MPI Under Seawater

Technical Diving Equipment

Measuring Equipment

Pommec BV Ampèreweg 6 4631 SP Hoogerheide Netherlands Tel.: +31 (0)164 615490 Fax.: +31 (0)164 613400 E-mail: [email protected]


Pommec BV Ampèreweg 6 4631 SP Netherlands Tel.: +31 (0)164 615490 Fax.: +31 (0)164 613400 E-mail: [email protected]

The Model U31 Underwater ACFM Crack Microgauge represents the latest in ACFM subsea inspection technology. The new instrument offers all the advantages of ACFM inspection, available on earlier instruments, but in a much smaller, lighter package designed specifically for ease of diver deployment. The system provides:

• Rapid scanning using a hand-held probe.

• Reliable crack detection and sizing (length and depth).

• Reduced cleaning requirements with no need to clean to bare metal.

• Capable of inspecting corroded surfaces, or through non-conducting coatings several

millimetres thick.

• Windows software for ease of operation and compatibility with other Windows applications.

• Full data storage for back-up, off-line view and audit purposes.

• Access to a wide range of geometries using a range of active subsea probes.

• Probes with embedded serial numbers to simplify operation and reduce likelihood of

operator error.

• Capable of operating at water depths up to 300m. Typical applications The model U31D instrument is used extensively for the inspection of offshore structures and is commonly specified for routine weld inspection on floating and fixed platforms. The range of probes available allows inspection of all common underwater structural weld details, including repair ground areas. ln addition to structural inspection, ACFM is also used for inspection of pipelines, vessels and marine components, including thrusters and propellers. The basic model U31D system can also be upgraded to operate with a range of multi-element array probes. These are particularly useful when inspecting uniform geometries or flat areas, such as marine propellers, thruster blades or FPSO mooring chains.

UNDERWATER ACFM CRACK MICROGAUGE MODEL U31D


Pommec BV Ampèreweg 6 4631 SP Netherlands Tel.: +31 (0)164 615490 Fax.: +31 (0)164 613400 E-mail: [email protected]

ROV use The model U31D system is specifically targeted at diver deployed inspection. The instrument can however be upgraded for ROV deployment, where the ROV provides power and comms. Systems are available for operation in water depths to 2000m.

SYSTEM SPECIFICATION Subsea Unit Weight: Subsea Unit Size: Probe Cable Length: Serial Communications Cable: Operating Temperature : Maximum Operating Depth: Power Requirements: Optional Array Support:

7.6kg in air 4.3kg in water 142mm diameter x 260mm 5 metres standard, up to 50m by special request. 5 metres as standard up to 30m if required. -200 C + 400C 300m as standard, can be extended to 2000m for ROV deployment 110v AC. 200m4 32 channels (i.e. 16 sensor pairs) with single field or 24 channels with twin fields, plus position encoder.



FEATURESIlluminated digital display Facility for adding remote monitoringSingle handed and lightSimple to use and maintainRobust and inert housing ·

TECHNICAL SPECIFICATIONOperating depth to 350m Display 0.001 to 1.999v 3½ digit LCDBacklitAccuracy 0.05% typical, instrumentcalibration accuracy ±1mV ±1 count Input impedance 10MWOperating temperature range 0 to 30°C temperature stability 100 ppm/°COperating time on full charge 50hr + Reference electrode: Ag/AgClContact with structure by hardened stainless steel probe input/output socket for charging, reference test, remote readout and on/off switchingWeight: in air 2.5Kg, in water 0.85KgInstrument size: 100mm diam. x 275mm longCarrying case size 440 x 310 x 140mm

‘BATHYCORROMETER’

DESCRIPTIONThe Bathycorrometer® is a consistent way of determining the corrosion of subsea structures. First developed primarily to allow the diver greater surveying freedomby providing direct readout at the point of application. The first unit went into rigorous North Sea service in 1971. Customersatisfaction with the performance of Bathycorrometers has led to specified use, world wide. The current model retains the features of the Roxby unit but with modern electronics.Bathycorrometers are used for polarisation, corrosion and interaction surveys, in particular as part of the commissioningcheck or inspection of: - Production and drilling platforms- Subsea pipelines- Ships hulls- Jetties and other marine works.

STANDARD KIT The Bathycorrometer is supplied in a fittedcarrying case together with:- Battery charger: 14hr standard 110 to 230

volts A.C. input - 6 x hardened stainless steel probe tips - Probe tip spanner and silicone grease

ACCESSORIES AVAILABLE - Silver/Silver chloride screw-in half cell- Stainless steel probe tips - Calomel reference cells- Zinc and Magnesium test blocks - BCM checker

TECHNICAL ADVISORY / AFTERSALESSERVICEA fast repair and re-calibration service is available to enable customers to fully maintain their equipment.



