

Inspection methods include

  • Inspection boat
  • Rope access IRATA level 1-3 Inspection Engineers
  • Drone cameras with recording capabilities

Jetty Inspection

Jetty leg inspection includes:

  • Visual inspection
  • Non destructive testing- Manual UT and Eddy Current
  • Rope access technicians to undertake close range inspection on the underside of the jetty
  • Boat/ floating pontoon for further inspection access
  • AutoCAD drawings
  • Assessment report using ultrasonic matrix surface topography program

Inspection access methods include:

  • Inspection boat
  • Rope access IRATA level 1-3 Inspection Engineers
  • Drone cameras with recording capabilities
  • Temporary modular floating pontoon.

Data gathered is analysed using our uniquely designed ultrasonic matrix surface topography program. The data analysis program can be used to analyse both coating thickness and material thickness. Topographical representation of pile face material thickness highlights all areas that fall below the critical minimum level. Degradation of material thickness is shown by a lightening of the grey material. Where the material thickness is below the critical minimum level (as defined by the client) it becomes highlighted in red, with a deepening red representing a thinner material. A full-penetration of the material wall is shown by a solid block of bright red.

Subsea Pipeline Inspection

NDT Global Services work with leading companies who are producing state of the art sub-sea pipeline inspection technologies. Our inspection engines are level 2 trained GWT Inspectors in this area and have extensive knowledge of sub-sea pipeline inspection technologies. Sub-sea inspection rings use the same technology as the surface GWT rings using ultrasonic guided waves. The sub-sea inspection rings are easily adjusted to fit different pipe sizes and are possible for both ROV and Diver Inspection. The advantages of using the SubSea rings include:

  • Screening unpiggable sections of line for internal or external corrosion/erosion.
  • Screening under weight coat and insulation with minimal cleaning and excavation.
  • The on-site analysis allows the ROV to perform follow-up indications.

We offer both ROV deployment and Diver deployment services. Our team has vast experience and has worked all over the world in varying water climates and conditions. ROV Deployment- The inspection equipment is mounted on the ROV. A hydraulic connection is used for opening and closing the ring. The test is carried out from the ROV control room. Diver Deployment- The test is controlled via an umbilical from a topside interface box to the Wavemaker instrument. The rings are installed on a clean section of pipe by 1 or 2 divers using a mechanical clamping mechanism.

Corrosion under supports

Our techniques are specifically designed to minimise intrusive inspections wherever possible. Unlike other companies our primary inspection method is Guided Wave Testing (GWT). Guided Wave Testing using the Wavemaker Pipe Screening System uses ultrasonic guided waves, sent along the length of pipe, to non-destructively test pipes for defects and other irregularities by detecting changes in the cross sections of the pipe.

Capabilities

  • Guided Wave Testing (GWT)
  • General and Close Visual Inspection
  • Ultrasonic Weld Inspection
  • Magnetic Particle Inspection
  • Phased Array and Time of Flight Diffraction
  • Liquid Penetrant Inspection
  • Hardness Testing
  • Eddy Current Inspection
  • Positive Material Identification
  • Ultrasonic Thickness Measurement

Inspection methods include

  • Inspection boat
  • Rope access IRATA level 1-3 Inspection Engineers
  • Drone cameras with recording capabilities

Gpims (Permanently installed monitoring system)

The environmentally robust gPIMS® range of sensors has been developed to be easily bonded to the pipe, sealed and then left in place. A cable connects the gPIMS® sensor to a connection box that can be located in a convenient, easy to access location. By performing repeat inspections and comparing the results to previous inspections, operators can monitor for any change in the condition of the pipe. Frequent data collection significantly improves sensitivity and reduces false call rates compared to conventional guided wave testing.

Gpims Monitoring System

  • No intrusive corrosion monitoring
  • General and Close Visual Inspection
  • Permanently installed guided wave monitoring system for repeatable ultrasonic data gathering
  • Deployed above ground below ground or subsea
  • Cloud based software
  • Innovative ultrasonic transducer design
  • Hardness Testing
  • Eddy Current Inspection
  • Positive Material Identification
  • Ultrasonic Thickness Measurement

Contact us

inspection@ndtgsl.co.uk

+44 (0)1642 555575

+44 (0)1642 555548

Our Global Inspection Locations

AFRICA ASIA EUROPE NORTHAMERICA OCEANIA SOUTHAMERICA