‘BATHYCORROMETER CALIBRATION KIT’

BATHYCORROMETER CALIBRATION KITThe Calibration Kit contains all the necessary components to verify the accuracy of the readings on the Bathycorrometer. There are two areas that need to be tested. The electronics are checked using the BCM Checker. If they are functioning correctly, the Silver / Silver Chloride screw-in half cell can be checked using the three Calomel reference cells in a standard salt water solution. The Calibration Kit contains all the necessary components to verify the accuracy of the readings on the Bathycorrometer. There are two areas that need to be tested. The electronics are checked using the BCM Checker. If they are functioning correctly, the Silver / Silver Chloride screw-in half cell can be checked using the threeCalomel reference cells in a standard salt water solution.

ADDITIONAL INFORMATIONBCM CheckerSilver/Silver Chloride screw in halfcellScrew in Calomel Reference cellAdaptor leads for H7Sea water corrosion test mixture

TECHNICAL SPECIFICATION BCM CheckerPower Supply: 9 volt battery (PP3) Battery Type: Alkaline MN1604 Output Voltage: 1.990 Volts Accuracy: ± 0.01% Temperature coeff: 30ppm/°CTemperature range: 0-30°C On Indicator: Green LEDLow battery indicator: Red LED Connection: 3 pin plug & probe clip

CALOMEL REFERENCE CELL Size: 155mm long x 25mm diam.Electrical Connection: screw fitOutput: -5mV @ 25°C to Silver/Silver

CHLORIDE CELLAccuracy: ± 2mV in 3% sea water Temperature coeff: +0.2mV per/°C Temperature range: 0 - 30 °C Working life:- up to 1 year



This Diver Navigation Console is a revolutionary navigation and survey platform that operates autonomously without the need for acoustic baselines or floating-point buoys. Integrating the data from a Doppler Velocity Log (DVL), fluxgate compass, and pressure transducer with the onboard navigation computer allows a diver to map the bottom topography (bathymetry), navigate accurate grid patterns, mark and relocate waypoints, and survey the bottom using geodetic data points.

Simply enter the geodetic

startingposition for the dive (GPS, LORAN, etc.) into the system’s on-board navigation computer, and the user-friendly firmware and LCD readout allow the diver to navigate with ease. All position and bathymetry data is saved in the navigation computer’s memory. The software enables you to retrieve and manage your mission data while the mapping software allows you to create powerful maps in a variety of formats. Additional file formats, such as ASCII and NEMA0183 allow any third party software to be used.

For complete field system capability, the diver navigation unit can be purchased with a weatherized notebook computer. This ruggedized computer, with its sunlight readable LCD, is ideal for managing your data even in the harshest offshore conditions.

THE DIVER NAVIGATION CONSOLE

Cobra-Tac Applications: Diver navigation and positioning Underwater search and relocation Hydrographic survey Harbor survey Coastal survey Inland waterway survey Marine biology survey

CobraTac Features: Waypoint, grid, mark and

survey navigation Location marking and tagging Automatic bathymetric data collection Diver track and event mapping Bathymetric mappingUser-friendly setup/download software





Track multiple divers simultaneously. Each diver obtains his/her own GPS position with assistance of the acoustic link. Each diver can also send sensor information and images to the surface support vessel.

This system is a low cost yet highly robust system. It tracks up to 16 targets at a range of up to 1000 meters with ship noise. This system sells at 40% lower price with improved accuracy (3 degrees) when compared against competing products. This system brings the convenience of an USBL system to a large number of users who typically do not have the budget for an expensive USBL tracking system.

System configuration The system contains a transceiver with transit case, an omni-directional transponder and Navigator Basic Software with drivers for GPS, compass and serial positioning data output.

Transceiver specifications Positioning accuracy 3 degrees (better than 5% of slant range)Slant range accuracy: 0,20 mtrTargets tracked: 16Operating beamwidth: 120 to 150 degreesWorking range with ship noise: up to 1000 meterMaximum transponder depth: up to 1500 meterOperating temp.: -2 to 45° CStorage temp.: -5 to 75° CWeight out /in water: 3,5 kg/1,2 kg

Transponder specifications Dimension: 25 cm x Ø 6,4 cmBattery storage time: 3 yearsBattery operation time: 1 yearActive responding time: 8 x 10 hoursWeight out/in water: 1,77 kg/0,86 kg

DIVER ACOUSTIC NAVIGATION AND TRACKING

Main Features Sharply reduced costs and improved system robustnessStrong rejection to multipaths and ship noiseAdvanced power-efficient DSP technology for transponders and USBL transceiverPC Windows tracking software. Interface directly to the transceiver. No need for a heavy proprietary deck unit.Small and lightweight transceiver for ease of installation on a ship

Technical Diving Equipment PORTABLE UNDERATER MPI UNIT

Produced following extensive research and development effort, this underwater magnetic particle inspectionunit has been developed as the ideal diver operated underwater MPI system for shallow water/tidal water use.

System Features

Totally self contained 12 volt battery powered High intensity switchable UV LampSwitchable 12V DC electromagnetic yokeInk supply unit (optional)

Inspection diving contractors revealed arequirement for a fully portable underwater MPI unit capable of being used by divers in shallowwater or tidal conditions. Ideally, the unitshould NOT require any form of umbilicalconnection to the surface and should be capable

of sustaining the inspection operation for up to 4 hours duration.

The result of this development is an inspection system powered from a 12 volt rechargeable batteryunit and comprising battery/control unit, DC electromagnetic yoke and a high intensity UV light incorporating an arc discharge bulb for high ultraviolet content in the light produced. Magnetic ink can be supplied by attaching the optional ink dispensing unit or even from the surface.

The pressure housings for the battery/electronic control unit and the lamp are fabricated from anodised aluminium alloy and are pressure tested to a depth of 600feet. A unique power-saving feature of the unit is that both the lamp and the DC electromagnetic yoke can be switched on/off by the diver. The electronic control system used for the gas discharge bulb in the UV lamp enables maximum UV output to be produced within 30 seconds of switching on the lamp and the electromagnetic yoke incorporatesa sealed switch unit giving the diver full operational control.

In the event that the optional dispensing system is used, the ink supply to the work piece can be incorporated into the handle of the UV lamp.

UV LAMP BATTERYU/V Output 2.3MW at 450mm Power 12 VVoltage 12V DC Capacity 12 Amp hourPower consumption 35 Watts Outputs 2 (UV lamp & Yoke charger)Dimensions Ø 110mm x 175mm length Dimensions 135 x 200 x 230 mmWeight 4Kg (in air) Weight 9 kg (in air)Depth 300 mtr Depth 180 mtr

YOKE INK SUPPLY (Optional)Voltage 12V DC Air or lever operatedCurrent drawn 2,5 Amps Capacity: 0,5 / 1 litrePull 20 Kg at 150mm spacingDimensions 480 x 200 x 220 mmWeight 3kg (in air)Depth 180m or 300m


Technical Diving Equipment MAGNETIC PARTICLE INSPECTION

This MPI system is a result of further development of well proven and highly successful OIS underwatertechnology systems which have been used by underwater operators around the world since 1980.

System FeaturesThree magnetising techniques in one systemFull surface control and monitoring facilitiesHigh intensity Ultra-Violet (U/V) LampDe-magnetising facilityTransformer isolated power supplyBuilt-in Earth Leakage DetectorsOperates at any depth

It is a modular design employing a sophisticated power control Surface Unit and an integrated, pressure compensated, Subsea Unit with built-in ink management systems.

A heavy duty isolating transformer supplies power to the Surface Unit, which is connected to theSubsea Unit via a single 200 metre umbilical, which is deployed from a strong hand-operated spooling frame.The Surface Unit is housed in a rugged stainless steel case with removable front cover. Its key features include:

An input-output current ammeterEarth Leakage detectors and tripsA magnetising loop operation indicatorA demagnetising facilityRemote control of the magnetising current

The Subsea Unit has AC and DC outlets for three magnetising techniques - Electromagnetic Yoke,Magnetising Coil, and Prods. The magnetising Coil & Prods can be AC or DC powered, whilst the Yoke is DC powered and allows bolt-on articulated sections to be fitted to enable inspection ofirregular/awkward-shaped work pieces. These three options allow the user to select the best tool for a particular structure or pipeline configuration, increasing operational flexibility and speeding up MPI diving programmes.

The Subsea Unit contains a 7KVA magnetising transformer, power/supply conditioning choke for the powerful UV lamp and a motor-driven ink circulation system which continuously agitates the magnetic particles. The top of the unit carries a 10 litre ink reservoir fitted with quick-release hoses to enable the diver to change the reservoir easily.The powerful UV Lamp is connected to the Subsea Unit via a 6 metre combined power and ink delivery umbilical. A lever-controlled ink nozzle on the lamp head allows one-handed operation.




TRITEX ULTRASONIC THICKNESS GAUGE 3000

The Multigauge 3000 Underwater Gauge is a simple, robust ultrasonic thickness gauge designed for most common underwaterthickness gauging applications. The gauge is pressure tested to 500m and has the option to transfer measurements to a surface display unit with the simple addition of a replacement end cap. It has been designed and built to survive extremely harsh conditionsthat exist in the offshore and underwater industries worldwide. Thegauge uses multiple echo which means measurements can be easilytaken without the need to remove coatings and the large brightLED display ensures the display can be seen by the diver, even in poor visibility.

The gauge is equipped with IPR (Intelligent Probe Recognition),which automatically adjusts settings in the gauge for enhanced performance and AMVS (Automatic Measurement Verification System) to ensure only true measurements are displayed, even on the most heavily corroded metals.

Features:Ignores coatings using multiple echo

Pressure tested to 500m

Bright clear LED display

Easy to use

No fuss upgrade option to a topside repeater

Rugged and robust

Intelligent probe recognition (IPR)

Automatic measurement verification (AMVS)

No zeroing required



About Triple Echo:

All Ultrasonic Thickness Gauges should becalibrated to the velocity of sound of the material being measured. Coatings have a different velocity of sound than metal and itis important they are not included in themeasurement. Triple Echo ensures allcoatings are completely eliminated from the measurement.

How it worksA transmitted ultrasound pulse travelsthough both the coating and the metal and reflects from the back wall. The returned echo then reverberates within the metal, with only a smallportion of the echo travelling back through the coating each time. The timing between the smallechoes gives us the timing of the echoes within the metal, which relate to the metal thickness. Thereturned echoes need not be consecutive as the gauge will interpret them automatically and calculate the thickness. A minimum of three echoes are checked each time. This is referred to as the AutomaticMeasurement Verification System (AMVS).

Specifications:



CTP-600Underwater Cable Tracker An easy to use Diver or ROV tool for detection and location of underwater communications cables

Applications Telecommunications Survey/MappingMaintenance and Inspection Cable Fault Location

FeaturesLocates and tracks surface-laid and buried cables Four standard preset frequencies (25, 50, 60, 1024 Hz) Frequencies set by internal switch, external switch, or software command via umbilical Warning lights: Leak detection and Low Battery

Specifications Maximum Operating Depth for Diver Tool: 250 feet (76.2 meters) Weight in Air: 4.1 pounds (1.9 kg) Weight in Seawater: 0.4 pounds (0.18 kg) negative Outputs: 16 Led light bar display in 6 db steps, Audio to diver earphone, RS-485 data to surface Battery Type: 6 each, AAA Alkaline Battery Mission Life: 8 hours minimum

OptionsSpecial Frequency Settings Computer Display Configurations for Surface Monitoring ROV Configuration with Right/Left Direction and Center Null Indication

CTP-600 UNDERWATER CABLE TRACKER



General Description The CTP-600 Underwater Cable Tracker is a replacement for the earlier model CTP-250 which was developed for the U.S. Navy Underwater Construction Team in the early 1980’s. The CTP-600 has improved upon this successful design by adding Digital Signal Processing (DSP)capabilities. All probes are tested to 125 psi and are shipped in a rugged, waterproof carrying case with waterproof operation and maintenance manual. The CTP-600 locates and tracks most cables on which an AC signal can be impressed. Four tracking frequencies allow differentiation between nearby live cables. The CTP-600 is equipped with a high intensity LED display for dark water conditions and a diver earphone. Additionally, data can be transmitted to the surface via an RS-485 interface umbilical. Power can also be supplied through the umbilical. For ROV operations the CTP -600 is mounted in a compact aluminium housing without the battery compartment. Power is supplied from the ROV and RS -485 data is transmitted to a surface PC for display and storage. Optional Left/Right sensors can be added to simplify the tracking process.

Diver Operation Prior to deployment with the diver, the CTP -600 is preset to the specific frequency that is impressed on the cable to be tracked. Upon determination of the general location, the diver slowly waives the probe across the ocean floor while watching the display or listening for an increase in the earphone signal. The tracking operation uses the “null” signal method. To either side of the cable, the indicator lights are at maximum level (peak). However, as the probe nears the cable, the number of display lights that are lit decrease. When the probe is directly above and pointed straight down the cable, the display lights decrease to a minimum reading and the cable position is very accurately determined. The electronics are sensitive enough that in many cases, the cable can be located from the surface, saving valuable time and resources. After cable location, the diver can be deployed for precise tracking.

ROV Operation The ROV tracking operation is similar to the diver method and also uses the “null” method for accurate determination of cable position. The tracking sensor and electronics canister are mounted on the ROV. Power is supplied from the ROV and the RS-485 sensor data are transmitted to a surface PC display. To simplify operations, optional left and right direction sensors may also be installed on the ROV.

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MPI Under Seawater